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  1. Re: Rodenstock lens set. Any information about this one?

    Yes, and I think this one being offered over here has only 6 out of the 7 cells. I will check it out and probably let it go.
  2. Re: Rodenstock lens set. Any information about this one?

    More info:

    207919
  3. Re: Rodenstock lens set. Any information about this one?

    Thank you Ron, with the key word you gave me "Bistigmat", I was able to find a lot more information on the web and also in other threads over here in LFPF.
  4. Re: Rodenstock lens set. Any information about this one?

    The lens displacement when the lever is actuated is so long that it makes me think it could be in a camera without bellows. It is a small lens, all the way forward it will probably focus a short...
  5. Re: Rodenstock lens set. Any information about this one?

    It is Rodenstock, I picked this picture because it gives a reference of size. But there are others with engravings.
    You are right about the helical. Only now I paid attention to the video. Auction...
  6. Rodenstock lens set. Any information about this one?

    This Rodenstock lens set is being offered over here in Brazil at ~200 euros price. Glass is nice but there is one broken iris blade inside. I don't know anything about it and searched for Rodenstock...
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    Re: Hermagis image size

    I made some pics with it. Here is dry plate portrait 18x24 cm. Contact printed on Fomatone MG Classic. I trained negative retouching with this one. Didn't want over do it and maybe end up leaving a...
  8. Solar UV exposure meter - for printing processes

    Hello, I would like to share with you a project that may be interesting for those doing printing processes using UV light. The idea is a device that allows you to print using sunlight and get...
  9. Re: Were Verito 18” lenses made in different barrel lengths?

    If that helps: I have a Verito 18" f/4,5 #15204 with iris and without any shutter. Total length is 7 1/4" (184 mm). The flange is positioned at the rear of the lens.
  10. Re: Online Reference for overview of Darlot Lenses?

    I like the idea of removing the old varnish and applying a new one when the barrel becomes plenty of flaws and stains. But I see and almost understand that some people consider that a sort of...
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    Re: Help to identify a Steinheil lens

    I am wondering whether it is a regular Aplanat with two pairs of flint or a variation made by Steinheil, from 1874 to 1881, combining F+C - C+F. These are told to be brighter (Agostini) and having a...
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    Re: Help to identify a Steinheil lens

    Yes, it is 9780.
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    Re: Help to identify a Steinheil lens

    Yes, thanks Ron, they are similar in proportions of their different elements. Corrado Agostini (only now I realised that I wrote "Corradini", in my post, sorry by that, it is now correct) mentions a...
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    Re: Using 3D print for Waterhouse stops

    Drew, brass is not suitable for laser cut and I don't know what kind of machine and file is used to cut it to a certain shape. I sent already Waterhouse stops files to laser cut, the material was...
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    Using 3D print for Waterhouse stops

    204576

    It was always a problem for me to produce Waterhouse stops when they are missing in a vintage lens. Recently I tested with 3D printing and it worked so well that I am sharing the idea here...
  16. Re: HERMAGIS 440mm Aplanat No.4 Series II - and iris as f numbers - little help

    It is not that difficult to measure them: https://apenasimagens.com/en/measuring-lens-aperture/
  17. Replies
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    Help to identify a Steinheil lens

    Any clue about which lens is this amongst the Steinheil's different designs and uses? It seems to be symmetric. Barrel diameter is 70 mm. Height is 150 mm. Serial number, according to Agostini,...
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    Re: Black paint around the edges of lens

    I use shellac, very diluted in alcohol, with black dry pigment. It works very well.
  19. Enlarger head using RGB LED 3W - complete project

    201957

    Two years ago I published an adaptation of a Durst Laborator 1000 replacing condensers by a LED box. The project used an old TV remote control and had some points to be improved so I did...
  20. Re: Focusing range of Goerz Dagor 305mm 6.8 for portraits?

