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General Photography
Wild Life
Bird photography,lens,subject size,crop and working distance for beginers
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<blockquote data-quote="aroy" data-source="post: 507945" data-attributes="member: 16090"><p>A 300mm lens has 5.33 degree FOV for DX</p><p>A 500mm lens has 3.16 degree FOV for DX</p><p></p><p>Which gives us 0.87 feet width for 300mm and 0.52 feet width at 500mm. (W = R x Theta). 500mm is 1.67 times less in width (or same in magnification)</p><p></p><p>OT. The bird is around 1/9 the full width so either it is 1 inch long, or most probably the distance is more like 30 feet</p></blockquote><p></p>
[QUOTE="aroy, post: 507945, member: 16090"] A 300mm lens has 5.33 degree FOV for DX A 500mm lens has 3.16 degree FOV for DX Which gives us 0.87 feet width for 300mm and 0.52 feet width at 500mm. (W = R x Theta). 500mm is 1.67 times less in width (or same in magnification) OT. The bird is around 1/9 the full width so either it is 1 inch long, or most probably the distance is more like 30 feet [/QUOTE]
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General Photography
Wild Life
Bird photography,lens,subject size,crop and working distance for beginers
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