PDA

View Full Version : Gran View...Getting Closer



dazedgonebye
13-May-2009, 19:01
Well, I managed to eliminate/reduce the massive light leak/reflected light that caused my big white tunnel effect. http://www.largeformatphotography.info/forum/showthread.php?t=48802&highlight=gran+view

Now I'm still having a bit of a problem. Any ideas what that dark ring is about?

Excuse the crappy picture. I'm just pointing it to test.

http://farm3.static.flickr.com/2017/3529302041_6ba9a62f0f_o.jpg

Gene McCluney
13-May-2009, 19:12
What was the source of your previous massive light leak???

This looks like the normal vignetting of the ultra-wide lens..perhaps exaggerated by your scanner?

Gem Singer
13-May-2009, 19:49
Perhaps you used a polarizing filter?

Two interesting blue squiggle lines running from the upper right side to the middle of the picture. Scanning error?

dazedgonebye
13-May-2009, 19:53
The light leak was my shoddy job of mounting a copal 0 lens to a copal 1 helical. On top of that, the flat black paint I used on the inside of the camera wasn't very flat.

No polarizing filter. The blue lines I placed there to show the area I am concerned about.

If it were just light fall off, it should get darker to the corners instead of just having a dark semicircle...right?

dazedgonebye
13-May-2009, 19:55
The sun was pretty much to the left of me. Could the darkness be internal reflections in the lens?

Gem Singer
13-May-2009, 20:14
Did you use any type of filter?

dazedgonebye
13-May-2009, 20:15
Did you use any type of filter?

No, no filter.

venchka
13-May-2009, 20:45
Grasping at straws. How did you develop the negative? Alone? With other film? I'm wondering if this sheet and another sheet got too close during development.

dazedgonebye
13-May-2009, 21:08
Just one sheet in the jobo.

isaacc7
13-May-2009, 21:21
Hmmm, mottled skies are a classic sign of developing issues. Well, to be more precise, agitation issues. What developer did you use? Is it possible that it foamed up on you? Those blank skies are unforgiving...

venchka
13-May-2009, 21:38
How close is Area 51? :D :cool: Alien ship trail?

Lachlan 717
13-May-2009, 22:21
The curve roughly equates to the curve of the building. As the building facia seems quite reflective, could this be some weird flaring issue (weird as it is darkening rather than brightening)?

dazedgonebye
13-May-2009, 22:54
Hmmm, mottled skies are a classic sign of developing issues. Well, to be more precise, agitation issues. What developer did you use? Is it possible that it foamed up on you? Those blank skies are unforgiving...

Barry Thornton's 2-bath formula.
Agitation was constant with a jobo drum and unicolor roller.