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Old 29th July 2022, 05:51 PM
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Reinhold Reinhold is offline
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Join Date: Jan 2014
Location: Pacific NorthWest
Posts: 65
Default Meniscus Lens on Horseman 45FA

A customer in Australia asked for a Wollaston soft focus meniscus lens for his 4x5 Horseman FA.
But the small 80x80mm lensboard and short bellows draw on the camera limited his options to either a 100mm or 125mm lens.
(My 250mm lens would “max out” the bellows draw).
Here's the camera...
http://www.film-and-darkroom-user.or...1&d=1659116620
The lensboard is 80mm square.
Wollaston lens barrels are 73mm diameter.
A lens flange would be too big for that 80mm lensboard. Hmmm…

After a bunch of emails I sketched out a concept…
http://www.film-and-darkroom-user.or...1&d=1659116620

Instead of a flange or a retaining ring, I re-designed an axial screw mount…
The 73mm barrel leaves space for the board’s retaining clip and clamp.
http://www.film-and-darkroom-user.or...1&d=1659116620

Felt strips seal the voids between the register buttons on the 45FA’s corners.
http://www.film-and-darkroom-user.or...1&d=1659116620
A 62mm snap-in lens cap closes that cavernous hole…

A black elastic band snugs against the aperture card to seal out hard sunlight.
http://www.film-and-darkroom-user.or...1&d=1659116620
I’m told this would also fit the baby 6x9 VH Horseman…
( My 100mm f:1.8 would be nice on 6x9 format )

That was a fun project…
Reinhold

From my shop... https://www.re-inventedphotoequip.com/Home.html
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