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Nikon DSLR Cameras
D5100
How to focus a lens manually to infinty for astronomical shots
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<blockquote data-quote="madcapmagishion" data-source="post: 85074" data-attributes="member: 9159"><p>Yes I have heard that you can go .... "<strong><u>To Infinity and Beyond"</u></strong> ... I have basically the same gear as you do except I have the 50mm f/1.8 and not the 35mm like yours.</p><p></p><p>Almost all AF lenses actually go past the Infinity setting, this is designed into the lens itself to prevent fast AF lenses from hitting the "brick wall" so to speak when adjusting focus. When they reach infinity the sensor will stop the AF function, but the lens has that built-in "cushion" range just to avoid possible damage to the lenses focusing system. When a lens is brand new it is not really an issue, but as the mechanism wears there is the possibility that some play will develop and allow for that damage so the manufacturers allow for that. Smart thinking in my opinion.</p><p></p><p>You can do as tracsoft suggests above and "Play with it sometime in bright sun to see where infinity is"</p></blockquote><p></p>
[QUOTE="madcapmagishion, post: 85074, member: 9159"] Yes I have heard that you can go .... "[B][U]To Infinity and Beyond"[/U][/B] ... I have basically the same gear as you do except I have the 50mm f/1.8 and not the 35mm like yours. Almost all AF lenses actually go past the Infinity setting, this is designed into the lens itself to prevent fast AF lenses from hitting the "brick wall" so to speak when adjusting focus. When they reach infinity the sensor will stop the AF function, but the lens has that built-in "cushion" range just to avoid possible damage to the lenses focusing system. When a lens is brand new it is not really an issue, but as the mechanism wears there is the possibility that some play will develop and allow for that damage so the manufacturers allow for that. Smart thinking in my opinion. You can do as tracsoft suggests above and "Play with it sometime in bright sun to see where infinity is" [/QUOTE]
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Nikon DSLR Cameras
D5100
How to focus a lens manually to infinty for astronomical shots
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