Checking GG distance

[gbenaim]

Hi all,

I checked my GG to lb distance and compared it to the filmholder, and found the holder was 1mm deeper. I figured my back was built for a fresnel between the gg and lens, but wanted to double check here. You measure from the ground/inside part of the glass, right? Just thought I'd ask, thanks,

GB

 

[payral]

Yes for the mesure from the inside part of the glass, the part on the side to the lens, and you must have a sheet film in the holder.
If you get 1 mm difference is really too much, you should have the same distance.

 

[payral]

Jack East Jr. wrote a nice article about that in May/june 1999 edition of Photo Techniques. It was reprint in "Way Beyond Monochrome" by Ralph W. Lambrecht & Chris Woodhouse.

 

[Jim Jones]

The extra 1mm depth is approximately right for some plate holders, but not for a film holder.