S
smirkypants
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I wholeheartedly agree with Neuro on the dust issue. As long as someone doesn't use the phrase "dust-pump" I promise to remain calm. I've taken my 100-400 to hell and back and there's no dust in it. I've shot in a dust storm pumping like mad. Nada. No dust.
I don't necessarily agree with Neuro on the image quality issue. I find it rather dodgy, especially on the long end. Also, the lens needs a LOT of light. This is purely my experience so, you know, who knows if it's generalizable, but I did an experiment with my 100-400 and a 70-200+2x converter. I set both to auto ISO and shot the same thing, and generally the 100-400 shot at a higher ISO, usually 1/3 stop but sometimes 2/3, even though both were 5.6.
Of course who the hell knows what was really going on. There are a lot of possible variables and I'm not a tech guy as much as an art guy.
I don't necessarily agree with Neuro on the image quality issue. I find it rather dodgy, especially on the long end. Also, the lens needs a LOT of light. This is purely my experience so, you know, who knows if it's generalizable, but I did an experiment with my 100-400 and a 70-200+2x converter. I set both to auto ISO and shot the same thing, and generally the 100-400 shot at a higher ISO, usually 1/3 stop but sometimes 2/3, even though both were 5.6.
Of course who the hell knows what was really going on. There are a lot of possible variables and I'm not a tech guy as much as an art guy.
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