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  1. Re: Wish I had researched a bit on the Wista 45D

    I'm pretty sure you can replace the back. Finding one that is cheaper than a very used Wista 45 is another thing. Maybe ask Kumar here on the forum. I understood he isn't as active in selling anymore...
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    Re: mounting gelatine filters between glass

    They use an internal numbering (unless that is the Agfa numbering) but can provide according to Agfa or Kodak numbering. Or to specification. Also neutral density (including center filters for...
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    Re: mounting gelatine filters between glass

    Drew, I bought a set of Lee "polyester technical filter" (R, G, B) 100x100 and that was 36 euro/piece. The gelatine filters are made by a german company that casts their own sheets and they quoted 26...
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    Re: mounting gelatine filters between glass

    Those polyester cost more than new gelatine!
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    Re: mounting gelatine filters between glass

    The filters I'm looking at (and will try) are newly made gelatine filters. The green is out of stock and will take some time for new to be made.

    Can someone point me to measurements/articles that...
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    Re: mounting gelatine filters between glass

    Well, I do have some old slide MF glass around, they are sending me a sample of the gelatine filters. So I guess that ordering some canada balsem and reading that nasa article a few times is in...
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    Re: mounting gelatine filters between glass

    Replacing them by resin had been my first idea. That's why I ended up with the Lee polyester ones, but those are thin sheets. Not the solid thick ones I had expected. I haven't been able to find any...
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    Re: mounting gelatine filters between glass

    Problem is that this is for a tricolor camera, they don't go before the lens, they are mounted just before the film holders. There is no way to mount the gel. I'd have to make holders that are about...
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    Re: mounting gelatine filters between glass

    Interesting article. Looks a bit terrifying to be honest.

    I hope you mean that glass is 0.063" ;) It could work, there is some margin for slightly thicker filter assemblies. Maybe I should visit a...
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    mounting gelatine filters between glass

    I need new filters for my tricolor cameras. I have now found a place that can sell me the right gelatine filters. Only problem is that they cannot mount them between glass. I took apart one of the...
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    Re: Help with Super Topcor 5,6/120?

    Almost deleted it thinking it couldn't be that. Happy to help.
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    Re: Help with Super Topcor 5,6/120?

    Probably a very stupid question, but you do have the shutter cocked?
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    Re: Help with Super Topcor 5,6/120?

    Sorry, that is my mistake. Not a native english speaker.
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    Re: Help with Super Topcor 5,6/120?

    I'm not following.

    Apart from the flash socket being on the lens board and wired to the shutter, this is a normal rear element-shutter-front element construction. So if you removed the rear...
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    Re: Liquid pump for possible DIY processor

    I have my doubts about how fast it can fill a development tank. I find it can deliver max 50ml/minute. So unless you can lift your film out of the tank until it is full this doesn't look good because...
  16. Re: Disastrous Consequences (solved: fog with Intrepid lensboard)

    As someone who has designed and have produced both pcb's and metal parts as a commercial process I have done similar homework repeatedly.

    I won't comment on wood as yes, that might be troublesome....
  17. Re: Disastrous Consequences (solved: fog with Intrepid lensboard)

    With waterjet cutting available very easy and low cost I see no advantage in using FR4. In fact unclad FR4 might be even more expensive than plain alu as it is a less standard product than copper...
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    Re: Radioactive Lens Treatment

    Might give my 50 takumar some light then, it begins to get a slight tea color.
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    Re: Carl Zeiss Jena Tessar 150mm f4.5

    Zeiss was originally a single factory in Jena but after WWII split into 2: "Zeiss Oberkochen" in the West and "Zeiss Jena" in the East. Then there was a fight over the use of the name "Zeiss". And...
  20. Re: Rethreading screws (the search for replacement screws)

    Well Tony, after that you need to be honest and say that Drew is absolutely correct! And don't get me started on BA threads:
  21. Re: Southern California incinerator source for black-and-white negatives?