    I was tired of doing always the same calculation whenever I was asking myself "what can I do with this lens in this camera", so I made an online simulator that I can check in my mobile phone. One has...
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    Re: Weird Heliar 42 cm

    189972189971189973189974

    Doing a quick & dirty test: when lens hood is facing the scene, image is OK, but in fact iris is not in the right place for a Heliar, it is close to the front element. But...
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    Re: Weird Heliar 42 cm

    Thanks everybody for the useful information. And yes, the ,5 is almost gone but it is there. It is a f/4,5. The serial number is 108353, not so sure about the 8 as it is almost gone too. Maybe it was...
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    Weird Heliar 42 cm

    189882

    Hello, a friend of mine gave me this Heliar 42cm. The barrel is un lousy condition but iris and glass are quite OK so I would like to put it back to work. I found strange that the way the...
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    Re: Which Canada balsam to restore a Verito 18"?

    Thank you all for the recommendations and considerations. I ordered already a Synthetic Balsam and expect to post here a beautiful restored Verito 18" and a couple of days. Regarding solvent for UV...
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    Re: Which Canada balsam to restore a Verito 18"?

    Nodda, thanks for your recommendation. I saw my friend cementing doublets of his production and he does it the way you described. But he said that the solvent is so poisonous that in case of problems...
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    Which Canada balsam to restore a Verito 18"?

    Hello,

    I bought a Wollensak Verito 18". Glass is in mint condition except for an almost 1/2 inch thick ring of balsam oxidation. I have a friend with a small optics workshop (he produces prisms,...
  27. Any guidance on substituting 85% TEA solution for pure TEA in pyro formula?

    Hello, I've been using 510 Pyro for quite a long time. Specially with HP5 20 min 20ºC stand development, it has given excellent results. But for some time now, in Brazil, where I live, it is...
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    Re: Age of Wray Lens?

    I also have a Wray, serial number is 490. It seems to be a RR. I found some entries about Wray in the British Journal of Photography, for instance, in April 14th, 1893, there is a nice report about a...
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    4x5" or 9x12cm Camera Back - DIY

    I always believed that this would be a high precision work. Impossible to be done at home, with manual tools. But I tried and it worked very well. I am still surprised how easy it was. So I am...
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    Help with Bausch Lomb old shutter

    I recently acquired an old Planar mounted in a Bausch Lomb shutter and I was not able to figure out how it works. I understood where and how speeds and apertures are set but not quite about how to...
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    Re: Paper on the History of Petzval's Lens Design

    Thanks for sharing!!
  32. Re: How does one determine how close a given lens can focus given a given bellows dra

    Paul, I think that this may be a useful simulator for you: https://apenasimagens.com/en/focal-length-distances-and-framing/
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    Re: Help with Hermagis Petzval lens info

    Rudi, good point. I will check it out and let you know. I am still working on a camera to fit this lens. Cheers
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    Re: Help with Hermagis Petzval lens info

    No, I took for granted what is written on that catalogue (posted above) mentioning that the portrait Nº 5 should be 310 mm. Do you think it could be otherwise?
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    Re: Using a Petzval portrait lens

    I tested it. The attached images show a portrait made with a Derogy Rapide nº4, Petzval type, 223 mm focal length, fully opened, serial number 40022. I used FP4 9x12 cm. First of them I just kept the...
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    Re: Using a Petzval portrait lens

    Pere Casals, beautiful picture!!! It is intriguing how come that the lens could focus on the girl and also on the bushes that seem to be half the distance. Otherwise it illustrates the rule of 1/3 of...
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    Re: Using a Petzval portrait lens

    Scott, that is what I want, thanks for sharing. What I still don't know is whether with the lens fully open, f/3.7, aiming the lens axis to where one wants sharpness, would provide a significant...
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    Re: Using a Petzval portrait lens

    My problem is that I am using a Linhof Tecknika 13 x 18 cm with 4x5" back. This camera has so little lens fall (for faces on the upper part of the frame) that I will have to use angles: tilting the...
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    Using a Petzval portrait lens

    Let us say that you have a half body portrait to make and you want to use a Petzval lens. According to your composition the sitter’s face is not at the center of your frame (where you get Petzval’s...
  40. Re: Hermagis Serial numbers Need your help with a database

    I have a 46559, Petzval Portrait type, with year of production written on front lens border as 09. I was told that this is 1909. Pictures in this thread:...
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