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Mount Orion ED80T on Nexstar 8SE OTA?

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9 replies to this topic

#1 Amaranthus

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Posted 14 May 2014 - 11:57 AM

I'm looking at the following setup:

Celestron 8SE OTA
AZ-EQ6 mount
Orion ED80T (piggyback)

I already own the 8SE, and want a dual-purpose imaging/visual setup. This seems like an ideal combination to me, as the total load, including camera/CCD, will be only ~10kg (vs 20kg rating for the AZ-EQ6 mount), and I can use one OTA as a guidescope while I image with the other (depending on whether I want narrow or widefield imaging).

Two questions:
1. Does this type of setup make sense? (apart from to me!)

2. Has anyone tried mounting the ED80T on the C8 OTA? If so, what mounting bracket would I need for my C8?

Thanks for the feedback!

#2 nodalpoint

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Posted 14 May 2014 - 12:52 PM

Make sure your mount can handle all that weight. I'd go with a small 50mm guide scope for the refractor instead of mating the other two together.

#3 Amaranthus

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Posted 14 May 2014 - 12:57 PM

That's another option, yeah. But the total weight would be 5.6 kg (C8 OTA) + 2.5 kg (ED80T OTA) + camera/imager (0.5-2kg), for a total of ~8.5 to 10 kg. The AZ-EQ6 is rated to 20 kg load, so I'm 50% under spec, which seems ideal to me.

#4 Smittty692k4

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Posted 14 May 2014 - 01:43 PM

Seems legit to me... Alot of positive reviews too of people using it in AltAz mode.

#5 Stacy

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Posted 14 May 2014 - 08:23 PM

ADM is the place to get the mounting hardware. Top notch outfit.

#6 hopskipson

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Posted 15 May 2014 - 06:06 AM

One consideration, have you included dew straps, dew shield and mounting hardware into your weight?

#7 Amaranthus

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Posted 15 May 2014 - 11:04 AM

The dewshield for the C8 weighs only a few hundred grams. I don't currently use other dew control, but the dewstraps are light. Remember, I'm planning to underspec the mount by 50%, so there is a lot of margin here, following the 66% rule of thumb.

#8 Smittty692k4

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Posted 15 May 2014 - 11:07 AM

Imaging is usually a 50% rule of thumb if I am not mistaken.

#9 Smittty692k4

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Posted 15 May 2014 - 11:08 AM

Which I think you would still be under.

#10 Amaranthus

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Posted 16 May 2014 - 09:24 AM

I just re-checked the load-bearing capacity of the AZ-EQ6 and it is actually 25 kg.
http://www.opticstar...sp?p=0_10_2_0_3

My max conceivable load with the 8SE OTA, the ED80T and imaging paraphernalia will be <12 kg, so I'm sweet on the 50% rule too :)


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