Camera, lenses, filters – what else do I need?

We are getting you "geared up" for an amazing experience in nature and wildlife photography.  I have discussed camera essentials, lenses, and filters in the last postings. This time I want to wrap-up the gear you will need  by discussing some of the accessories needed to photograph in the wild.

By now you know or have the big things needed to capture digital images, but as with most endeavors, the devil is in the details. So what is in the camera bag or backpack that keeps you taking great photographs? The first thing is the bag itself. There are 3 or 4 options for carrying your gear in the field. The first is going bare with lens and camera for a specific shot. This works sometimes but nature is not always predictable and more times than not, she will offer you amazing and totally unexpected opportunities, if you have your gear along. A second option is a traditional over-the-shoulder camera bag. This is nice near the car but usually doesn't lend itself well in the back country or down a long trail. A third option is a gear vest and/or a fanny pack. These were great in the film days when you needed many rolls of film and a means of separating fresh and exposed film but I find these are too small to carry extra lenses that I might need. Option four is a rigid travel case that works great in the city but has little role once you are outside your car. Finally, my choice for outdoor work is a purpose-design SLR back pack such as those made by Lowepro and Tamrac. In my Tamrac Expedition 5x pack I can carry a spare camera body, 5 lenses, and all of the accessories I will discuss later. It has an integral tripod holder and many tie-points to strap a water bottle and additional gear.  I added a padded waist belt and can haul about 30 pounds of gear for several miles in reasonable comfort.  Everything is padded, adjustable, and easily accessible.

Nothing can ruin a photo shoot faster than a full memory card or a dead battery.  For this reason I carry at least one spare battery for each camera body (and their chargers for both car 12VDC and AC mains (110 or 220VAC) with the proper adapters. I also carry a 32GB memory card in the camera and several 16 GB spares. I can shoot more than 1,000 high-resolution RAW shots with one battery and card.

I have a velcro filter case strapped to one shoulder in which I carry a variable neutral density filter, circular polarizing filter (CPL), and spare UV/haze filter. In the pack I carry a rectangular 2-stop hard-edge, graduated neutral density filter, holder and adapters. These filters usually get me through most difficult lighting situations. I also have a 5-way, collapsible reflector to help bring light to the shadows. At this time, I do not carry a flash/speed-light/strobe with me in the back country. I probably should but I find the pop-up, in-camera strobe and the reflector serve me well. Someday maybe I will find space for a flash, and a flash extender, flash filters, and spare flash batteries, and a bigger backpack.

In the bag I also carry a 1.4x teleconverter and a set of 3 extension tubes.  The teleconverter increases the range / magnification of my telephoto lenses and the extension tubes can be used to reduce the closest focus point of all of my lenses. These are especially useful for close-up and macro shots.

Don't forget to carry a remote shutter release with you in the wild. These come in several varieties from mechanical, to electrical, to infrared, to radio controlled. The important thing is to be able to fire your camera without touching it and causing motion (camera shake) during long exposures or high magnification shots such as macro or long telephoto shots.

Finally, in the bag I carry cleaning gear including a Lenspen brush, several microfiber cleaning cloths, lens cleaning solution, a blower, and lens paper. These essentials usually get me through any field clean-up operations and keep my optics clean.

Lastly, the most important accessory of all, is your camera stabilization gear - your tripod. Camera stabilization is critical for telephoto shots, long exposure shots, high dynamic range (HDR) shots, panorama shots, macro and close-up shots - did I miss anything? I cannot emphasize the importance of a good tripod in capturing good photographs. Not all shots are taken with a tripod but many are, and virtually all shots could be improved if a tripod is used. Now the reality is that tripods are large, bulky, awkward, and heavy to carry.  However, small, light-weight tripods are totally worthless and a complete waste of money.  The purpose of a tripod is to provide an absolutely rigid mount for your lens or camera - it must be solid, sturdy, and stable. What choices are available?

