I have use a Toyo GII for years and it has a fresnel attached to the ground glass with two black clamps so they form a "sandwich". The G-series along with most Toyo view cameras come with fresnel from the factory.
Some months ago I got my hands on a very low priced Toyo 45CF field camera that does not have a fresnel on the ground glass. Since I have used the CF most of the time lately (long outdoors trips) I wondered the other day if I just could move the whole gorundglass/fresnel "sandwich" from The GII over yo the CF. It was done in 5 minutes and I was very happy with the bright ground glass on my light field camera.
Until 10 minutes ago. I read a chapter in Leslie Stroebels "View camera technique" about fresnels (page 257 if anyone has any interest). He says that on some backs you will experience a focus shift equal the width of the fresnel, and the focusing surface will no longer be in the film plane.
This made me seriosly worried. Am I in big trouble here? I have made 12-15 exposures after the switch, but I have not developed them yet.
Eirik
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