john_mcdonald Posted April 29, 2003 Share Posted April 29, 2003 I have a few Fidelity 8x10 holders. Today as I pulled a dark slide, I noticed that a holder had a convex cupping across its width at the end where the slide enters. I sighted across all of my Fidelity holders, and was surprised to find that they all had a pronounced cupping. No problems or light leaks at all, but I was just curious if others have noticed this feature�perhaps it is inherent to the design. I suppose the springs of the camera back flatten the cupping when the holder is in the camera to make the opening light tight. Link to comment Share on other sites More sharing options...
michael_kadillak6 Posted April 30, 2003 Share Posted April 30, 2003 I pulled out a new double box of 8x10 Fidelity holders to check them and they do have a slight outward "cupping" in the portion that accepts the darkslide. Squeeze on the outside of the holder against the high center of this cup and you will see how little applied pressure allows it to return to center. Like you commented, I have to believe that this was designed purposefully to be affected by the spring back of the camera once the holder is inserted. No big deal. Link to comment Share on other sites More sharing options...
roger hein Posted April 30, 2003 Share Posted April 30, 2003 John, As Michael said - no big deal as long as the holder is 'light tight' the camera springs should take up the slack. I've had some pretty old holders and find the 8x10 plastic ones always have that 'bend'. I've noticed even 5x7s have an ever so slight bow to them. Cheers, Roger... Link to comment Share on other sites More sharing options...
david_goldfarb Posted April 30, 2003 Share Posted April 30, 2003 If it does become a problem (and I have Fidelity holders, and it's not a problem for me), I've seen some holders that have an interesting modification to prevent this. The owner had a channel routed into the holder at the lock-rib end and a metal strip screwed in on each side to keep the light trap perfectly flat. Link to comment Share on other sites More sharing options...
tracy_storer1 Posted April 30, 2003 Share Posted April 30, 2003 Yes, this is "normal." The lighttrap that protects the darkslide slot is a long fabric covered spring, the pressure of this spring pushes against the front plate of the holder causing BOWING in the middle. ("cupping" would describe a concavity) In VERY large holders this is a cause for concern, because the darkslide springs are not always strong enough to flatten the holder against the back of the camera. Link to comment Share on other sites More sharing options...
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