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The AT72EDII is out!

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#476 howardcano

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Posted 24 May 2020 - 01:39 PM

Thank you very much for your efforts!

 

The Astronomics web page for the AT102ED also says it has a 2" focuser, but the drawtube ID is about 2.48" (63mm) on mine.

 

I'm thinking the same is true for the AT72ED.


Edited by howardcano, 24 May 2020 - 01:42 PM.


#477 The Luckster

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Posted 24 May 2020 - 02:40 PM

Thank you very much for your efforts!

 

The Astronomics web page for the AT102ED also says it has a 2" focuser, but the drawtube ID is about 2.48" (63mm) on mine.

 

I'm thinking the same is true for the AT72ED.

Forget my last post (deleted), ain't what you are asking for...

 

Anyway, I removed the focus adapter and felt inside the draw tube at the camera angle adapter, and I concur with your 2.48" finding.

 

jason


Edited by The Luckster, 24 May 2020 - 04:10 PM.

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#478 gwlee

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Posted 24 May 2020 - 03:13 PM

Thank you very much for your efforts!

 

The Astronomics web page for the AT102ED also says it has a 2" focuser, but the drawtube ID is about 2.48" (63mm) on mine.

 

I'm thinking the same is true for the AT72ED.

With calipers the OD of the focuser tube of my AT72ED2 measures 2.682.” If the ID, which I can’t accurately measure yet, is 2.500, “ wall thickness would be about 0.091.” Does this sound reasonable?

 

I know the ID is greater than 2.000” because 2” accessories fit into the focuser tube, and I can feel that the tube is somewhat larger, perhaps approaching 2.5.” Suspect it’s slightly less than 2.500” though or AT would be touting a 2.5” focuser. 


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#479 howardcano

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Posted 24 May 2020 - 04:26 PM

Thank you very much, Jason and GW!  That brings me one step closer to pulling the trigger on the AT72EDII when it becomes available.

 

I've only found one other possibility for my purpose: the TSED70F6.  It's got cheaper ED glass and is less expensive, but I think the focuser drawtube is narrower, and frankly I'd rather buy from Astronomics.

 

If the AT80ED had a shorter focal length, I'd buy it in an instant!


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#480 SouthernOracle

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Posted 26 May 2020 - 07:23 PM

Honestly, you should just email them at questions@astronomics.com and ask them what you need to know.  They have always been incredibly helpful and responsive any time I've had any questions.  I was curious about a few things on the AT72EDII before I ordered and they emailed back within hours.


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#481 howardcano

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Posted 27 May 2020 - 08:01 AM

Honestly, you should just email them at questions@astronomics.com and ask them what you need to know.  They have always been incredibly helpful and responsive any time I've had any questions.  I was curious about a few things on the AT72EDII before I ordered and they emailed back within hours.

I'll do that when they are back in stock.  There's always a chance that something has changed with the newest production run.




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