Page 2 of 2 FirstFirst 12
Results 11 to 18 of 18

Thread: Help with Hermagis Petzval lens info

  1. #11

    Join Date
    Jul 2012
    Location
    Stockton, California
    Posts
    882

    Re: Help with Hermagis Petzval lens info

    1909 seems about right in light of the serial number

    The number preceding the 09 are most likely the focal length numbers for the individual elements, easy to verify.

    Cheers,

    Rudi A.

  2. #12

    Join Date
    Jan 2009
    Location
    Denmark
    Posts
    5,639

    Re: Help with Hermagis Petzval lens info

    Yes! Hermagis used the last two digits - both in the 19th and 20th centuries.

    It matches well with the known matches of serial numbers and dates of production.

    http://www.largeformatphotography.in...ermagis+serial

  3. #13

    Join Date
    Jun 2006
    Location
    Brazil
    Posts
    153

    Re: Help with Hermagis Petzval lens info

    Looking to Jaytral's chart I was wondering what the size "carte-album" would be. After more than one hour on books I have in paper or digital and on the web I found in Fabre T3 that carte-album is 10 x 14 cm. Meanwhile I found also that the carte-boudoir is 6.5 x 8.5" and cabinet means 5x8" (those I found in an advertising in Philadelphia Photographer 1884). Carte-de-Visite is an easy one: 54x89 mm, found on Wikipedia. Does anybody know a good summary/history of those formats? It would be nice to have it condensed somewhere.

  4. #14

    Join Date
    Jun 2006
    Location
    Brazil
    Posts
    153

    Re: Help with Hermagis Petzval lens info

    More about the carte-album format: I found an interesting book with good descriptions of the most important photographic studios in Europe (from 1882).
    It says that the "cabinet" format was introduced in London and became later the "carte-album" in other countries:
    "But the Window and Grove establishment has other claims upon history. The cabinet portrait was born here. Mr. Window was the first to suggest and press upon the attention of the public this familiar style, which has not only become popular in this country, but as the "carte album" is in favour throughout the Continent and in America".

    But 10x14 cm (Fabre) does not match 5x8" (in Philadelphia Photographer ad - 1884) that would be 12.7 x 20.32 cm (?) I think Fabre wouldn't be wrong about carte-album. I need to confirm the cabinet format somewhere else. Wikipedia says cabinet card is: 108 by 165 mm ( 4 1⁄4 by  6 1⁄2 inches). Any other clue?

    This is a link to download it: https://archive.org/details/studiosofeurope00prit

  5. #15

    Join Date
    Jul 2012
    Location
    Stockton, California
    Posts
    882

    Re: Help with Hermagis Petzval lens info

    Quote Originally Posted by lungovw View Post
    Besides Hermagis Opticien à Paris I have the following figures:

    Attachment 172015
    Attachment 172016

    Those are in the doublet and rear meniscus. The biconvex has such a thin border that nothing is written on it.
    None is a clear "year". Should I take the 09 as 1909?

    Have you measured the focal length of this lens ?

    Cheers,

  6. #16

    Join Date
    Jun 2006
    Location
    Brazil
    Posts
    153

    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?

  7. #17

    Join Date
    Jul 2012
    Location
    Stockton, California
    Posts
    882

    Re: Help with Hermagis Petzval lens info

    Quote Originally Posted by lungovw View Post
    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?
    I have quite a few lenses that do not follow catalog. There were often "specials" ... some are clearly labeled like a #5 and a 5A or even 5B but some are not labeled at all. That's why I always measure.

    Reason in particular to ask for your lens is that you have in total 4 numbers on your lenses. If I feed those into my calculator assuming that these relate to the focal length of the individual lens elements, then I arrive at a shorter focal length and a lower f # of course.

    Just double checking. Either my assumption is right or it's wrong and then the 4 numbers are unrelated to focal length.

    Thanks for the support.

    Cheers,

  8. #18

    Join Date
    Jun 2006
    Location
    Brazil
    Posts
    153

    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

Similar Threads

  1. Hermagis Lens Info ?
    By Retro-Vintage in forum Lenses & Lens Accessories
    Replies: 9
    Last Post: 7-Mar-2011, 02:04
  2. Looking for info on petzval lens
    By Jim Cole in forum Lenses & Lens Accessories
    Replies: 19
    Last Post: 7-Apr-2009, 15:28

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •