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#1 jkobservatory.net

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Posted 12 July 2018 - 05:13 AM

Hi everyone

I was wondering if anyone could recommend a focal reducer for the following setup

14 inch RC GSO
atik 16200 ccd
2.5 inch Moonlite focuser


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#2 akulapanam

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Posted 13 July 2018 - 12:01 AM

For a 16200 your only choice is the Riccardi Reducer/Flattener .  The M63 version will work with a Feathertouch True 3" and the M82 version will work with a Feathertouch 3.5".  Neither will work with the moonlite because the reducer needs to embedded into the focuser to get proper spacing.   I'm fairly happy with my M63 version.



#3 jkobservatory.net

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Posted 14 July 2018 - 04:02 AM

For a 16200 your only choice is the Riccardi Reducer/Flattener . The M63 version will work with a Feathertouch True 3" and the M82 version will work with a Feathertouch 3.5". Neither will work with the moonlite because the reducer needs to embedded into the focuser to get proper spacing. I'm fairly happy with my M63 version.


Thanks

From Markus ( owner of the apm ) he said the M63 Riccardi will work on a 2.5 focuser


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#4 carballada

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Posted 14 July 2018 - 07:37 AM

Thanks

From Markus ( owner of the apm ) he said the M63 Riccardi will work on a 2.5 focuser


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With a real 2.5, be careful with Moonlite.
I have a ML 2.5 and is not possible to use the M63 inside, now I am installing a Nitecrawler 3” and with this focuser is ok.

8ac62093ab9849e06931c06306809675.jpg

00588a3449a4969b66ae6d1e99917ba7.jpg

Edited by carballada, 14 July 2018 - 06:31 PM.


#5 jkobservatory.net

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Posted 14 July 2018 - 07:38 AM

Beast that nite crawler


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#6 jkobservatory.net

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Posted 14 July 2018 - 07:40 AM

With a real 2.5, be careful with Moonlite.
I have a ML 2.5 and is not possible to use the M63 inside, now I am installing a Nitecrawler 3” and with this focuser is ok.

e0d255645f9e35901faba81741aef0db.jpg

00588a3449a4969b66ae6d1e99917ba7.jpg


Are you using a 10 inch RC? I used to have a Altair 250tt few years back.

How are you collimating your RC




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#7 jkobservatory.net

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Posted 14 July 2018 - 07:53 AM

With a real 2.5, be careful with Moonlite.
I have a ML 2.5 and is not possible to use the M63 inside, now I am installing a Nitecrawler 3” and with this focuser is ok.

e0d255645f9e35901faba81741aef0db.jpg

00588a3449a4969b66ae6d1e99917ba7.jpg


You could screw it on as suppose to sinking it in.


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#8 carballada

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Posted 14 July 2018 - 07:55 AM

Yes.... it’s an Altair 250 v2 (with the focuser not connected to the mirror)

I use a Takahashi microscope, laser collimator and test star with artificial star from geoptik.

#9 carballada

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Posted 14 July 2018 - 08:00 AM

Please review this post

https://www.cloudyni...backfocus-help/


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#10 jkobservatory.net

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Posted 14 July 2018 - 03:38 PM

Please review this post

https://www.cloudyni...backfocus-help/


Thanks for that. I might look to upgrade to a feather touch now.

Do you think this would be a good one http://starlightinst...t&product_id=57


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#11 akulapanam

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Posted 15 July 2018 - 12:08 AM

Thanks for that. I might look to upgrade to a feather touch now.

Do you think this would be a good one http://starlightinst...t&product_id=57


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If it will fit.  I have a True 3" and that is what I would recommend.



#12 jkobservatory.net

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Posted 15 July 2018 - 12:49 PM

If it will fit. I have a True 3" and that is what I would recommend.


What exact version do you have?


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#13 akulapanam

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Posted 15 July 2018 - 10:08 PM

What exact version do you have?


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This guy.

http://starlightinst...&product_id=411

#14 jkobservatory.net

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Posted 16 July 2018 - 08:45 AM

[quote name="akulapanam" post="8705172" timestamp="1531710511"]This guy.

http://starlightinst...&product_id=411[/quote

This one a 14 inch or 12 inch


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#15 joelkuiper

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Posted 16 July 2018 - 05:05 PM

Wow that night craweler is huge. I thought the 2,5" moonlite was big.



