Hi,
I made my first shots with a speed graphic. Unfortunately I discoverd 2 vertical lines on my processed sheet. They are at 1cm from each border. The sheet was not correctly inserted. The emulsion was at the wrong side. Would that be the reason? It was a Ilford delta 100 sheet. Some say it the lens board. Other say it's the holder? Couls somebody help me?
http://photo.net/photodb/photo?photo_id=11165316

You've got some irregular dense area near the light trap as well (right side). Without seeing your set up with the film holder and dev tanks, it's hard to say, but I have to wonder if it isn't a processing error.

It can't be the lens board.

Dear Compatriot 8),
Since you put the sheet the wrong way, it is irrelevant to guess what happened.
Do another pic with the sheet correctly inserted and tell us.
Cheers.
G

Thank you guys! I'll start doing it the right way and w'ell see

Dear all,
I loaded the sheet in the right way... but then again, those lines appear. . Does any one have an idea?

http://photo.net/photodb/photo?photo_id=11662259

Pierre

How was the film processed?

hey Pierre
HOW BLACK is the inside of your camera some times if
you have some thing shinney on the inside you can get a
Ghost Reflection ! get out some flat black pant & go to work
on any thing shinney!
banjo

This is what I thought too.
The lines are much too thin to be a bellows/holder light leak IMHO.

45PSS wrote:

How was the film processed?

It couldn't be a processing problem. Both sheets were processed by different persons.

Different film holders also? Same lens/shutter?

The lines seem too consistent to be reflections but I cannot rule that out either. In a darkroom with the light off, the focus panel removed, bellows fully extended and the or one of the lens/shutter used in the questionable photos attached put a 2 AA cell mini mag flash light or similar inside the bellows and look for light coming from around the shutter and or lens board. Next remove the lens board and reinstall the focus panel, install a film holder, retract the bellows only enough to easily shine the flash light around the edges of the back and film holder and check for any hint of light coming from around the back or film holder. Weak light leaks will look like dim yellow dots or streaks, strong ones will look white.

I have had pin holes in bellows put secondary exposures on the film. Light leaks do not always cause flair like streaks.

Dear collegues,

I think I found the reason of those vertical lines on the sheets. I used another lens and the lines didn't appear. They might have been some sort of reflection of the camera's rail through the lens I used.

Thank you all for your inputs in that difficult question.