    I do not understand that destructive urge. While it may seem like failures now, it might be the only memories of something that persist through time. If we would only have "artistic valuable" photos,...
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    Re: Fujinion W f5.6 210mm fuzzy at wide open

    A missing shim would be my guess.
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    how to cut film in the dark?

    So I ordered the wrong size of film. Stupid, I know. But now I have that camera that I want to try and only film that is larger then what I need. I need 6.5x9 cm (but ordered 3.25x4.25 inch). I don't...
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    Re: Ilex n4 ACME shutter problem

    Thanks Kumar! Went to my workshop and made a screwdriver to fit between the shutter and front so I could loosen the screws holding the bellow.
    ...
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    Re: Ilex n4 ACME shutter problem

    An angled one wouldn't help, the distance is too large. But the "low profile" screwdrivers on your link could help to get the bellows loose at the front and let me in that way. Thanks for that link,...
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    Re: Ilex n4 ACME shutter problem

    As there seems to be no other option I went in from behind by opening another cover plate of the body. Now I can see the screw but there is no way to get at it in a straight line.
    ...
  27. Re: tools to remove anatomical grip on Technika V

    Go to a car shop and buy a set of spark plug feeler gauges (*). Cut to size and fit in a vise grip. Or be fancy and make a handle for it.

    (*) a set of separate blades for each size, not those...
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    Re: Ilex n4 ACME shutter problem

    Update time.

    1: I cannot remove the lens element at the back so that might not be a good idea.
    2,3: difficult but see further

    I wanted to make some photos as Jason suggested. So I got better...
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    Re: Ilex n4 ACME shutter problem

    Ok, I tried but no movement in it. Any ideas how to get it moving? I don't really fancy getting penetrating oil on the thread. Or worse getting the torch out to heat it up.
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    Ilex n4 ACME shutter problem

    I have this tricolor camera with an Dogmar 8.25" in an Ilex n4 ACME shutter that needs some care. The first problem is that I cannot get it off the camera... I do not see a way to get access to the...
  31. Re: How To Properly Determine Infinity For a Lens?

    Well, normally you measure from the film plane. 35mm SLR's (digital and film) all (AFAIK) have a mark on their body indicating the film plane. Looks like a sort of plimsoll mark on top of the body.
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    Re: 3D Printing a lens bard adapter?

    Having used 3D printing, stereolithography etc since 1998 or something around that time I have my doubts for it in this use. Yes, it seems easy but it isn't. If you can make a .stl file, you can make...
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    Re: Teach me about Lens Design

    Easiest way is to fly-cut in a mill. Setting up a thin board like that in a lathe isn't that easy. Certainly as it isn't circular.
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    Re: Leaf Shutter High Speed

    Let's keep it to mechanical leaf shutters. Otherwise we could wander to Faraday/Kerr cell shutters and other fancy stuff like that. Or Eg&G Microflashes.
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    Re: Leaf Shutter High Speed

    Ok, so about 0.0001s between samples and your shutter time should be 0.0025s or 25 samples. Now if you take that the slopes are about symmetrical around the 100 level (50% level) then for "total...
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    Re: Leaf Shutter High Speed

    I find this an interesting curve. It is indeed more what you would expect. Could you please give the horizontal axis and what setting the shutter was set at?
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    Re: Leaf Shutter High Speed

    I wonder what the result would be if you compare a normal Compur with an electronically controlled one like in a Fuji GX680 or Bronica.
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    Re: Teach me about Lens Design

    Alan Greene describes 2- lenses to make yourself in his book "primitive photography". They are based on old designs. Might be a starting point. They don't have a shutter, can't recall if they have...
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    Re: Justify the acquiring of a new Linhof Technika?

    Again I find that few have real experience of quality and engineering of Linhof. I agree that mine is based only on the 220 and a single problematic shutter. Compared to all the other stuff I have...
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    Re: Justify the acquiring of a new Linhof Technika?

    Edsels might be beautiful but I would never call them quality or well engineered. Not even owners would call them that.
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