Archenhold 27" Refractor Telescope

[Macavity]

Watched the Jim Al-Khalili program on "Quantum mechanics" (again!) recently.
There are always parts I didn't spot... probably fell asleep during etc. ?

But my Inner Astronomer was fascinated by the Archenhold Telescope (Berlin)! 
A splendidly "Steam-Punk" construction?!? lol. Apparently it has been made to
work again too. D=27";  f=69 ft! Gives a (fixed) magnification of about 200x ?

https://en.wikipedia.org/wiki/Archenhold_Observatory

One of these "interesting" telescope designs that allow the observer to remain
in one position as the telescope moves? Such a thing was/is ever in my dreams! ?

[lenscap]

I wouldn't want to be the person who has to fit a dew shield to it. ?

[lenscap]

3 hours ago, Macavity said:

D=27";  f=69 ft! Gives a (fixed) magnification of about 200x

But why make it so long if they only wanted 200X. Surely about 25 ft  (f11)  would have been plenty.

It is a beast though.

I bet you couldn't drive that with a couple of NEMA17 stepper motors & an Arduino. ?

[F15Rules]

2 hours ago, lenscap said:

I wouldn't want to be the person who has to fit a dew shield to it. ?

You could get a custom made Astrozaaaaaaaaaaaaaaaaasaaap?????

Dave

[RT65CB-SWL]

15 minutes ago, F15Rules said:

You could get a custom made Astrozaaaaaaaaaaaaaaaaasaaap?????

Dave

...either that ...or one large exercise/yoga mat! ?

[kev]

Chrimatic abberation would have meant a long f/l was necessary.   

[Macavity]

I must admit to a certain yearning to look through one of these HUGE scopes.
I got "200x" from a German Astronomer (Tourist) report but it was "closed" for
active viewing on that day / night? I infer the eyepiece was f=100mm, but the
exit pupil still a rather reasonable 3.5mm? I suspect the FoV was rather small. ?

There are quite a lot of old refractors with objective Diameter ~24" but indeed,
most (but not all) tend to be more... f/9 through f/15 rather than an f/35 (69')! ?

 

[DirkSteele]

Next time my wife complains about my 180mm refractor I will show her this. Everything is always about perspective... ?

[saac]

On 11/08/2018 at 15:10, lenscap said:

I bet you couldn't drive that with a couple of NEMA17 stepper motors & an Arduino. ?

Gina , you got any room on your project list?  

Jim 

[Gina]

I don't think so!!!  ?