“Why do you need a full frame camera?”
We have heard many different answers to this question… “Because most pros use Full frame camera.” “Because a full frame camera is better than a crop factor camera.” “Because a full frame camera has better dynamic range or tonality.” “Because my photos come out better on a full frame camera.” We believe that both crop factor and full frame cameras have their pros and cons, and we often use one over the other when the situation calls for it.
Let’s start with the full frame camera. Because of its larger pixel size, when compared with its crop-factor counterpart, it is typically associated with lower noise levels at higher ISO settings. (We are comparing cameras that appeared on the market at about the same time… not ones that were introduced several years apart). So, our first choice for shooting low-light or night photography would be the full frame camera because of it’s high ISO capabilities. There are also more options for prime lenses that fit a full frame camera – including tilt-shift (T/S) lenses in the wide-angle range. Sure, these prime lenses can be used on a crop factor body… but their effective focal length will be longer. When shooting with a wide-angle T/S lens, we prefer to use a full frame camera.
Night Shot with Full Frame Camera
What about a crop factor camera? One of the biggest drawbacks of the crop factor camera is also its biggest advantage - the multiplier effect. The crop sensor increases the effective focal length of the lens you are using. The crop factor makes a wide-angle lens longer (an 18mm lens with a 1.6 crop factor has an effective focal length of 28mm) – and a long lens even longer (a 400mm lens on a 1.6x crop camera has an effective focal length of 640mm)! That means that a crop factor camera is an excellent choice when you are shooting wildlife. Macro photographers also benefit, because the multiplier effect gives the photographer a larger working distances and more DOF for the same field of view.
300mm lens with 1.6x = 480mm effective focal length
When using a wide-angle lens on a crop factor body, the near DOF limit is a lot closer than the equivalent focal length lens with a full frame camera. As a result, a crop factor camera can get closer to the subject than a Full frame camera for the same field of view. Crop factor cameras are great when you want to get really close to your subject and still shoot wide. We were awfully happy to have a crop factor camera in Utah’s slot canyons!
10mm with 1.6x = 16mm effective focal length
So the choice between a crop factor camera and a full frame comes down to the situation. There’s no “right” answer here! We like to have one of each so that when we are in the field, we can choose the right lens for the job.
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