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Photography, Digiscoping & Art
The Birdforum Digiscoping Forum
Camera focussing problems
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<blockquote data-quote="jmepler" data-source="post: 1242407" data-attributes="member: 59160"><p>Bartolli,</p><p></p><p>I believe that your problem is that your camera will not focus closely enough to come to focus through your scope when you have zoomed in. I have the same issue with my Canon A570. </p><p></p><p>Here is why I believe that is your problem. When you shoot at maximum wide angle (no zoom) your images look pretty good. At this setting your camera will focus down as close as 2" (5 cm). As soon as you zoom at all your camera will only focus as close as 11.8" (30 cm). Some experimentation will my A570 showed that my camera needed to focus at around 9-10" to match what I saw as in focus visually. This would mean that you could not zoom and still come to focus.</p><p></p><p>There is a way around your problem. Here is what has worked the best for me:</p><p>-Depress the shutter release half way</p><p>-Hold the shutter release there</p><p>-Re-focus your scope using the camera's display</p><p>-Remove your finger from the shutter release</p><p>-Depress the shutter release half way again and recheck focus</p><p>-Repeat if necessary</p><p></p><p>Depressing the shutter release half way will lock the auto-focus. </p><p></p><p>Adjusting the scopes focus after the camera has gotten as close to focus as it can should allow the camera to come to a sharp focus.</p><p></p><p>I find that I get the best results if I adjust focus a little beyond what looks sharp, that gives the camera some latitude to come to sharp focus.</p><p></p><p>Also, since you are using the camera auto-focus again after you make your scope focus adjustment the focus is less critical compared to manual focus.</p><p></p><p>I know that it is counterintuitive that you should change your scopes focus from what looks sharp to you visually, try it and let me know how it works for you.</p><p></p><p>Good luck,</p><p>Mike</p></blockquote><p></p>
[QUOTE="jmepler, post: 1242407, member: 59160"] Bartolli, I believe that your problem is that your camera will not focus closely enough to come to focus through your scope when you have zoomed in. I have the same issue with my Canon A570. Here is why I believe that is your problem. When you shoot at maximum wide angle (no zoom) your images look pretty good. At this setting your camera will focus down as close as 2" (5 cm). As soon as you zoom at all your camera will only focus as close as 11.8" (30 cm). Some experimentation will my A570 showed that my camera needed to focus at around 9-10" to match what I saw as in focus visually. This would mean that you could not zoom and still come to focus. There is a way around your problem. Here is what has worked the best for me: -Depress the shutter release half way -Hold the shutter release there -Re-focus your scope using the camera's display -Remove your finger from the shutter release -Depress the shutter release half way again and recheck focus -Repeat if necessary Depressing the shutter release half way will lock the auto-focus. Adjusting the scopes focus after the camera has gotten as close to focus as it can should allow the camera to come to a sharp focus. I find that I get the best results if I adjust focus a little beyond what looks sharp, that gives the camera some latitude to come to sharp focus. Also, since you are using the camera auto-focus again after you make your scope focus adjustment the focus is less critical compared to manual focus. I know that it is counterintuitive that you should change your scopes focus from what looks sharp to you visually, try it and let me know how it works for you. Good luck, Mike [/QUOTE]
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Camera focussing problems
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