Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

TS (Sharpstar) 140mm triplet F6.5

  • Please log in to reply
44 replies to this topic

#1 25585

25585

    Cosmos

  • *****
  • topic starter
  • Posts: 7,993
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 30 January 2020 - 04:21 PM

https://www.teleskop...-Elementen.html

 

This scope seems like a dream rich field, with double ED, and 10mm more aperture than a Takahashi TOA-130.

 

Does or has anyone use the STA 140mm? 


Edited by 25585, 30 January 2020 - 04:24 PM.

  • zjc26138 and MirkoV69 like this

#2 F.Meiresonne

F.Meiresonne

    Fly Me to the Moon

  • *****
  • Posts: 5,453
  • Joined: 22 Dec 2003
  • Loc: Eeklo,Belgium

Posted 31 January 2020 - 06:27 AM

Impressive scope! Has even a 4" focusser.

I could not mount it though for the moment, it is a hefty 11.5 kg.

 

Sharpstar really makes nices scopes.


  • RogerLaureys, zjc26138, HydrogenAlpha and 1 other like this

#3 Der_Pit

Der_Pit

    Apollo

  • *****
  • Posts: 1,286
  • Joined: 07 Jul 2018
  • Loc: La Palma

Posted 04 February 2020 - 02:51 PM

I'm running circles around the web pages of both Sharpstar and TS since 1-2 months, but couldn't yet make up my mind.  But if I go for a new refractor this year, it's going to be this one....


  • HydrogenAlpha, 25585 and MirkoV69 like this

#4 MirkoV69

MirkoV69

    Lift Off

  • -----
  • Posts: 17
  • Joined: 27 Jan 2020

Posted 15 February 2020 - 08:37 AM

Yesterday I had time to visit the TS shop in Von-Myra-Straße I was shown the telescope.

I was told it was the prototype used bay technichians but the first batch is coming in 2 weeks

 

No wonder there are not many around

 

It is hefty and impressive, mechanically well build. no chance to look through it thoug

 

Regards

Mirko


  • psandelle, 25585 and Der_Pit like this

#5 Der_Pit

Der_Pit

    Apollo

  • *****
  • Posts: 1,286
  • Joined: 07 Jul 2018
  • Loc: La Palma

Posted 20 February 2020 - 08:54 AM

Now that is interesting, as they are listing it as 'ready to ship' - Do you get the prototype if you order now?

 

Did you ask questions about the flattener/reducer?



#6 stevew

stevew

    Now I've done it

  • *****
  • Posts: 6,341
  • Joined: 03 Mar 2006
  • Loc: British Columbia Canada

Posted 22 February 2020 - 02:31 PM

From what I can see the 4 inch focuser looks similar to the one on my TMB130..

Attached Thumbnails

  • Picture 385.jpg

  • 25585 likes this

#7 Der_Pit

Der_Pit

    Apollo

  • *****
  • Posts: 1,286
  • Joined: 07 Jul 2018
  • Loc: La Palma

Posted 22 February 2020 - 02:53 PM

From what I can see the 4 inch focuser looks similar to the one on my TMB130..

Hmmm, do you really think?  This is from Sharpstars website:

1568871131.jpg

 

As for TS:  I asked there, and indeed they are waiting for the first ones to arrive (no idea why they flag it as 'ready to ship' then...), and only then intend to update the webpage regarding flatteners/reducers... 

Time to be patient, I guess...


  • 25585 likes this

#8 MirkoV69

MirkoV69

    Lift Off

  • -----
  • Posts: 17
  • Joined: 27 Jan 2020

Posted 23 February 2020 - 05:20 AM

Now that is interesting, as they are listing it as 'ready to ship' - Do you get the prototype if you order now?

 

Did you ask questions about the flattener/reducer?

Hello 

 

They brought up the prototype from the lab just for me to have a look at dimensions/proportions , it was not on sale.

He mentiond the production batch was arriving in 2 weeks.

 

I did not ask about the flattner/reducer but I see on the specs page they are suggesting a 0.75x 3" reducer

I assume it is this one:

 

https://www.teleskop...cts_id=5120#cs 

 

Mirko


  • 25585 likes this

#9 Der_Pit

Der_Pit

    Apollo

  • *****
  • Posts: 1,286
  • Joined: 07 Jul 2018
  • Loc: La Palma

Posted 25 February 2020 - 10:15 AM



Hello 

 

They brought up the prototype from the lab just for me to have a look at dimensions/proportions , it was not on sale.

He mentiond the production batch was arriving in 2 weeks.

 

I did not ask about the flattner/reducer but I see on the specs page they are suggesting a 0.75x 3" reducer

I assume it is this one:

 

https://www.teleskop...cts_id=5120#cs 

 

Mirko

Thanks for the update!

