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This might be the most stupid question ever, but I need some help with aperture...
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<blockquote data-quote="Horoscope Fish" data-source="post: 188523" data-attributes="member: 13090"><p>Simply put any lens can stop down to f 22 and for most, that is as low as they go (yes, there are exceptions, so those of you about to get your knickers in a twist can relax now) so this is just assumed and not printed on the lens itself. </p><p></p><p>Not all lenses have the same <em>maximum</em> aperture.</p><p></p><p>The lens barrel shows maximum aperture for that lens at its <em>shortest</em> focal length and largest aperture the lens can do at its <em>longest</em> focal length. For example, if we have a 55-200mm f 3.5 - f 5.6 you can have f 3.5 at the shortest focal length (55mm) but at the longest focal length (200mm) you can't, you can have, at best, f 5.6 with this particular lens.</p><p></p><p>A lens that can have a maximum aperture of, say f 2.8 at 200mm would be said to be "faster" than a lens that can have a maximum aperture of f 5.6 at 200mm. It will also cost you significantly more, but that's a whole other issue.</p><p></p><p>I hope that helps to clarify...</p><p></p><p></p><p><span style="color: #FFFFFF">.....</span></p></blockquote><p></p>
[QUOTE="Horoscope Fish, post: 188523, member: 13090"] Simply put any lens can stop down to f 22 and for most, that is as low as they go (yes, there are exceptions, so those of you about to get your knickers in a twist can relax now) so this is just assumed and not printed on the lens itself. Not all lenses have the same [I]maximum[/I] aperture. The lens barrel shows maximum aperture for that lens at its [I]shortest[/I] focal length and largest aperture the lens can do at its [I]longest[/I] focal length. For example, if we have a 55-200mm f 3.5 - f 5.6 you can have f 3.5 at the shortest focal length (55mm) but at the longest focal length (200mm) you can't, you can have, at best, f 5.6 with this particular lens. A lens that can have a maximum aperture of, say f 2.8 at 200mm would be said to be "faster" than a lens that can have a maximum aperture of f 5.6 at 200mm. It will also cost you significantly more, but that's a whole other issue. I hope that helps to clarify... [COLOR="#FFFFFF"].....[/COLOR] [/QUOTE]
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This might be the most stupid question ever, but I need some help with aperture...
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