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Lars Johnsson wrote:
How close to the animals are you most of the time when shooting? Are you using tripod and gimbal head? Or monopod, handheld?
How important is the cost of the lens?
Lars,
It is really pretty simple, the two bodies and the two long lenses that I use give me the opportunity to create a number of body and lens combinations that give me the field of view that I want in the situations in which I shoot and that give me a couple of combinations that give me a light weight, portable, and mobile rig when I need it.
When I use my 400 DO with my 1D Mark IV, it does give me a wider field of view for most of the subjects that I shoot, and, for me, it is a true joy to be able to use a 400 mm lens that I can shoot at f4 and that weighs a bit over 4 pounds and to be able to shoot it hand held for hours without even minimal fatigue. If I need more focal length, I can either use the 500/4 with the 1D Mark IV or use the 400 DO with the 7D for a more portable rig with similar field of view and that puts a similar number of pixels on the subject. The fields of view that I get with those two combinations are, by far, the ones that give me what I want when I want to be able to include a bit more environment and to have cropping and compositional latitude. If, however, I need more focal length, I can add the 1.4x to the 500 on the 1D Mark IV or I can shoot with the bare 500 on the 7D and maintain higher shutter speeds by avoiding the loss of a stop with a 1.4x. Finally, in the rare instances where I need even more focal length, I can add the 1.4x to the 500 on the 7D.
The combination of choice for me is based on the shooting situation, and regardless of which body or which lens I use, any differences in image quality are a lot less than you would be led to believe from reading internet posts. When I look at prints that I've made, I couldn't tell you which body or which lens I used without looking at the file information.
Since portability, light weight, mobility, etc. is a high priority to me, if I were using a full frame body, even with shooting wider than many others do, I'd need longer, bigger, heavier lenses, and, most importantly, my 400 DO, which is my favorite lens to use by far, would not meet the needs I have even with shooting wider than many do.
Thus, even with shooting wider than most, a 400 mm lens and a 500 mm give me the length I need and the range of fields of view that I want with a 7D and a 1D Mark IV, and I have no interest whatever in using bigger and heavier lens to accommodate a FF body.
Les
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