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Thread: C11 on cem60

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    Default C11 on cem60



    Hi,

    I am thinking of upgrading my C8 to C11. I would like to hear your experiences with a heavy telescope such as C11, Meade 10"/12" or 10"/12" RC. Can cem60 handle the weight? The main use is in astrophoto. I have been very pleased with imaging using 10-20min subs.

    br,
    anttij

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    Default Re: C11 on cem60

    I have used a C-11 on a CEM60 with no problem. Guiding it will be a challenge because of the long focal length, but I have done it with okay results.
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    Default Re: C11 on cem60

    There are many examples of the CEM60 with C-11 on Astrobin. As Kathy said it takes good guiding. Using the reducer will help reduce the guiding requirements, as well as picking the right pixel sized camera to limit the image scale you are getting.

    Maybe this question also merits a question in return. What is your experience level with astro imaging? It is often said (although I personally don't believe in fully) not to start with too big a scope. So take care when considering the C11. Also, for imaging you don't always need the largest aperture but rather sometimes longer time on target results in better output with a smaller scope.

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    Default Re: C11 on cem60

    Thanks for your replies. I have used my C8 with ATIK460 for five years now with different setups (f6.3/Hyperstar) and I have been very pleased with CEM60 as my guiding RMS is usually 0.6-0.9" during 30mins, which is great. I am thinking of upgrading to c11 for the aperture as I enjoy imaging galaxies. ATIK460 will be very good with c11 (binx2). I did try to find images in Astrobin with c11 and cem60 but I got mainly planetary pictures and therefore I started to think if c11 is not that often used with cem60 due to weight. Total weight of the setup will be about half of the max payload. What do you both think, will the weight cause the guiding be worse than >1"? (difficult question I know...)

    br,
    anttij

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    Default Re: C11 on cem60

    If you buy a AO unit (starlight xpress) you will certainly be able to guide at long focal lengths. Basically the AO unit makes the guiding corrections by moving its internal lens instead of the mount, a small lens moves much quicker and easier than a heavy mount. Drawback? unless you have a OSC the AO uses up a lot of backspacing so you can't use reducers with them.
    12" lx600 ota, Cem120, STT8300M FW8G AO-8t, meade LPI-G mono, STL-11000m MOAG, AO-l, Bob's knobs coll , williams 2" dielectric diagonal, kendrick dew controller, astrozap heated dew shield, Bresser 70 eyepieces, HD60, meade stella,optec leptus .62, astrodon 36mm lrgb oiii sii ha 3nm, meade 6" SN, meade 70mm astrograph, Meade 130mm apo, asi1385c, theskyx pro

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    Default Re: C11 on cem60

    Thanks mbenjamin for your comment. I have also considered AO to be a very interesting choice and I seriously have to go thru the specs so that I won't run into trouble with backspacing. Let's see if I end up buying the c11 and with it, AO will definitely be my next move...
    aj

 

 

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