Results 1 to 7 of 7

Thread: Help with more info about an old lens

  1. #1

    Join Date
    Sep 2013
    Location
    Croatia
    Posts
    5

    Help with more info about an old lens

    Hello to all,

    I am new here and I would like your help - recently I bought two old lenses and I found lots of information about one but not about other - i found some general info but not fot this exact lens - "Monar" F: 3,5 / G.Rodenstock Munchen - it is about 5 inches long (12,5 cm) and filter size is about 3 inch (7,5cm) - pictures attached - I found some similar lenses but not this exact one so if you have more info about model, year...etc. I would be grateful.

    Click image for larger version. 

Name:	IMG_7061a.jpg 
Views:	37 
Size:	35.6 KB 
ID:	102313Click image for larger version. 

Name:	IMG_7067a.jpg 
Views:	47 
Size:	32.7 KB 
ID:	102314

    Also other one is Dallmeyer 3B - found lots of info about it but I was going trough this forum and saw sometimes there are fakes - what is best way to check is it a real thing?

    Click image for larger version. 

Name:	IMG_7069a.jpg 
Views:	44 
Size:	38.3 KB 
ID:	102315Click image for larger version. 

Name:	IMG_7070a.jpg 
Views:	50 
Size:	34.5 KB 
ID:	102316

    P.S. - when I bought them they were dusty and dirty so I cleaned them with water, baking soda and lemon juice mix and oil them lighly with olive oil (found on net that is good for cleaning brass) - was that ok to do? - took me 2 days of rubbing with cloth but now they look much much better

    Thank you!

  2. #2

    Join Date
    Sep 2007
    Location
    AZ
    Posts
    4,384

    Re: Help with more info about a lenses

    The Dallmeyer is real, it's not fake. The engraving all looks fine, and no one really faked them that often. However, it looks like you scratched the brass quite a bit polishing it. With a high quality, desirable lens, in most cases, it's best not to try to polish them, just leave them as is. But sometimes they are very rough, with partial varnish, partial verdigris, and they do look pretty bad that way. In those rare cases, you need to polish a lot less aggressively, using something like silver polish.

  3. #3

    Join Date
    Sep 2013
    Location
    Croatia
    Posts
    5

    Re: Help with more info about a lenses

    Thanks Garret, that is good news I tried to be as gentle as I can, that is why I used cloth and rubbing by hand - didn't want to use polishing paste or similar I just wanted to remove dirt and there was some scratches and small dents on them already...

  4. #4

    Join Date
    Jan 2009
    Location
    Denmark
    Posts
    5,994

    Re: Help with more info about a lenses

    If you have to clean (a second attempt, perhaps?) ALWAYS keep the cloth in one place and rotate the barrel! Sractches that are parallel with the ends of the barrel are almost invisible. Random movements create the appearance you have now.
    As far as I remember, the Monar is a very rare soft lens from München which never achieved great sales. You (we) might find out by using the search function here.

  5. #5

    Re: Help with more info about a lenses

    The very best and quickest polish for tarnished Brass is readily available in your kitchen or grocery store, BEFORE using it on anything Camera oriented clean that old brass hose nozzle. it is, Worcestershire sauce. Put it on a cloth spread it around, wait a little, wipe and rinse rub it to the degree of polish you want. if it works to well thin it with water, to what ever degree that suits you. ART?

  6. #6

    Join Date
    Sep 2007
    Location
    AZ
    Posts
    4,384

    Re: Help with more info about a lenses

    It's the vinegar, acetic acid. Citric acid works too. So anything made with those, including catsup, will take away tarnish. The problem with brass is, it will also leach out the copper onto the top surface, if left long enough, making your brass lens look an unoriginal copper. I don't recommend any acid, or even polishing any but the most crusty lenses. If the lens is rare or desirable, or has 50% of the original varnish or more, leave them alone.

  7. #7

    Join Date
    Sep 2013
    Location
    Croatia
    Posts
    5

    Re: Help with more info about a lenses

    Thanks for advices, well original varnish was gone and it was almost black with some parts that looked like pine resin smudges - sticky dust and dirt... inside and glass were dusty but ok, but outside brass looked horrible and sticky (and it didn't move) so probably I rubbed harder than I should sometimes... I am thinking of another go as Steven wrote with rotating barrel so if I get lines they will be parallel with ends.

Similar Threads

  1. Info please on Scientific Lens Co Portrait lens
    By lenser in forum Lenses & Lens Accessories
    Replies: 13
    Last Post: 20-Jul-2019, 01:39
  2. wollensak lens info
    By anthony marsh in forum Lenses & Lens Accessories
    Replies: 9
    Last Post: 29-Mar-2010, 14:30
  3. Looking for info on petzval lens
    By Jim Cole in forum Lenses & Lens Accessories
    Replies: 19
    Last Post: 7-Apr-2009, 15:28
  4. Info about this lens will be most welcome
    By Gustavo in forum Lenses & Lens Accessories
    Replies: 25
    Last Post: 22-May-2008, 13:23
  5. Process lens info.
    By John Bredin in forum Lenses & Lens Accessories
    Replies: 1
    Last Post: 11-Jun-1999, 20:48

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
  •