Which one is the finderscope?

Discuss your refractor type scopes here.
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deci.bel Canada
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Which one is the finderscope?

#1

Post by deci.bel »


I hope everyone can view the observatory telescope linked below. It's a very old refractor, probably with specs similar to a 7" Mak. But it also looks like it has more than one finderscope. Are there more than one finderscope, or what are all the tubes attached to the main OTA?

http://digital.scaa.sk.ca/gallery/uofs_ ... tory_2.htm
Dan
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Re: Which one is the finderscope?

#2

Post by SkyHiker »


It looks like the Telrad is the first finder. The small tube to the right could be the next viewfinder. The second largest tube could be next but more likely it is an additional telescope. Maybe it is more practical, or better depending on the circumstances?

My astronomy club manages an observatory with a 20" RC but most people look through the two attached refractors because to look through the eyepiece of the RC you have to get down on your knees. The mount is so big that you can easily add two more scopes.
... Henk. :D Telescopes: GSO 12" Astrograph, "Comet Hunter" MN152, ES ED127CF, ES ED80, WO Redcat51, Z12, AT6RC, Celestron Skymaster 20x80, Mounts and tripod: Losmandy G11S with OnStep, AVX, Tiltall, Cameras: ASI2600MC, ASI2600MM, ASI120 mini, Fuji X-a1, Canon XSi, T6, ELPH 100HS, DIY: OnStep controller, Pi4b/power rig, Afocal adapter, Foldable Dob base, Az/Alt Dob setting circles, Accessories: ZWO 36 mm filter wheel, TV Paracorr 2, Baader MPCC Mk III, ES FF, SSAG, QHY OAG-M, EAF electronic focuser, Plossls, Barlows, Telrad, Laser collimators (Seben LK1, Z12, Howie Glatter), Cheshire, 2 Orion RACIs 8x50, Software: KStars-Ekos, DSS, PHD2, Nebulosity, Photo Gallery, Gimp, CHDK, Computers:Pi4b, 2x running KStars/Ekos, Toshiba Satellite 17", Website:Henk's astro images
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deci.bel Canada
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Re: Which one is the finderscope?

#3

Post by deci.bel »


SkyHiker wrote: Mon May 22, 2023 12:45 am It looks like the Telrad is the first finder. The small tube to the right could be the next viewfinder. The second largest tube could be next but more likely it is an additional telescope. Maybe it is more practical, or better depending on the circumstances?

My astronomy club manages an observatory with a 20" RC but most people look through the two attached refractors because to look through the eyepiece of the RC you have to get down on your knees. The mount is so big that you can easily add two more scopes.
I didn't even notice the Telrad until you mentioned it! Okay, so there's a bar underneath the second largest tube, the one you said might be a secondary scope. What do you think the bar is for? It looks pretty thick.

EDIT : I'm referring to the white bar, but there's also a brass bar underneath that. : EDIT

And then there's what looks like a weight on the top. The counterweights are facing directly away from the camera, so can't be seen.
Dan
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Richard South Africa
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Re: Which one is the finderscope?

#4

Post by Richard »


Yes their is a optical finder and then they added the Telrad , the other is a balancing weight
Reflectors GSO 200 Dobs
Refractors None
SCT C5 on a SLT mount
Mak 150 Bosma on a EQ5
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helicon United States of America
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Re: Which one is the finderscope?

#5

Post by helicon »


I would bet they use the Telrad for getting their bearings, then observing with the finder.
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
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