problems with my lens
Posted 18 October 2011 - 06:24 PM
here are a few shots where you can see it best.
Posted 18 October 2011 - 11:49 PM
Posted 19 October 2011 - 03:21 AM
Is the turret seated in the right position?
That was my first thought too. Hard to check now though... So if you can recreate the effect looking through the finder. Your Bolex is a Reflex, right?
Posted 19 October 2011 - 10:21 AM
You could try removing the filter holder. Then flip the turret around so that you can get at the prism block. Pull out the prism so you can look directly through the aperture plate to the film plane. Release the spring tension by running the camera until it stops. Push in the stop/start button to the locked-on position. Slowly move the movement by turning the film sprocket gears by hand until you have a clear view through to the aperture plate. You should have a clear optical path. Look for a film chip somewhere, blocking the light path top-left, (shows on image bottom-right). Check that the prism block is clean and not chipped.
Posted 19 October 2011 - 05:04 PM
I was thinking film chip too at first but the "reflects light when hit directly" line and the fact it only occurred with the 10mm made me think again.
It's a classic turret camera problem, led to some interesting camera designs to overcome it like the diverging turret and Bell and Howell's Spider Eyemo:
Posted 19 October 2011 - 05:09 PM
Posted 19 October 2011 - 08:44 PM