Test procedure / set-up - Printable Version +- Opticallimits (https://forum.opticallimits.com) +-- Forum: Forums (https://forum.opticallimits.com/forumdisplay.php?fid=4) +--- Forum: Just Talk (https://forum.opticallimits.com/forumdisplay.php?fid=17) +--- Thread: Test procedure / set-up (/showthread.php?tid=970) |
Test procedure / set-up - Seymour - 12-09-2015 Hi, I was wondering: Could you one of these days share a few points about your lens test set-up? Specifically, how do you go about aligning the camera perpendicularly toward the test targets? Test procedure / set-up - dave9t5 - 12-09-2015 Quote:Hi, Have you read this?: http://www.opticallimits.com/Reviews/lens-test-faq Test procedure / set-up - Seymour - 12-10-2015 Of course I have. However, it just stresses how essential it is to have a perpendicular set-up without going into much detail about how to achieve one ;-) I couldn't believe the step with "a couple of sample shots at f/11" was all there was to be said about it. I figured they might be use some sort of custom-made rail or something. Or, I don't know, distance measurement. For instance, although this might not be a helpful comparison, if you try to achieve a precise angle on a lathe, what you use is a dial indicator. Test procedure / set-up - Klaus - 12-10-2015 Actually the setup doesn't need to be 100% accurate. But the exact details of the test procedure aren't open source. We prefer to keep a little magic B) |