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Newer lenses that fit nicely in a 23 Crown / Century

 
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Velostiraptar



Joined: 20 Jul 2020
Posts: 6

PostPosted: Sat Aug 01, 2020 12:37 am    Post subject: Newer lenses that fit nicely in a 23 Crown / Century Reply with quote

There is an abundance of 105/5.6 lenses out there. Perhaps sadly, way more common than 100/101/105 Ektars in good condition.

Will the 105/5.6 Fujinon W and Nikon W lenses actually fit into a 23 Crown and allow it to close? What about the Rodenstock Sironar N 100/5.6?

I figure a skilled tech (who I fortunately have access to) can calibrate the Kalart RF to one of these exotic lenses. Is it similarly possible to do so for the scale on the focusing rail?
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45PSS



Joined: 28 Sep 2001
Posts: 3860
Location: Mid Peninsula, Ca.

PostPosted: Sat Aug 01, 2020 5:28 am    Post subject: Reply with quote

The scale on the bed was cut for a specific lens. Any lens that optically measures the same as the one the scale was cut for will match. Any lens that has the same nominal focal length as the one it was cut for will vary at close distances depending on the difference between the nominal and optical values.
There is a number on the back side of each the bed and rail sections of the focus scale. This list is for the bed section http://www.southbristolviews.com/pics/Graphic/manual-pdf/Grafscalst.gif and the rail section is matched to it but there is no record available for the match or rail part. A decimal point is assumed to be in the variance between the digits.
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Dan Fromm



Joined: 14 May 2001
Posts: 2054
Location: New Jersey

PostPosted: Sat Aug 01, 2020 1:25 pm    Post subject: Reply with quote

I've tried the 105/5.6 Fujinon-W. It fits.
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