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Zeiss Montierung I

Started by Frank Ziegenhein, February 12, 2019, 10:11:59 pm

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Frank Ziegenhein

Hello
I haf an old German equatorial mount for telescopes. It's a "Montierung I" from Carl-Zeiss-Jena. This mount hase an unusual long barre (455mm) for the counterwight. Other mounts of this type, that I have seen, all have shorter barre (170mm).

Niall McLaren

Interesting - how old do you reckon it is Frank?
"A little bit of something beats a whole lot of nothing." - Little Richard

Frank Ziegenhein

hello niall
I am still researching. The mount was offered for the first time in 1949 with the scope "Schulfernrohr 63/840". It was probably built until 1959. Probably my mount is for a Cassegrain 150/2250.

Niall McLaren

Nice - I have a couple of Telementors but every time I get one out it clouds over... ::)
"A little bit of something beats a whole lot of nothing." - Little Richard

Frank Ziegenhein

The special character of the mount is the long rod for the counter weights. When the weights are located at the outer position the system is not very stiff. It moves a bit which is uncommon for a zeiss construction which are usually very well made.

Niall McLaren

Maybe there's a little wear or distortion  Frank - the counterweight at full displacement puts maximum stress on the mechanism.

Like you, I find Zeiss telescope mounts to be well made - any deflection with a telescope at high power really rattles my chain as the viewed object jumps in and out of view. ;)
"A little bit of something beats a whole lot of nothing." - Little Richard

Frank Ziegenhein

I think, there ist no wear. Only the rod bends slightly. The axles run in solid sliding bearings. (Sorry, I do not speak English well, I hope I do not make too many mistakes  :'()

Niall McLaren

I do not speak English well, I hope I do not make too many mistakes

Kein Frank - alles ist gut! ;)

If there's still a little play and everything is fine, it must be down to tolerances. In Britain we talk of a Friday job - best to avoid a car made on a Friday... ;D
"A little bit of something beats a whole lot of nothing." - Little Richard