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08-27-2015, 12:20 PM   #1
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724mm f/2.2 lens available

Seriously!

https://www.astronomics.com/11-f22-rowe-ackermann-schmidt-astrograph-rasa-op...be_p20206.aspx

Michael

errata: it appears to be "just" a 620mm f/2.2. I'd put a 1.4x teleconverter on that puppy and have an 868mm f/3.5


Last edited by MJSfoto1956; 08-27-2015 at 01:04 PM.
08-27-2015, 12:28 PM   #2
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Minor correction? 620mm per the blurb.
QuoteQuote:
It’s not only missing something that comes with virtually every telescope ever produced . . . an eyepiece . . . it doesn’t even have a place to put an eyepiece. That’s because the 620mm focal length f/2.22 Celestron 11” RASA is strictly a deep space imaging scope and cannot be used visually.
08-27-2015, 12:30 PM   #3
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But does it have nice bokeh?
08-27-2015, 12:31 PM   #4
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QuoteOriginally posted by boriscleto Quote
But does it have nice bokeh?
LOL - since it is almost always shot at infinity (I would imagine) I would say "no". That and it's a mirror lens and even with correction I would expect donut shaped highlights.

08-27-2015, 01:00 PM   #5
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Seems to me you could focus this puppy using the FluCard.
(N.B. the email I received mentioned 724mm, sorry for the confusion)

Michael

Last edited by MJSfoto1956; 08-27-2015 at 01:28 PM.
08-27-2015, 02:07 PM   #6
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QuoteOriginally posted by MJSfoto1956 Quote
Seems to me you could focus this puppy using the FluCard.
The focuser is on the rear cell of the scope. The camera stays affixed to the front glass while the rear mirror moves to focus. There are autofocus motors that can be added to a telescope but the controller software only works with specialized astronomy CCD cameras and Canon DSLRs AFAIK.

That 11" wide f2.2 is not the only option. You can Hyperstar modify 6" through 14" wide telescopes to get 290mm f1.9 through 684mm f1.9 arrangements. Product Categories

08-27-2015, 02:22 PM   #7
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QuoteOriginally posted by DeadJohn Quote
The focuser is on the rear cell of the scope. The camera stays affixed to the front glass while the rear mirror moves to focus. There are autofocus motors that can be added to a telescope but the controller software only works with specialized astronomy CCD cameras and Canon DSLRs AFAIK.
Agreed. I meant that you could use the FluCard to "see" the effects of your focusing, whether manual or motorized.

Michael
08-27-2015, 03:38 PM   #8
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35lb optical tube. I want to attach a Q to it~!

08-27-2015, 05:08 PM   #9
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It will fit the pending FF, right?
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