| Author | Message | ||
     Jeffk Tinkerer Username: Jeffk Post Number: 85 Registered: 10-2011 Rating: N/A |
Note 100 microns is the thickness of 35 mm film, so that's the level of positioning tolerance of the lens relative to the film plane and of the focus screen relative to the lens that a camera manufacturer would want to aim for in order to maintain the ultimate sharpness and build a reputation. It would be challenging to verify this without special equipment including an autocollimator. If it seems way off, much more than this, then either something is grossly wrong or there's an error in the test - more likely the latter. ;-) |