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DPChallenge Forums >> Tips, Tricks, and Q&A >> Magnification
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10/07/2003 02:42:49 PM · #1
I've tried magnification filters, I have a full set 4x,2x and 1x, plus I went out and bought a 3.5" magnifying glass, but the camera seems to "look through" the lens and not really magnify the subject (to the extent I believe it should). I've contacted Sony, but no reponse.
Any ideas/suggestions? (I've tried both auto and manual focus, macro mode and not) It refuses to focus on the magnifying glass, period.
10/07/2003 03:16:11 PM · #2
I'll relay my experience - can't vouch for the technical accuracy. :)

They only magnify a small amount, though they do magnify some. You can tell this simply by looking through them with your eye. Here's a test I did once before when this question came up:

No filters
+3 Diopter
+7 Diopter

These were all taken on a tripod, no changes in focal length.

However, for me (and my camera), the biggest benefits I get from them is 1) I can focus on objects much closer to the camera (2 inches with +7 vs. 6-7 inches with none), and 2) the ability to get a narrower DOF, and therefore get a bettr blurred background on macro shots.

From what I understand, with the 717 you already have the ability to focus up close, and with aperature control probably have more control over DOF than I do. So you may not have as much, if any, need for them. I know Buzzrock was mentioning on another forum that he was having the same problem as you with them on his 717 - he wasn't seeing much benefit. I don't know if he ever found a use for them, or a way to get something out of them.

Message edited by author 2003-10-07 15:16:28.
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