jdben622 Offline Buy and Sell: On
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p.1 #18 · 70-200 f/2.8l IS or without IS | |
Hmmm. Maybe I'm missing something. With the 2.8 in IS you theoretically get 3 more stops whereas the 4.0 IS gives you 4. If IS is employed, won't the available/useable ISO's and shutter speeds be the same for both lenses? I've used all three lenses, but don't have them all now and have had the 4.0 IS for less than a week. However, I'm not seeing how the 2.8 and 4.0 are not equal with IS utilized. If IS is not utilized, then of course a speed advantage goes to the 2.8. But if the OP is considering the 2.8 IS, then I don't know why the 4.0 IS isn't an option. Hand-held, it's a much easier lens to carry.
If IS is not an option for the type of shot, then often even 2.8 is not fast enough, and a 135/2 or 200/1.8 would be used if they were available and provided enough reach.
RE: throwing out the background, the 4 IS does a wonderful job and produces a nice, creamy bokeh. I'm enamored with dreamy backgrounds and have enjoyed using the 85/1.2, 135/2, and 200/1.8...all lenses that are renowned for their backgrounds. I'm not sure if the perceived bokeh from the 2.8 is significantly shallower than the 4.
The T/C is a good point I hadn't thought of as well as the overall AF speed in low light.
Edited on Feb 26, 2007 at 06:57 PM
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