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[Photog Stuff] Rich, Kawi ...
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[QUOTE="Okiewan, post: 1103882, member: 16119"] Got the Canon 10-22mm last night, took some shots and was having real problems with it, but think I figured it out (seems obvious now), but I need some help. If I recall, using the 10-20 Sigma, there was little effect in aperture settings; meaning, not much difference in a general wide shot, regardless of small or large aperture. Obviously, UWA is known for massive DOF, I just assumed the Canon would be the same... effected little by aperture. The Canon, being an EF-S, (specifically made for canon's 1.6x crop sensors) is MUCH more sensitive to aperture. I kept getting OOF edges on wide shots, thinking the lens needed to be calibrated. So I did some "test" shots in the studio this morning... where I discovered the lens' ability to show shallow DOF, something I don't "think" the Sigma did, or at least not as much. Now, in a UWA I'm not saying this is better... just different. I'm guessing, because the EF-S' back lens gets closer to the sensor than a non ef-s (the sigma), there is more aperture sensitivity. If you guys can, please take a shot at 4.5, close up to something, like this drill (something that has some front to back depth). The specs here; distance to drill, around 6"-7", 20mm, f/4.5 . The focus point was the front of the chuck. I'd really like to see a comparison. Doable? [/QUOTE]
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[Photog Stuff] Rich, Kawi ...
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