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2" vs 1.25" for EAA

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30 replies to this topic

#26 millsbob

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Posted 20 July 2021 - 01:44 PM

thanks, but as noted in my sig, it's a 294mc, not a cooled camera, and i plan to stick with non-cooled cameras.

 

the idea of adding a refractor to the mix has definitely been in my mind, though, and i have one that Errol recommended on my wish list at Astronomics.

 

btw, i can't view the diagonal link you kindly provided in either Safari or Chrome. does the link work for anyone else?


Edited by millsbob, 20 July 2021 - 01:53 PM.


#27 GazingOli

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Posted 20 July 2021 - 01:57 PM

>  although it doesn't appear that either of those allow for rotating the camera. <

 

I think they do: the ring with the thread is loose so you can rotate the adaptor before you tighten the ring. It is the same with the Bresser. Maybe you double check before ordering. However you will need some T2 spacers as well.

 

I never needed to use a diagonal with the camera at the CPC. Just try without first! (be careful when slewing to the Zenit)

 

CS.Oli


Edited by GazingOli, 20 July 2021 - 02:06 PM.

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#28 nic35

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Posted 20 July 2021 - 03:14 PM

Apologies - I here's one that works  https://www.celestro...with-twist-lock

 

I've found that if you copy a link from another post (as I did), it often/sometimes/always fails to work.

 

j


Edited by nic35, 20 July 2021 - 03:15 PM.

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#29 roelb

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Posted 21 July 2021 - 05:56 PM

Even using the non-cooled "294" and the f/6.3 reducer you will hit the mount because you need a backfocus of 105 mm to reach the 6.3 reduction.

The suggestion to use a 2" diagonal is still  a valid one.


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#30 Stargazer3236

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Posted 11 August 2021 - 09:15 AM

what do you want a barlow for? f/20 is rather unusual for EAA, it is more for planetary imaging.

 

CS.Oli

I just received my Orion XX14g a few weeks ago. I tried some EAA imaging with a 2x barlow and got good results, especially since i was hunting down planetary nebula. The scope is 14" F/4.6, so the barlow gave me F/9.2. I use 3x and 5x barlows for the planets, but 2x is perfect for DSO's.


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#31 GazingOli

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Posted 11 August 2021 - 10:27 AM

you are right for PNs, I must admit that I tried that with my CPC800 already - and will do so again as I said in another thread.

 

CS.Oli




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