Originally Posted by
Bernice Loui
Aftermarket fresnel is not gonna work with the OEM Sinar ground glass. The Sinar fresnel clips in at the long end of the viewing side of the GG.
There should be no shims with the Sinar OEM ground glass to it's seating surface. Direct fit to the precision machined flats with the clips held in place by screws.
Have OEM Sinar frensel for both 4x5 & 5x7 when these cameras were purchased used. They were the first item to be removed before the camera was check and prepped for being used. Over the decades, just never found the fresnel to be much of a focusing aid. It tends to be a focusing and viewing impediment with wide angle lenses.
The far more important GG focusing tool is a loupe.
Bernice
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