One of the first choices in selecting a tripod is the strength defined by the maximum load weight capacity. You need a tripod capable of holding the head, camera, and largest lens you will use. Once you know the weight capacity you need to choose the construction - most tripods today are made of aluminum or carbon fiber. Pound for pound, carbon fiber is lighter, stronger, more durable, and more capable of reducing vibration than is aluminum - obviously, with these qualities, it is also more expensive. Next, you need to consider the maximum and minimum heights at which the tripod can be used.  High quality tripods have legs that extend widely to place the camera very low to the ground and straighten to give lift to eye-height.  Some tripods have a central elevating column to gain additional height.  The center columns often reduce the stability of the tripod when extended and interfere with lowering the tripod for low-level ground shots.  

Two other choices are available in tripod construction - the number of leg sections and the means of securing the leg extensions. Most brands of tripods have both 3 and 4 section leg extension models. The 3 extension models are usually quicker to set-up, stronger and sturdier but also fold to a longer storage length. The extensions can be secured by either flip-locks or twist locks. People tout the advantages of both but as long as the locks are strong, I don't think the type of lock makes a difference. Some tripods offer padded feet with extension spikes for greater stability.

Sometimes a monopod is a useful camera stabilization tool in the wilderness. It is no substitute for a good tripod but the monopod can reduce fatigue and add stability to action shots such as sports or birds in flight. Monopods have aluminum or carbon fiber construction and are available with a 3 or 4 section leg. Some tripods have a detachable leg that works as a monopod. Some inovative photographers have modified their monopods to be used as a walking stick or their walking sticks to be used as a monopod.

As if tripods were not difficult enough, the head that joins the tripod to your camera or lens is even more complicated. Older tripods used almost exclusively a "pan and tilt" head to control the three planes of rotation of the camera on the tripod. These heads are modification of what was used for video and movies. These heads require either two or three adjustment knobs to change the camera position. Most still photographers in recent years have adopted a ball-head mount. The ball head allows faster re-positioning by loosening only one adjustment knob to move the camera in all three planes. The ball-heads come in several sizes and the larger sizes usually support the most weight and give the greatest stability. There are many designs of the ball-heads and costs vary widely. The third type of head used by nature photographers is the gimbal head. This is a significantly larger mount that is necessary for today's super-telephoto and very large aperture lenses. The gimbal mount keeps the center of gravity of the camera and lens at the exact center of rotation so there is no resistance to movement and no tendency for the heavy lens to drop downward as it can with a pan-and-tilt or ball-head mount. These gimbal mounts are fairly heavy and quite expensive.

The last accessory is a quick-release fitting between you tripod head and camera or lens. The quick-release comes in several styles but the ARCA-Swiss style is becoming an industry standard. The quick-release allows a strong and stable connection between your camera/lens and tripod but yet allows the camera to be removed quickly for hand-held shooting. The last thing you want to do to your camera is to screw it off and on your tripod and risk damage to the camera or lens. The quick-release is a good solution. Get a system for your tripod(s) and a mounting plate for each camera/lens with a fitting.

With all of the complexity of tripods and heads, you might ask what do I use? Unfortunately, the answer is all of the above. For years I got along with a Manfroto carbon fiber tripod with center column elevator, 4-extension, snap-lock legs, and a ball-head. It was a perfect union for the nature photographer who like to hike deep in the woods or high in the mountains. Then I got my 600mm f/4 super-telephoto lens. This monster 12 pound lens simply could not be used safely or comfortably on a ball-head so I was forced to get another tripod and head - this time a Sirui carbon fiber tripod without a center column elevator with 3-extension, twist lock legs and a Wimberly gimbal head. This is a rock-stable rig that will hold the heaviest dSLR lenses and cameras made - but, it is heavy. The tripod weighs over 5 pounds (and extends to my full height) and the head weighs another 4 pounds. Add a 3 pound camera and 12 pound lens and it makes you want to give up hiking!

There you have it - all the accessories you will need to accumulate for serious nature photography. So before you dip your toe in this water consider the merits of a nice 1.5 pound point-and-shoot camera with a super-zoom lens - it does a pretty good job and will always be with you in the wild.

 

So what lens is right for me?

