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Little refractor

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#1 divers

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Posted 28 January 2021 - 08:43 AM

I currently have the Stellarvue Access 80 with the 0.8x reducer/flattener so gets me to 480mm using my t7i DSLR.

 

I bought a used skyguider pro (with ipolar) (zwo461 and 30mm guidescope) and upgraded everything to WO.  It is now a very robust system.  While I am pretty sure I could get away with 480, my life would be simpler it I got something faster.  A quick search -

 

Redcat 51....250ish focal length...$750

Sharpstar 61EDPHII f/5.5 with 0.8 reducer 270ish focal length.....$700

Raptor 61 - seems over priced

 

I really want to stay 5lbs or less....

 

Is there a generally accepted "best small refractor".  I can spend around $1k (tops).

 

Thanks for any guidance or advice on the topic of small refractors :) 


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#2 Cali

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Posted 28 January 2021 - 09:23 AM

Seems CNers rave about this one.

 

- Cal



#3 divers

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Posted 28 January 2021 - 09:25 AM

Need less than 5 lbs....and high quality.  Thanks.



#4 qswat72

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Posted 28 January 2021 - 09:34 AM

The Sharpstar and Raptor are basically identical scopes, with the Raptor definitely being on the high side price wise. I have also heard issues with the Sharpstar in regards to chromatic aberration, not sure if it carries over to the Raptor though. I have heard good things about the Redcat. The only real downside I’ve heard of is the focuser which is probably fine for most people, but some aren’t a fan.
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#5 peta62

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Posted 28 January 2021 - 09:35 AM

Is this ED too small ?

https://www.teleskop...oducts_id/11022



#6 JumboFlex

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Posted 28 January 2021 - 09:40 AM

Televue 60? 
 

I have one and it’s a neat little scope.  Don’t image with it it but have considered it. I think they used to make an “is” version for imaging. 
 

EDIT: seems like this one doesn’t have the imaging accessories made for it like other TV scopes, so maybe not so good. 


Edited by JumboFlex, 28 January 2021 - 09:46 AM.

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#7 kel123

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Posted 28 January 2021 - 10:07 AM

Seems CNers rave about this one.

- Cal


Seems CNers rave about this one.

- Cal


I guess you didn't read his post. He already owns a 480mm, F/7 scope and wants something shorter and lighter at about 5 lbs and you pointed him towards an F/7, 9 lbs scope of 714 mm.
I don't know your reason for the post but such posts are not only unhelpful but unfair.
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#8 kel123

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Posted 28 January 2021 - 10:12 AM

I currently have the Stellarvue Access 80 with the 0.8x reducer/flattener so gets me to 480mm using my t7i DSLR.

I bought a used skyguider pro (with ipolar) (zwo461 and 30mm guidescope) and upgraded everything to WO. It is now a very robust system. While I am pretty sure I could get away with 480, my life would be simpler it I got something faster. A quick search -

Redcat 51....250ish focal length...$750
Sharpstar 61EDPHII f/5.5 with 0.8 reducer 270ish focal length.....$700
Raptor 61 - seems over priced

I really want to stay 5lbs or less....

Is there a generally accepted "best small refractor". I can spend around $1k (tops).

Thanks for any guidance or advice on the topic of small refractors :)


Apart from the ones you listed, you might want to consider this pezval design.

SKY ROVER 70mm F/5 Super Astrograph V3
https://a.aliexpress.com/_mL5E6Y1

#9 LDW47

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Posted 28 January 2021 - 11:06 AM

Take a look at the Svbony models for a lot less, many rave about them ! Doesn’t hurt to look, to research.


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#10 Hesiod

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Posted 28 January 2021 - 12:00 PM

If are thinking to aa mid-term plan could give a look to this one as well

 

https://global.vixen...roduct/26201_4/

 

With your aps-c sensor will have to crop a bit the angles due to field curvature but the telescope is excellent both optically and mechanically.