 

The reducer seems to be a 2.5" one.  They have a 3" one, but that's 0.79× .   The description rather sounded like the 'native' Sharpstar reducer for this scope, the 140PH reducer.   But TS didn't confirm if they intend to (also) offer that one...

 

So for now I'm waiting for more info on the web page



#10 LRSibb

LRSibb

    Lift Off

  • -----
  • Posts: 19
  • Joined: 01 Feb 2019

Posted 04 March 2020 - 12:44 PM

Waiting on Reducer and 2.5 " flattener.

 

Sharpstar YYC1.jpg

 

 


  • zjc26138, GlenM, psandelle and 5 others like this

#11 Der_Pit

Der_Pit

    Apollo

  • *****
  • Posts: 1,286
  • Joined: 07 Jul 2018
  • Loc: La Palma

Posted 04 March 2020 - 02:36 PM

Whee!

Did you order from Sharpstar directly?  Does the EAF standard bracket fit the focuser, or did you need to do adaptions?

 

TS has some updates on the webpage, suggesting you get a set of adapter rings, and a test protocol.

I'm still not sure what flatener to get.  I do have the 2" one from TS for my Stowaway, maybe just start with that?



#12 LRSibb

LRSibb

    Lift Off

  • -----
  • Posts: 19
  • Joined: 01 Feb 2019

Posted 04 March 2020 - 03:24 PM

I bought it here in Alberta from All Star Telescope - https://www.all-startelescope.com/ They are a now a regional dealer for Sharpstar. The EAF works with the standard bracket with one screw- will need to improve this I think although it is quite rigid as is and it tests fine. I have the other bracket for the EAF but haven't tried it yet (need to dig through accessory box).

 

I can see the TS website - but something may be lost in translation - could you point me to their recommendations?

 

I exchanged email with MIchael at Sharpstar - and they recommend the 2.5 inch APO flattener on their site - it is not optimized for the 140 but should work well for APS-C and smaller sensors (like your 1600MM Pro which I have also). I am also going to get the recommended 140PH reducer from All Star. I am going to test a different flattener also - just for fun while I wait for an Orion Thin OAG and the Sharpstar flatteners  (the ZWO OAG I have only illuminates a portion of the 174 MM mini guide camera I have). 


  • Der_Pit likes this

#13 Der_Pit

Der_Pit

    Apollo

  • *****
  • Posts: 1,286
  • Joined: 07 Jul 2018
  • Loc: La Palma

Posted 04 March 2020 - 03:38 PM

No, nothing lost on the TS website - it still is mostly empty, they do not yet have the first batch delivered, and said they would add recommendations once they have them in hand.

I definitely want the 140PH reducer, but to start with it has lower priority, I'm rather aiming at the full focal length.  And if my 2" flatener can cope with the F/5 of my A-P, it should handle F/6.5 fine, too, without vignetting.

 

Looking impatiently forward to your first light report laugh.gif waytogo.gif



#14 nva

nva

    Mariner 2

  • -----
  • Posts: 202
  • Joined: 01 Sep 2018

Posted 05 March 2020 - 03:29 PM

If you can give a little visual review as well it would be much appreciated!

#15 LRSibb

LRSibb

    Lift Off

  • -----
  • Posts: 19
  • Joined: 01 Feb 2019

Posted 05 March 2020 - 07:10 PM

SHSt 140 PH 2.jpg I haven't had a scope like this before, but my impression of the fit and finish is that both are excellent. Painted and metal finish surfaces are very high quality to my eye.

 

The optics arrived clean, with no issues apparent. it is packed inside the foam padded carrying case which is supported by foam inserts so no problems there. 

 

There is a nice camera rotator collar that moves smoothly.  

 

The massive focuser scared me a bit (JK) but it is beautiful with cascading connection pieces fitting well. 

 

Focuser is not stiff but firm, My ZWO EAF moves it easily even when near vertical. 

 

I am getting the 2.5 " non-APO specific Flattener directly from Sharpstar. It should be here next week It will screw directly in to the M68 male thread on the connection train. For now I am using a 2 inch flattener that slides into the back.  

 

Since we have a  Orion 80 EDCF (480 mm fl) and an Celestron Edge 8inch (2032 mm fl), this scope fills a void in imaging field as well as the hope for higher quality images Getting the 0.73 f 4.8 140PH reducer from All Star as well when it arrives so can be versatile with FOV 

 

Testing it on my Hypertuned CGEMII it moves well and a quick guiding check last night gave sub 1 arc-sec rms at full focal length (reasonable seeing last night) with non-tweaked setup. Hope to upgrade mount eventually but the hypertuning will get us through a year of imaging quite well I think. 