#16 akulapanam

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Posted 16 July 2018 - 11:01 PM

[quote name="jkobservatory.net" post="8705742" timestamp="1531748702"]

[quote name="akulapanam" post="8705172" timestamp="1531710511"]This guy.

http://starlightinst...&product_id=411[/quote

This one a 14 inch or 12 inch


Sent from my iPhone using Tapatalk[/quote]

I had a GSO Truss tube 10” and I have a Officina Stellare 10” RC now. The big question is if the 3.5” will block the tilt adjustment on the GSO. If you can do the 3.5” then I would do the m82 version of the Riccardi because the corner stars will be better.
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#17 jkobservatory.net

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Posted 16 July 2018 - 11:03 PM

ame="jkobservatory.net" post="8705742" timestamp="1531748702"]



I had a GSO Truss tube 10” and I have a Officina Stellare 10” RC now. The big question is if the 3.5” will block the tilt adjustment on the GSO. If you can do the 3.5” then I would do the m82 version of the Riccardi because the corner stars will be better.


Cheers buddy I will certainly look into it


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#18 jkobservatory.net

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Posted 17 July 2018 - 01:54 PM

Spoken to apm today and there can ship me a 3 inch 1.5 tube length focuser half the price of a feather touch


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#19 drmikevt

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Posted 17 July 2018 - 10:34 PM

Spoken to apm today and there can ship me a 3 inch 1.5 tube length focuser half the price of a feather touch


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Yes, but half the price and half the rigidity...?  

 

And, I also think that the AP 27TVPH (.75x) works well with RC's and gives an image circle plenty big for a 16200 chip.  Anyone know why this reducer would not work?



#20 akulapanam

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Posted 17 July 2018 - 10:43 PM

Yes, but half the price and half the rigidity...?  

 

And, I also think that the AP 27TVPH (.75x) works well with RC's and gives an image circle plenty big for a 16200 chip.  Anyone know why this reducer would not work?

The AP is a reducer only and not a flattener.  Its a big difference beyond middle of the field on a 16200.

 

Agree the focuser is pretty critical.  The differences in some components like cameras (say SX or FLI vs QHY) is pretty minor but the difference between focusers is huge.  My Moonlite was a huge upgrade over my GSO focuser, Feathertouch a big upgrade over Moonlite, and Optec LEO a major upgrade over the Feathertouch.  I don't think I would go cheap in this area.


Edited by akulapanam, 17 July 2018 - 10:43 PM.


#21 jkobservatory.net

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Posted 18 July 2018 - 01:08 PM

The AP is a reducer only and not a flattener. Its a big difference beyond middle of the field on a 16200.

Agree the focuser is pretty critical. The differences in some components like cameras (say SX or FLI vs QHY) is pretty minor but the difference between focusers is huge. My Moonlite was a huge upgrade over my GSO focuser, Feathertouch a big upgrade over Moonlite, and Optec LEO a major upgrade over the Feathertouch. I don't think I would go cheap in this area.


Interesting. Doesn’t it state on the product reducer/flattener?

I am now looking to upgrade with the Leo Focuser


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#22 akulapanam

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Posted 18 July 2018 - 02:42 PM

Interesting. Doesn’t it state on the product reducer/flattener?

I am now looking to upgrade with the Leo Focuser


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The AP is a reducer only. The Riccardi is both.
http://www.astro-phy...o_acc/photo_acc

I should clarify I didn’t put the LEO on the RC just on the RiFast and RH. The RC has pretty long backfocus. If you can use the Leo with the RC I definitely would though.

#23 jkobservatory.net

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Posted 18 July 2018 - 02:43 PM

The AP is a reducer only. The Riccardi is both.
http://www.astro-phy...o_acc/photo_acc

I should clarify I didn’t put the LEO on the RC just on the RiFast and RH. The RC has pretty long backfocus. If you can use the Leo with the RC I definitely would though.


Thanks for clarifying. :)


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