Support our Sponsors, they keep FADU free: AG Photographic The Imaging Warehouse Process Supplies RH Designs Second-hand Darkroom Supplies |
> focusing screens |
*** Click here for the FADU 2015/2014 Yearbooks *** |
|
Thread Tools | Search this Thread | Display Modes |
#21
|
|||
|
|||
Quote:
The metal frame is in two pieces -- the main frame which the screen recesses into, and then a thin metal retaining frame held down by little tabs on the main frame. Just bend all the little tabs up, pull out the retaining piece and remove the screens -- nuthin' to it. I recall that this is a two-piece screen (I could be mistaken - it's been a while since I did this), so you may have to use only the fresnel part depending on thickness of the camera's original screen. My Rolleiflex GG screen was about the same thickness as the fresnel alone so I didn't use the other part. To cut to size I used a mitre box and a hack saw. Crude, but it worked. To protect the fresnel especially, as well as the viewing side, I covered it completely with painter's tape, which came off without leaving sticky goo. Take a fine file to clean up the rough edges and you're good to go. Maybe a good idea to wear cotton gloves when handling it to avoid fingerprints and oil in the fresnel grooves. Pro Tip: because you want the new screen to be centered, you probably will need to make 4 cuts (unless you're lucky and one of the dimensions matches the original screen). Cut equal amounts off each side so that the center of the circular fresnel pattern is centered in the camera viewfinder. Easy math to figure out how much to trim, or just lay the old screen centered on top of the taped-up new one and mark with a fine pencil. I think you will like the Mamiya screen. It works brilliantly on my 1950s 3.5C -- nice and bright, and things just snap into focus. Best of luck and let me know how it goes.
__________________
Regards, Svend |
#22
|
|||
|
|||
thanks for the reply Svend ,it wont be any good then i need a one piece ,i will carry on using this one until the right one cheap turns up . ..i only bought the camera because it was going cheap and it is a cracking camera ,its a electronic hasselblad ,with the same make hasselblad lenses i mostly use my 645 autofocus cameras ,so i should not worrie about focusing really .i think i will have to stop buying things and start selling some instead .
|
#23
|
|||
|
|||
Hi Paul,
Not sure why 2-piece would be a problem. The second layer is just a clear sheet with no fresnel. It has no real function I think, except to provide some protection for the delicate fresnel. I just discarded it and kept the fresnel piece. That said, I will check the RZ screen tonight and get back to you to confirm 1-piece or 2.
__________________
Regards, Svend |
#24
|
|||
|
|||
Paul, I just checked and it turns out I had a second RZ screen on hand, unmodified (the seller gave me two I guess). It is indeed a two-piece, with one layer of clear glass with grid lines and the second layer a plastic fresnel screen. I used only the latter piece, cut down, for my 3.5C. I discarded the glass piece. The plastic fresnel is quite thin.
Hope this helps...
__________________
Regards, Svend |
Support our Sponsors, they keep FADU free: AG Photographic The Imaging Warehouse Process Supplies RH Designs Second-hand Darkroom Supplies |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Paterson screens - anyone remember these | Anon01 | Darkroom | 3 | 5th October 2019 02:55 PM |
Mamiya 645 1000s, Sekor C lenses & focusing screens: | AlanJones | Cameras - medium format | 3 | 9th August 2013 10:28 PM |
Projector screens: what are you using? | AlanJones | Equipment miscellaneous | 3 | 28th July 2013 11:41 PM |
updating screens | big paul | Equipment miscellaneous | 1 | 2nd October 2012 04:14 PM |
drying screens | Andy | Darkroom | 4 | 27th January 2010 12:23 PM |