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Stellarvue AP50 ED APO or AT65EDQ?

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#1 Alfredo Beltran

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Posted 08 October 2012 - 05:36 PM

Hi

If doing widefield imaging with a CCD camera with small chip size like Atik 428 EX, would you prefer the Stellarvue AP50 ED APO or AT65EDQ and why?

Stellarvue: http://www.stellarvue.com/sv50.html
Astrotech: https://www.astronom...ope_p18437.aspx

Both acopes are exactly the same price, so price is not an issue.

Thanks for your help

Alfredo

#2 Coastal

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Posted 08 October 2012 - 05:59 PM

The 428EX is pretty easy on optics. I own one, and until recently also an AT65EDQ. If you ever use a CCD with a larger sensor you won't have to worry about a field flattener with the '65. For that reason alone it gets my vote.

EDIT: unless they've changed it, the stock focuser on the AT65EDQ is great. With a retrofit stepper you're set.

#3 Alfredo Beltran

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Posted 08 October 2012 - 06:51 PM

Hi Coastal

That's a very good reason.

One question: what is a retrofit stepper?

Best regards

Alfredo

#4 Coastal

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Posted 08 October 2012 - 07:01 PM

Before I even received the telescope I bought a 2" Moonlite focuser for it with a stepper motor. Now you can buy a Rigel Systems stepper motor that attaches to the focuser if you want to be able to use automated focusing, and you won't have to spend more than the cost of the OTA doing so. I sold the 65 because its focal length overlaps somewhat with my hyperstar and I can't afford a divorce.

#5 Alfredo Beltran

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Posted 08 October 2012 - 07:16 PM

Ok I see

I have a microtouch focuser with a feathertouch for my C6 SCT. I just didn't know the term.

The small APO would be a secondary scope to the C6 SCT. I've considered hyperstar but I know I'll do narrow band imaging in the futureand don't want to deal with changing filters manually.

One of the main options would be the 428 mono and would like to have a scope that allows the bigger objects to fit in the small sensor.

Best regards

Alfredo

#6 Agelos Kechagias

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Posted 09 October 2012 - 12:49 AM

Any clue about optics of stellarvue ap50 ?

#7 MPT

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Posted 09 October 2012 - 07:39 AM

I have not used the AP50, but love my little AT65EDQ. Its a painless scope to image with. It has a nice and flat image, great results, and the stock focuser holds my st8300 and fw8 with no problems.

#8 JoseBorrero

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Posted 09 October 2012 - 10:28 AM

Any focal reducer for the SV50?

#9 Alfredo Beltran

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Posted 09 October 2012 - 11:09 AM

Any focal reducer for the SV50?


I don't think so because it already has 330 mm of FL. I'm not sure if it needs a flattener.

Best regards

Alfredo

#10 kyang

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Posted 16 January 2013 - 04:27 AM

Hello,

I am in the same boat of deciding between these two.
Instead of using a CCD, I am going to start with DSLR and this is going to be my first AP setup (with iEQ30).

I read somewhere (cannot find it anymore) about the focuser issue on AT65EDQ. Do you guys have moreinformation about this ? Is the 10mm aperture difference going to make any difference ? Thanks.

[Edit]: Oops... Just realized that this is in the CCD forum... sorry for hijacking this. :bow:

-Kai

#11 David Ault

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Posted 17 January 2013 - 12:07 AM

I can't speak to the SV50, but I really enjoy my AT65EDQ. I've been able to produce some images I'm very happy with (see my signature). My focuser did have problems though and I eventually replaced it with a MoonLite with the stepper motor and controller. No amount of twiddling with any of the adjustment screws helped reduce the differential flexure or sag I detected.

Regards,
David






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