Today’s image isn’t taken with a common camera lens. Instead, it’s taken with a projector lens (slide projector) made by Meyer Optik located in Görlitz (then G.D.R, now FRG): Pentacon 100/2.8. It’s a complete manual lens: fixed aperture of f/2.8, fixed length of 100mm, manual focus by screwing the front-lens in and out. The lens holder can be removed, so the length of the tube limits the minimum distance.
Currently I don’t have much time, so I was able to spend only a few minutes for testing the lens. But, I’m looking forward to test it extensive soon. It’s considered as a bokeh monster.
The lens module sticks inside a tube. Inside the tube you can move it forward and backwards and you can screw it in and out for focussing. But, you can also pull it out of the tube. On the backside of the tube (opposite to the lens module) one has attached a minimum part of a bayonet. So, I can mount it on front of my camera. Although, I don’t have an aperture inside the lens and the focussing has to be done manually, I can use it quite normal. The light-meter works fine. Thus I can use my camera as always: in A Mode. Instead of dialing in an aperture, I have the fixed aperture of f/2.8 and the camera finds the correct shutter-speeds based on the ISO value.
Focussing is done by moving the lens module inside the tube. Now, the focus has to be fine tuned by modifying the distance between camera and subject.
This is my contribution to Monochrome Madness organized by Leanne Cole. Look at here site on Thursday (Australian time), to see many more monochrome images created by many other talented photographers from all over the world.
I’d also encourage you to participate. The conditions are published in each of her Monochrome Madness posts.