FLPHOTO Senior Member 315 posts Likes: 1 Joined Nov 2008 Location: Florida More info | Jul 30, 2010 19:40 | #1 I'm testing a new lens and have found that going to the negative extreme (-20) has very little affect from 0 while the other extreme (+20) has a great impact. Is this common? I should note that the lens seems just about perfect at 0 so it's not a problem. I just found it odd that one end of the scale shows next to no change from neutral. --- www.davidpugsleyphoto.com
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MikeJohn Member 109 posts Joined May 2010 Location: Cleveland USA More info | Jul 30, 2010 20:12 | #2 Makes no sense to me. If I have a lens that is perfect at zero, any move from there plus or minus changes the focus plane. Sony RX100, Canon S90, 1DMKIV, 5D MKIII, 16-35 II, 24-105, 70-200 II, 100-400, 300 f2.8, 1.4x III, 580EXII
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NinetyEight "Banned for life"  More info | Jul 31, 2010 05:31 | #3 Is it at or near it's minimum focusing distance? The - action will 'pull' the point of focus towards you and you may not notice it so much?? Kev
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Jul 31, 2010 11:21 | #4 I was at 7.63m and MFD is 4.5m so it was relatively close. I should note this is a 500 f/4. --- www.davidpugsleyphoto.com
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