In the last posting, I discussed the various general types of lenses - normal, wide-angle, and telephoto - and the pros and cons of fixed (prime) lenses and zoom lenses. Now, I would like to get more specific about the selection of focal length and add some specialty lenses and lens accessories to the mix.

The focal length of a lens is the distance from the optical center of focus within the lens to the plane of the image sensor in the camera. Focal length is usually measured in millimeters (mm) and the longer the focal length the greater the size of the image on the sensor (sometimes referred to as magnification.) I mentioned that a lens with the field of view of our eyes in approximately 50mm when projected on a full-frame (24x36mm) sensor. However, most cameras use a sensor smaller than full-frame that is called a crop sensor. The camera is designed so that the crop sensor still 'sees' the full image so, effectively, the image is magnified by the crop factor of the camera. Typically, point and shoot cameras have a very large crop factor (from 2 to almost 6) so that the effective focal length of the lens is much greater than the measured focal length (compared to full-frame sensor.) This is why many point and shoot cameras are referred to as 'super-zoom' cameras and their zoom range is defined as the magnification beyond the shortest focal length of the lens (12x, 15x, 20x and even 30x.) Digital SLR cameras do not use this 'magnification' terminology but rather relate the effective focal length to that of a full-frame sensor.

So how does crop factor influence the effective focal length of the lens. Many dSLRs from Nikon, Sony, Samsung, and Pentax have a crop factor of 1.5 while most Canon dSLRs have a crop factor of 1.6. The crop factor is multiplied times the actual focal length to obtain the effective focal length seen on the sensor.  In other words a normal 50mm lens on a Canon 1.6 crop sensor looks like an 80mm lens. So this 'normal' lens is working like a short telephoto (if you were shooting on a full-frame camera.) This effect has a tremendous advantage for a wildlife photographer who always wants a longer lens to create images closer to the subject. Effectively, a 200mm (medium telephoto) functions like a 320mm lens on a Canon crop sensor camera. A 70-200mm zoom functions like a 112-320mm zoom. This sounds like a real bonus but what if you are shooting landscapes with a wide-angle lens? Now your 24mm (medium wide-angle) lens acts like a 38.4mm (barely wider than normal) lens. This is part of the reason that landscape photographers like full-frame cameras - they can maximize their wide-angle ability.

So when purchasing a new lens you must carefully consider the type of photography you will be doing and the crop factor of your camera to select a lens that will give you the effect you desire.

There are also several types of specialty lenses that appeal to nature photographers. The first is a macro lens. A macro lens is specially designed for a very close focusing distance for its focal length. A true macro lens projects an image of the subject at its full size on the camera sensor - a 1:1 image. Macro lenses come in different focal lengths depending upon how close to the subject you can get. Typically, macros range from 60mm to about 200mm. These lenses are designed for ultra-sharp images captured at very close distances and are often used to shoot flowers, insects, and other small critters. Focusing a macro lens is a challenge because the the very narrow depth-of-field - often only a millimeter or two when wide open (f/2.8.)  Depth of field is improved if the lens can be stopped down (f/11- f/32) but this usually means a very long shutter speed or supplemental light using a reflector or flash. Some general lenses have a close-focusing feature they refer to a a macro function. I have used this to advantage on my small Sony camera but it is not a true macro because you cannot focus down to a 1:1 size - mine is more like a 1:2 but it still focuses down to about 3-4 inches from the subject.

Another lens sometimes used by landscape photographers is a fish-eye lens. A fish-eye is an extreme wide-angle lens (6-10mm focal length) that is able to capture nearly a 180 degree view. These lenses cause extreme distortion of the image resulting in curving horizons than are usually interesting and can be very pleasing to view.

