Graphic Back and Fresnel

[eSPhotos]

Hi all,

I am building a 4x5 camera using parts from old cameras.
The back I am going to use is a Graphic Back but it only has ground glass and no fresnel.
I bought a fresnel glass to suit but not sure if I have to put it in front (towards lens) or at the back of ground glass.
Can some one please help?

[Jim Jones]

Here is one brief discussion of Graphic backs and fresnels: http://graflex.org/articles/sanz-cervera/. Search this site for Graphic fresnel for many more discussions.

[eSPhotos]

Thanks Jim.

I don’t know what I was thinking ...
The back was working fine so all I have to do is place the fresnel lens at the back (towards me) of ground glass, duhhhh.

[snederhiser]

Hello;
My 4 x 5 Super Graphic came with a fresnel installed. Fresnel first with the lens side towards the back, then the ground glass frosted side on top of the fresnel. I checked the film plane to make sure the film spacing was correct. You may have to adjust the film spacing, Steven.

[eSPhotos]

Thanks Steven.
My Crown Graphic has the same setup as yours.
Yeah, my original question was a silly one because the light getting thru two media should be the same whether the fresnel lens is in front or at the back.
It's all good and now I am in my workshed ..