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Meade 10” ACF UHTC ?

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#1 Bill001

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Posted 23 June 2021 - 07:59 PM

Any owners out there? Do you like the Meade 10” AFC?  Is the field flat as they say.  Is the mirror free of flip?

 

thnx

B



#2 555aaa

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Posted 23 June 2021 - 09:16 PM

I have one. It has a pretty good field across about a 25mm diameter but isn’t flat field. It’s a coma corrected design. It’s still worthwhile to use a full frame sensor because the fov is small. You need all you can get.

#3 Bill001

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Posted 23 June 2021 - 09:22 PM

Are you using a full frame camera with it?  

 

is the mirror free of flop?  How is the Focuser?

 

thnx



#4 555aaa

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Posted 23 June 2021 - 10:30 PM

Yes full frame. There isn’t much mirror flop. Not enough to lose collimation. Focuser is pretty good. The 16 is where you need an external focuser but on the 10 the mirror is small enough it’s not an issue.
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#5 jgraham

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Posted 24 June 2021 - 08:17 AM

I have a 12" f/8 ACF and a relatively new 10" non-ACF f/10 as well as 6", 8", 12" f/10 ACFs. The ACF optics group are wonderful! I use a full-frame camera with my 12" f/8 ACF (Nikon 610a, and soon an EOS Ra) and there's just a smidge of roll-over in the corners and the field is flat across the imaging circle. Wonderful imaging platform! Mirror shift is almost nil and I only see it when shifting directions so I use the olde set the final focus turning counterclockwise trick. For precise work I use a trusty Meade zero-shift micro-focuser. The internal Crayford on the LX850 models (my 12" f/8 ACF is from LX850 production, my 12" f/10 ACF is from LX90 production) is very solid with no visible image shift.

 

The current SCT production across the boards is really nice.

 

Enjoy!


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#6 Bill001

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Posted 24 June 2021 - 10:55 AM

I have a 12" f/8 ACF and a relatively new 10" non-ACF f/10 as well as 6", 8", 12" f/10 ACFs. The ACF optics group are wonderful! I use a full-frame camera with my 12" f/8 ACF (Nikon 610a, and soon an EOS Ra) and there's just a smidge of roll-over in the corners and the field is flat across the imaging circle. Wonderful imaging platform! Mirror shift is almost nil and I only see it when shifting directions so I use the olde set the final focus turning counterclockwise trick. For precise work I use a trusty Meade zero-shift micro-focuser. The internal Crayford on the LX850 models (my 12" f/8 ACF is from LX850 production, my 12" f/10 ACF is from LX90 production) is very solid with no visible image shift.

 

The current SCT production across the boards is really nice.

 

Enjoy!

 

Do you know the thread size on that rear port?  I wonder if at least my Lumicon 2” diagonal (Celestron C8) will work.  Then are you using M48 spacers as far back as possible?



#7 carolinaskies

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Posted 24 June 2021 - 02:46 PM

Do you know the thread size on that rear port?  I wonder if at least my Lumicon 2” diagonal (Celestron C8) will work.  Then are you using M48 spacers as far back as possible?

There has been no change to the rear port threads so should be no issue whether classic SCT like the C8 or the ACF.  


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#8 jgraham

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Posted 24 June 2021 - 04:46 PM

+1

Yep, standard SCT rear threads.

#9 rmollise

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Posted 25 June 2021 - 01:43 PM

Any owners out there? Do you like the Meade 10” AFC?  Is the field flat as they say.  Is the mirror free of flip?

 

thnx

B

While I don't own one, I have used one frequently and it is one of my favorite SCTs of all time. No, its field may not be quite as perfect as that of the Celestron Edge, but you will never notice the difference. If you get the model with the internal Crayford, you shouldn't have any flop (which I assume is what you meant). :)




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