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focal reducer

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#1 rainysoon

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Posted 03 January 2021 - 01:41 AM

Any suggestion for focal reducer for meade LX200 ACF 10 inch. Thanks in advance.

#2 Tapio

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Posted 03 January 2021 - 01:50 AM

https://www.cloudyni...lescope-optics/



#3 trigger

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Posted 03 January 2021 - 02:10 AM

either the Celestron 6.3 or the meade 6.3 will work.



#4 Tapio

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Posted 03 January 2021 - 04:37 AM

Like in the link I posted Celestron or Meade reducer is not a good choice for ACF scope.
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#5 michael8554

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Posted 03 January 2021 - 08:50 AM

The Celestron and Meade 0.63 Reducers were designed for classic SCT's.

 

So not a good match for the ACF modification to the SCT design, hence the need for the bespoke Optec Lepus Reducer 

 

But there are some on this site that say they do work.

 

Are you Visual or Imaging rainysoon ?



#6 rainysoon

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Posted 03 January 2021 - 11:28 AM

Mainly for imaging.

#7 Sammy

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Posted 03 January 2021 - 11:38 AM

either the Celestron 6.3 or the meade 6.3 will work.


The ACF are already corrected... Those FRs will not work...

#8 alphatripleplus

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Posted 03 January 2021 - 01:22 PM

What size sensor are you planning to use? If you use a reducer not designed for the scope, any aberrations (from a mismatch of the scope and reducer) are going to be more noticeable with larger sensors, i.e. it is possible you may find them acceptable with a smaller sensor camera.



#9 NoDarkSkies

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Posted 03 January 2021 - 03:00 PM

I used the Meade version on my 10" & 12" LX200GPS with the STB ST-2000XM Camera back between 2003-2005.

But "NOTE: Not for use with Meade Advanced Coma-Free optics." Meade Link


Edited by NoDarkSkies, 03 January 2021 - 03:06 PM.


#10 jmiller1001

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Posted 04 January 2021 - 12:36 PM

I use both the Antares and the Optec Lepus on my 10" Meade ACF and recently had a bake-off of the images on CCD Inspector (ASI1600 Chip) and found significant difference - both had round stars corner to corner.  YMMV



#11 rainysoon

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Posted 06 January 2021 - 10:41 PM

I brought Antares but visually not working. Need to check with imaging. 



#12 alphatripleplus

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Posted 07 January 2021 - 08:22 AM

When you say it is not working visually, do you mean you can't get  focus with it, or that you have aberrations at the edge of the field but are good at the centre, or something else?



#13 rainysoon

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Posted 07 January 2021 - 11:01 AM

I could not see any stars, tried focussing as much as I can. Need to see how moon looks like. 



#14 alphatripleplus

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Posted 07 January 2021 - 12:56 PM

Have you been able to focus on a distant daytime object with the reducer in place? The focus point with the reducer may be far from the focus point without. (Focusing  on  a distant object in the daytime may be easier to get (at least approximately) than trying from scratch at night.)



#15 rainysoon

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Posted 07 January 2021 - 02:24 PM

Have you been able to focus on a distant daytime object with the reducer in place? The focus point with the reducer may be far from the focus point without. (Focusing  on  a distant object in the daytime may be easier to get (at least approximately) than trying from scratch at night.)

Thank you, Will try and post my findings. 


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#16 rainysoon

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Posted 06 February 2021 - 07:12 PM

Antares f6.3 focal reducer works with meade lx200 ACF imaging. Camera Meade Deep sky imager 4.

#17 Tapio

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Posted 06 February 2021 - 10:31 PM

It can work with small sensor like DSI but not likely with larger.

#18 PJBilotta

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Posted 14 February 2021 - 01:02 PM

since the ACF is already well corrected and the f/6.3 RCs don't work well with them, you might try a basic .5x focal reducer like this: https://agenaastro.c...al-reducer.html

 

$25 for a 1.25" or $50 for a 2", and reports are they work very well for imaging.



#19 rainysoon

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Posted 25 February 2021 - 02:32 PM

Astro-physics CCDT67 and Antares F6.3 both works fine. With CCDT67, the focal length reduced from 2500 to 1797, with Antares reduced to 1850, may be due to back focus. Both attached to the moon lite focuser, 




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