Film Holder Specifications



Film holder size 2x3 3x4 4x5 5x7 8x10 11x14 14x17
Depth to
film surface
0.197 +/- 0.007 0.197 +/- 0.007 0.197 +/- 0.007 0.228 +/- 0.010 0.260 +/- 0.016 0.332 +/- 0.016 0.320 +/-
0.016
Retaining Tab
Location
3.968 4.859 5.562 7.661 10.850 16.160 19.288
Thickness 0.520 0.520 0.520 0.562 0.594 0.790 0.686
Length 4.671 5.565 6.296 8.422 11.625 16.188 19.563
Width 3.109 4.000 4.765 5.906 9.322 13.000 16.000
Distance to
exposure field
0.650 0.650 0.650 0.697 0.775 1.255 1.043
Exposure height 3.338 4.228 5.002 7.010 10.026 14.086 17.062
Exposure width 2.163 3.131 3.882 4.850 7.850 10.188 13.806

(NOTE! The positioning of the ground glass is the most critical detail in the design. The focusing surface of the ground glass must be in the same position as the emulsion of the film when a film holder is inserted.)

To obtain a copy of the complete ANSI specifications for film holders,
visit the organizations home page and download file:
ANSI/PIMA IT3.108-1998
by clicking on the icon below!

gif
(small fee required for downloads from the ANSI site)

HOME

APPENDIX