Where do I have to trim the flocking for my Lubitel?

[Forest_rain]

I'm trying to "perfect" my lubitel, I know this camera gets a bad rap but I'm trying to make it work 😉

See first picture, this is the back seen with the viewfinder at the top, looking through the lens from the back with the film door open. I used triple plush black velvet (highly recommended and tested from my research as being the best for removing interior reflections and improving contrast by telescope community)

I flocked the inside, but I'm getting fringing on images (see image 2 and 3).

Where do I need to trim? I don't know if/how the image is inverted and which sides are represented oriented with the first picture. It looks like the left side of images has a lot of fringing, top and bottom and have some. Lower left corner has a build up of flocking.

Also there is a light leak visible in the upper right corner of image 3, what's causing this? Which area of flocking cord on the film door do I need to check? It looks like the cords glued in the film door "grooves" are a little "crusty". Or maybe it's just the red window?

Also if I trim the interior flocking, will light reflect from the edge of the side without the flocking, so maybe I should paint those small sections with flat black paint when I trim the velvet flocking?

 

[Guest]

That stuff is way too shiny, just look at how it has lit up with flash. When you take an image with that stuff inside the light is going to be bouncing around inside.
It must be non reflective, get that stuff out and rethink your problem.

 

[retinax]

I'm not sure if what happens with flash is indicative of what happens during exposure, I think it may be good enough, or at least good enough to warrant another test film. With regard to what part is in the way, all you need to know is that light travels in a straight line (for present intents and purposes). Use your eyes or a ruler or something to find out where the stuff is between the lens and the film.

 

[davidnewtonguitars]

Flat black paint will do a good job and is much less thick than velvet.

 

[mpaniagua]

Flat black paint will do a good job and is much less thick than velvet.

Agree with that. Velvet similar materials can be used as light seals for leak, but I think paint will do a better job for flocking. Rolleiflex uses black flat paint as well.

Marcelo