mike_f5

Thank you, these answers helped me get it done today, unfortunately I dont own a SLR to use, so I had to go with the magnifier and scotch-tape with shutter on B. The tape was a challenge to get flat, but after that it went pretty well using a 4x KMZ magnifier.

Thank you all- good to finally get the little sonnar back to fighting shape.

Oh shoot! this is for digital?

I was using film only, sorry.

I used to do this alot a while back and it took a great deal of trial and error. It was a balancing act of many factors: ASA of film, exposure time, and lens opening, to get the effect you are looking for. So many other things show up in no time at all such as light-haze in the night sky.

I would suggest using black and white film starting out so you dont have the color sensitivity to deal with, however if you do go color use a light-polution filter to control ambient light from street lights or a nearby city.

Start with say a 15-minute exposure at f-8, take notes. Then do another 15 minute exposure at f-5.6 gradually opening the lens more.

After you get the film back and look at your notes, you can see where you attain the balance you are looking for: where you see the amount of star trails and color, but you also have contrast and good blacks. After a couple rolls of film you can make a chart, where the balance is good along the y axis lens opening and x axis exposure time for each film speed. After many nights experimenting, that is the most direct approach I've found. Sorry I don't have my chart anymore. Have fun, you will see some amazing discoveries.

I bought a really fine Rollei 35 S with a Sonnar 2.8/40 Rollei-HFT at a Thrift

store a year back, it wasnt selling because the focus ring was loose, so I

bought it, $25.00, and took off the rubber lens hood. Found that the trim

ring on the front was barely held on by a thread of glue, gently lifted that

off, and there are the three standard screws, all loose, that secure the focus

ring.

Great now how do I find the right place for infinity-focus and snug this down?

Does anyone know the proceedure for this, what's the secret?

How does a repair shop do it?

Thanks! Great forum here,

I owned the SL35M back in '79, and I can tell you it took suberb shots, I used it almost daily, for the highschool yearbook, and it was very dependable. The really wonderful thing about it was the viewfinder- a beautifully made diagonal split prism surrounded by a coarse-ground collar- which all becomes invisable at perfect focus-- It remains the best focus screen I've ever used.

The only thing people didnt like was it's large size and wieght- but I noticed it helped me hold it steady. Lens was the Rollei Planar 1.8/50mm HFT, which was very sharp.

Don't believe the rumours about this camera- it took wonderful pictures. I would put it up for auction and let people who know, like me, bid for it.

:)