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<blockquote data-quote="Eyelight" data-source="post: 307189" data-attributes="member: 24753">This is what I learned today.Trying to come up with an easy way to explore the depth of field on the 55-200mm, so I set up the D3200 on a tripod aimed at the 10' mark on a tape measure. Using mode A and taking a shot at each aperture setting. Rotated and cropped each shot and added the aperture setting and DOF calculations below each image. If you enlarge the jpeg and scroll up and down, you can see the DOF on the tape at different settings.&nbsp; The blur is easiest to detect in the fraction marks along the edge of the tape. &nbsp;&nbsp; The center appears to go soft around f/22-25, which I know everyone wants to call it diffraction, but it is probably just the normal loss due to the nature of economical glass.&nbsp; &nbsp;&nbsp; &nbsp; I was using manual focus and as you can see missed it by 5”.&nbsp; After this I discovered the rangefinder, and hit three successive focus points, so learned something else today.First shot is as seen by the camera.&nbsp; The rest are rotated a cropped for ease of viewing.&nbsp; What all this does for me is gives me a picture to save in my mind of how the DOF works on this lens at this distance and then think deeper DOF as the distance increases and shallower DOF as the distance decreases.What did you learn today?Just thought of the next thing to scope out.[ATTACH]89332[/ATTACH][ATTACH]89333[/ATTACH]</blockquote>

[QUOTE="Eyelight, post: 307189, member: 24753"] This is what I learned today. Trying to come up with an easy way to explore the depth of field on the 55-200mm, so I set up the D3200 on a tripod aimed at the 10' mark on a tape measure. Using mode A and taking a shot at each aperture setting. Rotated and cropped each shot and added the aperture setting and DOF calculations below each image. If you enlarge the jpeg and scroll up and down, you can see the DOF on the tape at different settings. The blur is easiest to detect in the fraction marks along the edge of the tape. The center appears to go soft around f/22-25, which I know everyone wants to call it diffraction, but it is probably just the normal loss due to the nature of economical glass. I was using manual focus and as you can see missed it by 5”. After this I discovered the rangefinder, and hit three successive focus points, so learned something else today. First shot is as seen by the camera. The rest are rotated a cropped for ease of viewing. What all this does for me is gives me a picture to save in my mind of how the DOF works on this lens at this distance and then think deeper DOF as the distance increases and shallower DOF as the distance decreases. What did you learn today? Just thought of the next thing to scope out. [ATTACH=CONFIG]89332._xfImport[/ATTACH] [ATTACH=CONFIG]89333._xfImport[/ATTACH] [/QUOTE]

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