Serious Problem with negs

[Markok765]

The corners are cut off! i did tri-x in rodinal 1:50 25 min agitation every5 min. the negs look beter at the start of the roll.
What is this problem?
Look at the attached file:
In patterson tank and reel.
Ps in photoshop 7 how can you reverse it so the neg shows up as positive?

 

[Amund]

Ctrl+I for inverting.

 

[Kino]

It is called vignetting. Got a lens shade on that is a bit too small? What camera, lens combo did you use?

 

[Thomas Bertilsson]

Did you use a lens shade? Or a couple of filters threaded into one another? If so, you could see some shading. I've had that happen to me, but not with such a distinctive edge.

- Thom

 

[Markok765]

yes, but it was a new rubber shade that coused no viggeting. it was a takumar 35mm 3.5 withhoya uv0 filter and a lens shade that caused no vingetting in the viewfinder

 

[Markok765]

it is not viggeting! on some of the negs it is like this, but the corner is like a very thin neg, also vingetting would be rounded edges

 

[Neal]

Dear Marko,

Few 35mm slr viewfinders show 100% of the recorded image.

 

[Jim Jones]

Vignetting may not be apparent in the viewfinder when the lens is wide open for focusing, but can appear when the lens is stopped down for the exposure.

 

[Markok765]

Dear Marko,

Few 35mm slr viewfinders show 100% of the recorded image.

yes, butyou can still see the corner, its like an extremely thin neg. and vingetting woulf be curcular, not straignt

 

[Markok765]

Vignetting may not be apparent in the viewfinder when the lens is wide open for focusing, but can appear when the lens is stopped down for the exposure.

I actually had the lens auto\manual switch on manual the whole time

 

[Michel Hardy-Vallée]

yes, but it was a new rubber shade that coused no viggeting. it was a takumar 35mm 3.5 withhoya uv0 filter and a lens shade that caused no vingetting in the viewfinder

If you used a normal lens hood, those are designed for 50mm focal lengths. On top of that, you use a filter, and on a wide angle lens, filter + hood is a recipe for vignetting. Your neg is definitely vignetted.

 

[Thomas Bertilsson]

yes, but it was a new rubber shade that coused no viggeting. it was a takumar 35mm 3.5 withhoya uv0 filter and a lens shade that caused no vingetting in the viewfinder

As has been said a couple of times here, few slr's and rangefinders display everything the lens records. Wide angle lens with a shade AND a filter can definitely cause vignetting. I've had that happen to me. How else could you possibly explain this phenomenon? It's not like chemistry can have intelligence and develop only select parts of your negative to full strength and just leave the corners out.

- Thom

 

[dustym]

I had the exact problem over a year ago its vingnetting mine was caused with a cokin hood on a 28mm lens

rgds
Dusty

 

[Markok765]

yea i think this is what happened, becaude the first 10 frames, taken with my p&s with the 28mm were fine, and the slr ones were bad

 

[Markok765]

heres another shot:

 

[lee]

take the lens hood and any filters off and see what happens.

lee\c

 

[Markok765]

i dont see the vingetting in the virefinder

 

[Dave Parker]

i dont see the vingetting in the virefinder

Thats because your viewfinder is not a 100% viewfinder, in other words your not seeing everything the lens is seeing..

Dave

 

[Markok765]

update! i put the hood on and there is a tiny amount of viggeting!

 

[Kino]

No big deal; A tiny bit of cropping will fix your problem and...

now you know.