Dallmeyer No.5 WA Landscape 15" Flange Mount Size?

[Journeyman28762]

I'm awaiting on the arrival of a 1873 JH DALLMEYER NO. 5 WA LANDSCAPE 15" BRASS LENS W APERTURE ASSY that is missing the flange mount.

Does anyone know the size of this mount?

Thanks in advance...

 

[Ron (Netherlands)]

it might help if you measure the diameter of the (threaded) mount, and - with help of a thread gauge - measure the thread pitch (I've answered this on your same question in LF forum)

 

[Journeyman28762]

it might help if you measure the diameter of the (threaded) mount, and - with help of a thread gauge - measure the thread pitch (I've answered this on your same question in LF forum)

Thanks, Ron. I'm still waiting for the lens to arrive, but have ordered a thread gauge in the meantime. Just hoping someone here might also have that lens or know the dimensions.

 

[Rod Klukas]

Ask SK Grimes. They may know the size already and they make new flanges.

Rod

 

[Journeyman28762]

Thank you, Rod. I inquired and they didn't know, but can make one for me if I send the lens to them. I'm checking now on a more local option, but will keep SK Grimes in mind if that falls through. Many thanks..

 

[Ian Grant]

Can you measure the diameter, I think it's the lens in the bottom left list.

Somewhere I have a catalogue (PDF) that includes Dallmeyer flanges. I think that lens diameter is 2 5/8" so it's probably a 3" flange around 24 TPI. I just checked my Dallmeyer 2B which is 2¾" diameter, but it's in a rack & pinion focus tube and a 3¼" flange.

3" 24TPI flanges were quite common I have a 17,5" TTH RR, and a 20" RR both 1890s and a mid 1950s 12" Wray Lustrar all fit the same flanges.
Have you looked to see if you can find your lens in the Dallmeyer Archive. I found two of mine and photos of Alec Strachan who assembled my Stigmatic.

Ian