With all of the choices of lenses, what is the best general 'carry-around' lens for everyday photography? This is a very difficult question to answer and most photographers will tell you that a 24-70mm zoom is a good all around lens (best on a full-frame camera.) This lens gives you a mild wide-angle to short telephoto perspective and can be fast (f/2.8) and not unwieldly large. I like this lens a lot when I am in town shooting what-ever comes by, but it is not my favorite lens in the wilds. It is generally too short for birds and animals and not wide enough on my crop-sensor camera for great landscapes. It is fast for dawn and dusk shots but I almost always carry 25-30 pounds of other lenses and gear when I hike to take wildlife or scenic shots. Some people like super-zoom lenses (28-300mm) for general work. Often these lenses are slow (f/5.6 or worse) and some lack high quality optics so I have avoided the super-zooms.

Finally, how does one properly accessorize your lens? A lens case is a good thing to keep in the closet at home or to store your lens when you are not shooting, but I never use lens cases in the field because they add unnecessary volume to the gear and it takes too much time to get the lens out of the case. I keep my lenses in my pack with lens covers on front and back to protect from dust and weather. 

There is controversy among photographers about using a UV/haze filter to protect the front of your active lens. Clearly, low quality glass in front of your expensive lens can degrade image quality and introduce lens flare on back-lit images so these should be avoided. I have chosen to use high-quality neutral (UV/haze) filters on the front of most of my lenses. It is a high cost but does keep dust off the much higher cost lens. I have never dropped or scratched a lens so I can't (yet) vouch for the protective effect of the neutral filter. Many (maybe most) professionals advise against a neutral filter over the lens. They doubt the protective effect if the lens is dropped and worry about the negative effect on image quality. Almost all professionals use a lens hood on all lenses. The hood protects the front of the lens from damage, reduces the likelihood of lens flare on back lit images, and has no negative effect on image quality. I always use a lens hood unless I need to rotate a polarizing filter or variable neutral density filter or am using a rectangular graduated neutral density filter.  These filters will be discussed in the next posting.

So what lens is right for me?

In the last posting, I discussed the various general types of lenses - normal, wide-angle, and telephoto - and the pros and cons of fixed (prime) lenses and zoom lenses. Now, I would like to get more specific about the selection of focal length and add some specialty lenses and lens accessories to the mix.

The focal length of a lens is the distance from the optical center of focus within the lens to the plane of the image sensor in the camera. Focal length is usually measured in millimeters (mm) and the longer the focal length the greater the size of the image on the sensor (sometimes referred to as magnification.) I mentioned that a lens with the field of view of our eyes in approximately 50mm when projected on a full-frame (24x36mm) sensor. However, most cameras use a sensor smaller than full-frame that is called a crop sensor. The camera is designed so that the crop sensor still 'sees' the full image so, effectively, the image is magnified by the crop factor of the camera. Typically, point and shoot cameras have a very large crop factor (from 2 to almost 6) so that the effective focal length of the lens is much greater than the measured focal length (compared to full-frame sensor.) This is why many point and shoot cameras are referred to as 'super-zoom' cameras and their zoom range is defined as the magnification beyond the shortest focal length of the lens (12x, 15x, 20x and even 30x.) Digital SLR cameras do not use this 'magnification' terminology but rather relate the effective focal length to that of a full-frame sensor.

So how does crop factor influence the effective focal length of the lens. Many dSLRs from Nikon, Sony, Samsung, and Pentax have a crop factor of 1.5 while most Canon dSLRs have a crop factor of 1.6. The crop factor is multiplied times the actual focal length to obtain the effective focal length seen on the sensor.  In other words a normal 50mm lens on a Canon 1.6 crop sensor looks like an 80mm lens. So this 'normal' lens is working like a short telephoto (if you were shooting on a full-frame camera.) This effect has a tremendous advantage for a wildlife photographer who always wants a longer lens to create images closer to the subject. Effectively, a 200mm (medium telephoto) functions like a 320mm lens on a Canon crop sensor camera. A 70-200mm zoom functions like a 112-320mm zoom. This sounds like a real bonus but what if you are shooting landscapes with a wide-angle lens? Now your 24mm (medium wide-angle) lens acts like a 38.4mm (barely wider than normal) lens. This is part of the reason that landscape photographers like full-frame cameras - they can maximize their wide-angle ability.

So when purchasing a new lens you must carefully consider the type of photography you will be doing and the crop factor of your camera to select a lens that will give you the effect you desire.

