Light Leak During Development

I have a question regarding my Minox C and my first pictures

that I have recently developed using it. I shot a roll of minopan 400 purchased from MPL (36 exp.) and given the recent delay in processing B&W at the lab I attempted to develop myself using a Minox 50exp tank and Rodinal at the suggested times for AGFApan 400. The pictures look

like they turned out well except for small patches of overexposure (dark lines on the negative) at equal intervals along the entire top strip at the edge. They barely interfere with the picture but they are disturbing. Could this be an indication of a misalignment with the C? I should also mention that I did use your suggested technique for mid roll changing with this roll. Thank you for your help.

Tim, I never encounter this before. Black patches on negative indicate light leak.

I could happen during handling of the film, or during development (like loose development tank cap )

I suggest you develop a few more rolls, using slower film, such as ASA 100, and see whether the problem persist.

Tim, I recently experienced exactly the same problem as you. I have

developed many rolls in the tank, and became a bit confused. After

many tries I was able to recreate the problem. Sometimes when I just

need to develop film I load the tank in my bathroom, on a very white

table with two halogen spots above. Each time I do this I have this

problem with overexposed edges. Somehow the light gets inside the

tank. I have no problems when I load the tank elsewhere.

<p>

/Anders

Anders you are ont to something.

<p> You remind me, I encounter once similar light leak from Minox daylight

development tank.

<p> It is nothing wrong with the Minox tank. <p>Perhaps it has something to

do with how you fill the tank, and the light directly abour the tank.

<p> If you fill the Minox tank to the full, and if there is a

bright light bulb on top, I think some light may enter the interior

of the Minox tank througth multiple refraction from the liquid

which fills the groves between the cap and the center well.

the liquid here is directly connected to the top of the film

area, if you over turned the center spiral.

<p> Hence, turn the spiral until the lock key just locked

no more.

<p> Avoid strong light directly on top of the tank.

Good points! Actually, in the past I've had similar problems with

prints from "daylight" tanks and occasionally with roll film and no

cap on tank. Diffuse and dim light conditions work better for loading

& unloading cameras, too.