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Infrared black and white photography
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<blockquote data-quote="gmaronson" data-source="post: 50709" data-attributes="member: 8791"><p>It's become an important part of my photographic repertoire on the ground. Now that I'm beginning to fly my Spark, I am anxious to able to continue this from an aerial perspective. I can explain the technical stuff another time, but here's my problem. In order to just let just infrared rays come through the lens, I need to have a VERY dark red filter over it. I figured out how to cut down a full size filter so it'll fit over Spark's lens, but my early results were disappointing. Whatever I did, I got a bright round area right in the middle of the image every time. I got the same result when I tried various shades of orange, but other medium and dark colors didn't do that.</p><p>In this type of photography, sunlit green foliage turns white and blue skies can turn almost black. It's an interesting variant on regular black and white.</p><p>Anybody have a clue as to what's happening? It may not be fixable, but I'd like to know why!</p><p>The attached example isn't very exciting, but it illustrates the white leaves and near-black sky, and, unfortunately, the bright area in the middle of the frame. This effect doesn't happen with colors other than red and orange--at least as far as I've tested things.[ATTACH=full]5077[/ATTACH]</p></blockquote><p></p>
[QUOTE="gmaronson, post: 50709, member: 8791"] It's become an important part of my photographic repertoire on the ground. Now that I'm beginning to fly my Spark, I am anxious to able to continue this from an aerial perspective. I can explain the technical stuff another time, but here's my problem. In order to just let just infrared rays come through the lens, I need to have a VERY dark red filter over it. I figured out how to cut down a full size filter so it'll fit over Spark's lens, but my early results were disappointing. Whatever I did, I got a bright round area right in the middle of the image every time. I got the same result when I tried various shades of orange, but other medium and dark colors didn't do that. In this type of photography, sunlit green foliage turns white and blue skies can turn almost black. It's an interesting variant on regular black and white. Anybody have a clue as to what's happening? It may not be fixable, but I'd like to know why! The attached example isn't very exciting, but it illustrates the white leaves and near-black sky, and, unfortunately, the bright area in the middle of the frame. This effect doesn't happen with colors other than red and orange--at least as far as I've tested things.[ATTACH=full]5077[/ATTACH] [/QUOTE]
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Infrared black and white photography