Where is the light leak?

[atlcruiser]

Hi All,
I just looked a few frames from last week and found some light leaks. Both are from different holders. I checked the holders and they seem fine....
My thought is that this is definitely a holder issue at the light trap with the darkslide but it also occurred to me that it might be the holder is not being pressed tight against the back. This is a deardorff 810 with a original spring back. Both holders are newer lisco that i have never had an issue with before.

First negative it is hard to see but the leak is in the middle on the right hand side. What is interesting is that I flipped the holder and took a second exposure of the same scene. Same sort of leak in a slightly different spot. Makes me think not sealing well to the back of the camera.




0312 BW 810 14.jpg by urbanlandcruiser, on Flickr


2nd negative it is obvious! This looks more like a holder light trap issue


0312 BW 810 12.jpg by urbanlandcruiser, on Flickr


thanks in advance

[Leigh]

Yep, the second one is obvious. That end of the holder was up when you took the photo, with direct sun on it.

I always leave the dark cloth over the holder when shooting, to avoid such problems.

No suggestions regarding the first issue.

- Leigh

[vinny]

just adding to what leigh said, the only leaks I've had in holders was from the light trap end when vertical. if you pull the slide and look towards the trap with your eye against the flap end, you can often see right through in a tiny spot. I've only had the issue with 4x5's but with many.

[atlcruiser]

Thanks....I did not inspect the light trap end very well. I am anal about using the dark cloth but I might have missed it this time

[E. von Hoegh]

As an FYI, I use old Kodak/Folmer&Schwing 8x10 holders, initially because they were cheap, but I've retained the good ones and got rid of the modern all plastic ones because the light traps on the wooden Kodaks can be disassembled to renew the velvet (and remove the dust).