There are also several types of specialty lenses that appeal to nature photographers. The first is a macro lens. A macro lens is specially designed for a very close focusing distance for its focal length. A true macro lens projects an image of the subject at its full size on the camera sensor - a 1:1 image. Macro lenses come in different focal lengths depending upon how close to the subject you can get. Typically, macros range from 60mm to about 200mm. These lenses are designed for ultra-sharp images captured at very close distances and are often used to shoot flowers, insects, and other small critters. Focusing a macro lens is a challenge because the the very narrow depth-of-field - often only a millimeter or two when wide open (f/2.8.)  Depth of field is improved if the lens can be stopped down (f/11- f/32) but this usually means a very long shutter speed or supplemental light using a reflector or flash. Some general lenses have a close-focusing feature they refer to a a macro function. I have used this to advantage on my small Sony camera but it is not a true macro because you cannot focus down to a 1:1 size - mine is more like a 1:2 but it still focuses down to about 3-4 inches from the subject.

Another lens sometimes used by landscape photographers is a fish-eye lens. A fish-eye is an extreme wide-angle lens (6-10mm focal length) that is able to capture nearly a 180 degree view. These lenses cause extreme distortion of the image resulting in curving horizons than are usually interesting and can be very pleasing to view.

With all of the choices of lenses, what is the best general 'carry-around' lens for everyday photography? This is a very difficult question to answer and most photographers will tell you that a 24-70mm zoom is a good all around lens (best on a full-frame camera.) This lens gives you a mild wide-angle to short telephoto perspective and can be fast (f/2.8) and not unwieldly large. I like this lens a lot when I am in town shooting what-ever comes by, but it is not my favorite lens in the wilds. It is generally too short for birds and animals and not wide enough on my crop-sensor camera for great landscapes. It is fast for dawn and dusk shots but I almost always carry 25-30 pounds of other lenses and gear when I hike to take wildlife or scenic shots. Some people like super-zoom lenses (28-300mm) for general work. Often these lenses are slow (f/5.6 or worse) and some lack high quality optics so I have avoided the super-zooms.

Finally, how does one properly accessorize your lens? A lens case is a good thing to keep in the closet at home or to store your lens when you are not shooting, but I never use lens cases in the field because they add unnecessary volume to the gear and it takes too much time to get the lens out of the case. I keep my lenses in my pack with lens covers on front and back to protect from dust and weather. 

There is controversy among photographers about using a UV/haze filter to protect the front of your active lens. Clearly, low quality glass in front of your expensive lens can degrade image quality and introduce lens flare on back-lit images so these should be avoided. I have chosen to use high-quality neutral (UV/haze) filters on the front of most of my lenses. It is a high cost but does keep dust off the much higher cost lens. I have never dropped or scratched a lens so I can't (yet) vouch for the protective effect of the neutral filter. Many (maybe most) professionals advise against a neutral filter over the lens. They doubt the protective effect if the lens is dropped and worry about the negative effect on image quality. Almost all professionals use a lens hood on all lenses. The hood protects the front of the lens from damage, reduces the likelihood of lens flare on back lit images, and has no negative effect on image quality. I always use a lens hood unless I need to rotate a polarizing filter or variable neutral density filter or am using a rectangular graduated neutral density filter.  These filters will be discussed in the next posting.

Selection of essential lenses for nature photography

Now that you have a new camera and know the basic exposure controls, it is time to get serious about selection of lenses for nature photography. First, understand that brand is not as important as quality and functionality. Generally, it is best to stick to lenses made specifically for your camera body - usually by the camera manufacturer, but not always. Most photographers will tell you that the quality of your glass is more important than the quality of your camera. So what questions must be asked to select the lenses that will help your improve you images the most?

