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Message: <blockquote data-quote="BackdoorArts" data-source="post: 136106" data-attributes="member: 9240">And this is why they'll never go away.  There's also the camp that equates speed with quality.  Someone once told me that, all other things being equal, fast glass only wins if you're shooting wide open - if you always shoot smaller than f4 then all you did was spend more money.  I'm finding I agree with him, but I do an awful lot of outdoor shooting.  If I made my living shooting indoors I would still probably want fast. Where I start questioning the differences is not so much 2.8 vs. 4 but at 1.4 vs. 1.8, which may be more the point of your argument, and in this range you are really left only with those who want to split hairs over razor thin DoF.</blockquote>