My complete Dienstglas 6x30

[Nelson Filho]

Yes, it is an excellent introduction to binocular repair and I recommend it. It really helped me get started. However, it is only an introduction and hardly covers everything. I do not recommend trying to disassemble and clean your Dienstglas until you have had a lot of experience on less valuable and easier Porro I binoculars to repair. A good type of binocular to start on would be a circa 1950's - 60's Japanese 7X50 often available at thrift stores, flea markets or eBay for about $20. Read the book; buy an inexpensive Japanese binocular; take it completely apart, clean and reassemble it; then you'll have a good idea of what's involved in servicing binoculars.

Thank you so much for your help!

Best regards,

Nelson

[Stew]

left handed reticles in german dienstglas

hi Wpgbinocular and Nelson Filho, just a couple of points arise:

(i) disassembling a pair of post war 2 Japanese binoculars will certainly provide familiarity with the inners of Porro 1 style binoculars but ....German Dienstglas binoculars have got all sorts of obstacles not to be found in Japanese binoculars .....like hardened sealant and rust...... that may make the disassembly of binoculars problematical . My binocular serviceman allows twice the time to service a pair of Dientsglas 6x30 as a pair of Japanese post war 7x50.

(ii) left sided reticles can be genuinely found in Dienstglas .I have encountered a couple in beh/leitz (double marked)Dienstglas 7x50 in the 477454 range of serial numbers (late war) that have the reticle in the left side. You certainly cannot "inadvertently " swap them from right side to left side because when you screw say the right ocular lens assembly into the left side of the binocular case the alignment mark on the ocular tube will not screw into the case and finish up pointing toward you (6 o'clock )... but the alignment mark could end up at say the 11o'clock position. The left side of the threaded binocular case (or right side) will have a stop on the thread for the ocular lens assembly that is designed to receive the assembly without the reticle. Thus without a fair bit of deliberate machining you cannot get the ocular lens assemblies transposed and still end up with the ocular tube alignment marks where they should be.

[Nelson Filho]

hi Wpgbinocular and Nelson Filho, just a couple of points arise:



(ii) left sided reticles can be genuinely found in Dienstglas .I have encountered a couple in beh/leitz (double marked)Dienstglas 7x50 in the 477454 range of serial numbers (late war) that have the reticle in the left side. You certainly cannot "inadvertently " swap them from right side to left side because when you screw say the right ocular lens assembly into the left side of the binocular case the alignment mark on the ocular tube will not screw into the case and finish up pointing toward you (6 o'clock )... but the alignment mark could end up at say the 11o'clock position. The left side of the threaded binocular case (or right side) will have a stop on the thread for the ocular lens assembly that is designed to receive the assembly without the reticle. Thus without a fair bit of deliberate machining you cannot get the ocular lens assemblies transposed and still end up with the ocular tube alignment marks where they should be.

Hi Stew
I think you are on the right track.. the eyepiece or case are different (screws) but in my binoculars this (graticule) is definitely is in wrong side, the line is on vertical.
When I screw right eyepiece lens assembly on the left side, the line will be horizontal.