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JP-Astro

Solid visual setup for years to come: SC 8" +...

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Posted (edited)

Hello,

I just joined this forum and I have a few questions. I'm located in the Noth of Europe and just starting out in visual Astronomy. I'm not planning any imaging in the near futurte if at all.

I got myself a Celestron 8" SCT as a multy-purpose 'do it all' basic telescope and I'd like to pair it with something else for the years to come. Please advise me a second device to complement my SC but please bear in mind that I'm not interested in a Newtonian reflector at all for the portability reasons. I suspect this only leaves me with an option of getting a refractor but since I'm on a tight budget I don't know what type of a reasonably priced refractor (below $1200) would be a good budget complement to my current SC 8" tube.

Please give me some options and explain why they would be a good complement to the SC. What am I limited in with the SC and what those refractor options would give me as a complement?

As far as I understnad for visual observations I need something with a good aperture not below 105 or maybe even 120 but anyway please state clearly what in your opinion would be my benefit from getting a refractor as a complement to my SC. If I'm not gaining anything please don't hezitate to set me straight.

Edited by JP-Astro

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If I was buying complementary scope I would get a fast refractor for low power wide field views. I think even achromat would do, since it is mostly higher powers where CA becomes a problem. Probably something around 100mm f/6 with 2" focuser.

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I basically agree with @pregulla. The C8 gives you a higher power, narrower field of view, so a nice widefield refractor will complement it very well giving you the best of both worlds.

Personally I would go for a 4" apo doublet of some sort, possibly something from TS would work well such as this one.

https://www.teleskop-express.de/shop/product_info.php/info/p9868_TS-Optics-PhotoLine-102mm-f-7-FPL-53-Doublet-Apo-with-2-5--Focuser.html

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Posted (edited)

Thank you for your suggestions. I was very close to your idea im my contemplations. That's probably what I need indeed: a short wide field achromat!

On the one hand it's compact and on the other hand it's quite the opposite of my SC 8".

Edited by JP-Astro

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By the way when comparing 2 devices like SCT and Maks and looking at SC 8" and a very popular Mak 5" - is there anything that would interest an SC 8" owner in its smaller slightly different Mak 5" brother except for a more compact size?

In other words, if one owns the SC 8" I suspect there is absolutely no reason to look at a smaller device of a similar type like the 5" Mak. True?

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The 5” Mak is a good companion to the C8. Small and portable and can be fitted to a light weight tripod for a really portable setup. 

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A 4" ED refractor will be far more versatile than a 5" Mak, as it will give you the wide field views a SCT or Mak Cass can't. A 4" ED like Stu suggested above would be a perfect complement to your 8" SCT. Another option may be a second hand SW 120ED, yet it is still easily transportable and doesn't need a heavy mount. The ED refractor will also have the added advantage of being truly sharp with great definition and very high contrast.

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