 

 

 

 

 


  • Jacques, F.Meiresonne, zjc26138 and 6 others like this

#16 LRSibb

LRSibb

    Lift Off

  • -----
  • Posts: 19
  • Joined: 01 Feb 2019

Posted 05 March 2020 - 07:25 PM

MH Stack Ha Stretch.jpg

 

Here is a stack of 9x600 second Halpha subs of NGC 2174 taken near the moon last night - No Processing other than some stretching. Excuse blemishes - I have cleaned the filters now! 


Edited by LRSibb, 05 March 2020 - 08:01 PM.

  • zjc26138, JKAstro, psandelle and 4 others like this

#17 MirkoV69

MirkoV69

    Lift Off

  • -----
  • Posts: 17
  • Joined: 27 Jan 2020

Posted 06 March 2020 - 01:26 AM

Looks like Sharpstar has now a dedicated reducer

 

I have tried to contect them in order to understand when it will be available (via FB) but so far no reply

 

Mirko

 

 

Attached Thumbnails

  • 81977536_148616959896241_6419762401301757952_o.jpg
  • 83375534_155485415876062_5494075968374964224_o.jpg


#18 MirkoV69

MirkoV69

    Lift Off

  • -----
  • Posts: 17
  • Joined: 27 Jan 2020

Posted 06 March 2020 - 04:12 AM

I just saw that now TS seems to have the reducer listed on their web site

 

 

from the picture looks the same thing , but I see no reference as being the dedicated 140APO reducer

 

Maybe they will update the description once they receive it (exp delivery 20.03)

Really curious about this

 

Mirko

Attached Thumbnails

  • snip.JPG

  • zjc26138 likes this

#19 Der_Pit

Der_Pit

    Apollo

  • *****
  • Posts: 1,286
  • Joined: 07 Jul 2018
  • Loc: La Palma

Posted 06 March 2020 - 05:10 AM

I just saw that now TS seems to have the reducer listed on their web site

 

from the picture looks the same thing , but I see no reference as being the dedicated 140APO reducer

 

No, I don't think that's the one.  The one from Sharpstar is 3", and has (AFAIR) an M88 connector on the telescope side.  M68 usually is for 2.5" accessories.

 

Edit: Hmm, maybe a typo on the TS website?  They indeed look very similar, also for the other specs like back focus and exit thread.


Edited by Der_Pit, 06 March 2020 - 05:25 AM.


#20 syxbach

syxbach

    Vostok 1

  • *****
  • Posts: 173
  • Joined: 16 Sep 2016
  • Loc: West Texas

Posted 06 March 2020 - 01:02 PM

What equipment do you have for this image? Would you mind sharing one of the fits file? Thank you!

 

attachicon.gifMH Stack Ha Stretch.jpg

 

Here is a stack of 9x600 second Halpha subs of NGC 2174 taken near the moon last night - No Processing other than some stretching. Excuse blemishes - I have cleaned the filters now! 



#21 matthisk

matthisk

    Sputnik

  • -----
  • Posts: 47
  • Joined: 09 Nov 2006
  • Loc: Nordrhein-Westfahlen

Posted 06 March 2020 - 01:42 PM

M48 on the camera side but suitable full-frame? If it would be, why havent they provided e.g m68?



#22 LRSibb

LRSibb

    Lift Off

  • -----
  • Posts: 19
  • Joined: 01 Feb 2019

Posted 07 March 2020 - 12:19 PM

tsapo140-auszug-gewinde-1000.jpg

 

 Here is a description of the connections available - also see my pic of back end above



#23 Der_Pit

Der_Pit

    Apollo

  • *****
  • Posts: 1,286
  • Joined: 07 Jul 2018
  • Loc: La Palma

Posted 07 March 2020 - 01:07 PM

I assume he was talking about the reducer.  Also the original Sharpstar 3" reducer ends in an (rotatable) M48 thread.

I do though think you can remove the last 50mm, and then are left with 80mm (outer) diameter - no idea what thread that is.  I guess you will tell us, once you have it laugh.gif

 

157871751815.jpg



#24 F.Meiresonne

F.Meiresonne

    Fly Me to the Moon

  • *****
  • Posts: 5,453
  • Joined: 22 Dec 2003
  • Loc: Eeklo,Belgium

Posted 08 March 2020 - 12:23 PM

Seems like a very nice scope!

 

I have now 2 sharpstars, 61 and 76 mm. Due to bad weather not  a chance to test fully on ap , but i can tell they are very nicely build. Flocked inside , pristine optics,...Took some moonshots, they seem very good...without any color...

just hoping for better weather...after storm and storm...and rain..


  • GlenM likes this

#25 Jacques

Jacques

    Viking 1

  • -----
  • Posts: 541
  • Joined: 11 Aug 2002
  • Loc: Belgium

Posted 08 March 2020 - 12:31 PM

I feel your pain Freddy.




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics