I've posted on this subject before, but now I have the tool to supply some inter esting information. A large aerospece engineering firm, who owned me some favors just built me a device to accurately measure film holder flange depth. They too k a dial centering gage, mounted it in an 8" milled SS bar, with an adjustment s et screw, and a check gage for exactly .197".....the standard for film holder fl ange to focal plane depth. It is accurate to .0001! I have done prelimary checks on a few of my 52, 4 X 5" holders. I will report to the LF board on my survey. The majority of my holders are Riteway, (new - old style) some Fidelity, and ele ven new-in-the-box Linhof. Just a teaser until I complete the survey. Most Ritew ay check OK +/- within the .007 tolerance, but vary considerably. The Linhofs ar e within that tolerance of .007" and fluctuate very little, but 'deeper'in overa ll depth.. I'll get back to you all in a week with the total survey. (:-)
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