Before you can choose a lens you must consider if you want a lens that will work only for your current camera body or will it work or future camera body upgrades. Most companies make a line of lenses that is designed specifically for smaller, crop sensor cameras. These sensors are smaller than full-frame sensors that are the size of 35mm film (actually about 24x36mm.) All entry-level digital single lens reflex cameras currently use a crop sensor. The crop factor is typically 1.5 on Nikon and 1.6 on Canon cameras (more about crop factor later.) Lenses made especially for the crop-sensor cameras (Canon calls these EF-S lenses) are usually smaller, lighter, and less expensive so they are aimed at the entry-level photographer. While they work well on the smaller cameras (and some are of very high quality), they will not work at all (or even fit on) the high level, full-frame cameras. Other lenses are inter-changeable between crop and full-frame cameras.  Canon calls these all around, full-line lenses their EF series. Across the board, the EF lenses are generally of higher quality. Canon also has a special series of EF lenses that are called the L lenses (luxury?) that are identified by a red band around the lens. These are extremely high quality, metal framed lenses, that have improved designs, high quality and exotic glass, and additional weather sealing for professional performance.

The first question in selecting a lens is, what are you going to photograph? If you are shooting exclusively landscapes, your lens selection will be far different than if you are going to shoot birds. Keeping this first question in mind, lets look at some basic issues we all must face when selecting a new lens.

Everything in photography is a trade-off and lenses are no exception. Quality of construction and, most importantly, quality of the glass used is of fundamental importance. There is a huge trade-off because high quality almost always means high cost. Two quality factors easily examined are the exterior construction (plastic versus coated metal) and the lens-to-camera connection (should always be metal, and ideally weather-sealed.) Other factors that must be considered are addressed in the specifications for the lens. Ideally, you want a lens with fast auto-focus and, for longer lenses, image stabilization (or vibration reduction for Nikon lenses.) These features will improve your ability to get well-focused shots with no blur caused by camera shake but also add to the cost of the lens.

The most important feature of all lenses is their "speed" defined by the largest aperture or f-stop.  Fast lenses are necessary to freeze motion, shoot in low light, and control the depth of field (DoF.) Fast lenses have a maximum aperture of f/4, f/2.8, or even larger. Since the f-stop is calculated as the quotient between the focal length and maximum diameter of the light path through the lens, it is easy to see that fast lenses (large maximum aperture) are very large lenses, heavy lenses, and expensive lenses.  For example, a Canon 400mm L-series f/5.6 lens weighs about 2.75 pounds and costs about $1,300 while its big brother 400mm L-series f/2.8 weighs about 8.5 pounds and costs about $11,500. Maximum aperture is a very big deal!

Another issue to consider is choosing a prime lens versus a zoom. Prime lenses have a fixed focal length and are generally sharper, lighter, and simpler in design. They also tend to be much more expensive because of the quality of construction. Zoom lenses are generally more popular, more complex, and not as sharp. Zoom lenses are also much more convenient for most photographers since they can carry fewer lenses and still frame their shot conveniently from one position.  Popularity of zoom lenses makes them sell better and in spite of their more complex design, they tend to be less expensive than their prime counterparts.

Now we come full circle to the first question about photographic subjects and focal length of the lens. The focal length determines the field of view and therefore the 'magnification' of the image. A 'normal' lens gives the approximate view we see with our unaided eyes. The focal length of a normal lens on a full-frame camera is about 50mm (or slightly less.) Lenses with a broader angle of view are called wide-angle lenses and those with a narrower view are called narrow-angle lenses - not really(!), they are called telephoto lenses. Wide-angle lenses are great for landscapes and some close-up work and give the feel that the viewer is immersed in the image. They tend to have great DoF and very close minimal focusing distance. They cause some distortion of the image at close range and are very forgiving in focusing.  On the other hand, telephoto lenses are great for wildlife shots and some distance shots. They tend to have a narrower DoF and flatten the perspective of the image thereby removing the viewer from the subject.  They tend to cause less distortion and are very sharp but are more critical in their range of focus and minimal focusing distance.

Some zoom lenses cross the line between wide-angle and telephoto. This is very convenient because fewer lenses are needed for a wider range of images but extreme zoom lenses, for technical reasons, tend to be of lower quality and have issues with sharpness and distortion.

In the next posting we will take on the issue of crop factor and its effects on the image and general care and protection of your lenses.