Hi
My Nikkor-m 300mm F9 seems little too soft compared to 75mm grandagon-n and 210mm apo-sironar-n. Is there any place that can re-calibrate the lens?
OR just my expectation is too high.
Thanks
Hi
My Nikkor-m 300mm F9 seems little too soft compared to 75mm grandagon-n and 210mm apo-sironar-n. Is there any place that can re-calibrate the lens?
OR just my expectation is too high.
Thanks
You could start by defining "re-calibrate".
Are we talking about the distance between the front and rear groups of elements? Over the years I've come across a few (3) optics mounted in shutters that projected mediocre images. In those three cases the distance was more than it should have been and I'm talking in a couple of mm's.
Last edited by Leigh; 7-Dec-2017 at 11:23.
If you believe you can, or you believe you can't... you're right.
25.4mm per inch..
2mm / 25.4 = 0.07874 inch.
Bernice
I had a similar problem with my Nikkor M 300mm when I first got it. After a bit of examination I determined that the lensboard I had it mounted on was preventing the rear element from seating all the way into the shutter barrel. A bit of woodworking fixed the problem and the lens performed spectacularly thereafter. Maybe you have a similar issue?
Best,
Doremus
You can send the lens to a shop like SKG and have them check the alignment. I've done that with the number of my lenses
The machined leader block on LTO tape drives was held to around 5 micron tolerances. At one point it was costing $13 for a piece of Delrin about half the size of your thumbnail. Finally after only 5 - 10 years of trying we were able to hold tolerance in a molded version.
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