Lubitel Mysteries

So I've reverted to using a Lubitel to feed the rollfilm habit.

Light leaks. Sub-optimal lenses. questionable focusing.

However, the most mysterious thing: the top 1/3 of the frame is
massively underexposed--by as much as a stop, and I can't think why it
would be so.

Examples:

http://members.cox.net/luigi12081/Im...airfax/Fairfax Police
Motorcycle.jpg/

http://members.cox.net/luigi12081/Im...airfax/Fairfax cannon.jpg

Theories?


-Luigi

www.livejournal.com/users/ouij
Blog. With photos. Comments welcome.

"Luigi de Guzman" wrote...
So I've reverted to using a Lubitel to feed the rollfilm habit.

Light leaks. Sub-optimal lenses. questionable focusing.

However, the most mysterious thing: the top 1/3 of the frame is
massively underexposed--by as much as a stop, and I can't think why it
would be so.

Examples:

http://members.cox.net/luigi12081/Im...airfax/Fairfax Police
Motorcycle.jpg/

http://members.cox.net/luigi12081/Im...airfax/Fairfax cannon.jpg

Theories?

I got no theory, but just two notes: first of all, when you get to
look at the camera, it's the bottom of the film frame (what you see
at the top of the print is actually at the bottom of the frame, the
film is feed "upside down", or, IOW, the picture inside the camera
is inverted) and second, it's _over_exposed, not underexposed. It
is the lighter part you're talking about, yes?

Just $0.04

Luigi de Guzman wrote:
So I've reverted to using a Lubitel to feed the rollfilm habit.

Light leaks. Sub-optimal lenses. questionable focusing.

Mine's not that bad. Not that great either, but pretty much trouble
free.

However, the most mysterious thing: the top 1/3 of the frame is
massively underexposed--by as much as a stop, and I can't think why it
would be so.

It looks like a band of overexposure. Is part of the inside of the
camera shiny where is should be matte black? If there is a shiny
area on the bottom inside of your camera you would get something
very similar to what I'm seeing in your pictures.

If this is the case, then flocking paper or matte paint should fix it.

Peter.
--

On Mon, 9 Feb 2004 05:23:48 +0000 (UTC), Peter Irwin
wrote:

Luigi de Guzman wrote:
So I've reverted to using a Lubitel to feed the rollfilm habit.

Light leaks. Sub-optimal lenses. questionable focusing.

Mine's not that bad. Not that great either, but pretty much trouble
free.

However, the most mysterious thing: the top 1/3 of the frame is
massively underexposed--by as much as a stop, and I can't think why it
would be so.

It looks like a band of overexposure. Is part of the inside of the
camera shiny where is should be matte black? If there is a shiny
area on the bottom inside of your camera you would get something
very similar to what I'm seeing in your pictures.

If this is the case, then flocking paper or matte paint should fix it.

Peter.

Overexposure it is. yes, correct.

*slaps himself*

h'mm. haven't checked internal reflectivity yet. suggestions on how
to paint the interior?

"Luigi de Guzman" wrote...
[...]
h'mm. haven't checked internal reflectivity yet. suggestions on how
to paint the interior?

You could use matte black paint found in all hobby stores, but make
sure to use a very thin layer. Better yet, don't paint, but take
a very fine sandpaper to the existing paint and dull it (very light
pressure is needed, don't strip it)

V

In article ,
Luigi de Guzman wrote:
h'mm. haven't checked internal reflectivity yet. suggestions on how
to paint the interior?

You could either use Krylon Ultra Flat Black spray paint (but
carefully mask the lens first) or get some black flocking paper with a
self adhesive backing. The flocking paper is probably better.

--
Brian Reynolds | "But in the new approach, as you know,
| the important thing is to understand
http://www.panix.com/~reynolds/ | what you're doing rather than to get
NAR# 54438 | the right answer." -- Tom Lehrer