It is around 1kg and works extremely well with compact star trackers

gallery_215679_8115_2777043.jpg

gallery_215679_8115_1458202.jpg

 

Furthermore it has both a dedicated flattener and a reducer (not cheap but brilliant in performances and design)


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#11 NYJohn S

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Posted 28 January 2021 - 12:48 PM

There's the AT72EDII 430mm f/6. It's 4.8 pounds with the rings & dovetail. With the 0.8x reducer/flattener it becomes 344mm f/4.8  https://www.astronom...fpl-53-f-6.html

 

If you want something smaller there's the AT60ED. https://www.astronom...ed-doublet.html

 

0.8X REDUCER/FIELD FLATTENER https://www.astronom...refractors.html


Edited by NYJohn S, 28 January 2021 - 01:06 PM.

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#12 divers

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Posted 28 January 2021 - 12:52 PM

Canon 200mm f/2.8 - Might just go with this camera lens.....


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#13 NYJohn S

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Posted 28 January 2021 - 01:08 PM

Canon 200mm f/2.8 - Might just go with this camera lens.....

Nice thing about that is you can use it for daytime shooting as well.


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#14 teashea

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Posted 28 January 2021 - 02:21 PM

You might consider a Takahashi FS-60Q.  I recently went searching for the best 60 mm that is available and that is what I wound up purchasing.  It is the little puppy on the floor in front that is waiting for its tripod to come from Japan.

 

Taks.jpg


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#15 divers

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Posted 28 January 2021 - 02:37 PM

You might consider a Takahashi FS-60Q.  I recently went searching for the best 60 mm that is available and that is what I wound up purchasing.  It is the little puppy on the floor in front that is waiting for its tripod to come from Japan.

 

attachicon.gifTaks.jpg

Looked at it...but over $1100 I thought there were "cheaper" but equal choices.  You do pay a little premium for the name I think.


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#16 Hesiod

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Posted 28 January 2021 - 04:43 PM

The FSQ60 is not exactly the best choice for your purpose because it is very slow (yes, can remove the Q module and will have the plain FS60 but at this point why get the Q in the first place...)

If were interested to a visual telescope I would have suggested the FOA60.

As an astrograph I see little point in getting the FS60 over the FL55 (except for the fact that will save a tiny amount of money with the Tak) because the latter has a better focuser and better photographic accessories (which I rate higher than those of the FC100DF, which in turn are better than those of the FS60).

 

Mind that little "boutique" refractors like the FL55, FS60 etc...give their best if coupled with a field flattener, so think it makes sense to purchase them if are also interested in stargazing (optically are superb little things) or have a mid-term plan involving the purchase of those accessories.

Reducers may be nice but mind that at the same price may likely find a second hand EF200: IME not as clear as the FL55 reduced but undoubtedly faster and smaller.

 

By the way, your plan for the EF200 is very sound: with this you could get rid off the guiding system,lightening sensibly the setup, and its massive advantage in speed is pure gold if have a limited amount of time to collect the subs (4 hours at f/4 are two hours at f/2.8).


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#17 divers

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Posted 29 January 2021 - 03:02 PM

So...I decided to go with Rokinon 135mm F2.0 ED UMC Telephoto Lens.  With my 1.6 crop factor I will get the field of view of 216mm which will be nice.  $479.


Edited by divers, 29 January 2021 - 03:02 PM.

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#18 LDW47

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Posted 30 January 2021 - 02:42 PM

Looked at it...but over $1100 I thought there were "cheaper" but equal choices.  You do pay a little premium for the name I think.

Big time !



#19 kmparsons

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Posted 30 January 2021 - 03:02 PM

My travel scope is the AT60ED. It is optically and mechanically excellent. With a 2" dielectric diagonal it shows everything you could expect a 60mm to show, for less than half of your 1K budget! 



#20 25585

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Posted 30 January 2021 - 03:14 PM

You might consider a Takahashi FS-60Q.  I recently went searching for the best 60 mm that is available and that is what I wound up purchasing.  It is the little puppy on the floor in front that is waiting for its tripod to come from Japan.

 

attachicon.gifTaks.jpg

All FOA-60s sold out?


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#21 teashea

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Posted 30 January 2021 - 07:59 PM

All FOA-60s sold out?

Yes - none available..... in the US anyway.




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