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

Sharpstar 121SDQ Vs Sharpstar 140PH hard time deciding

  • Please log in to reply
6 replies to this topic

#1 MirkoV69

MirkoV69

    Lift Off

  • -----
  • topic starter
  • Posts: 23
  • Joined: 27 Jan 2020

Posted 15 February 2020 - 08:03 AM

Good morning all

 

I have decided to purchase my first "proper" setup for deep sky.

So far I used a Nikon 300 f2.8 photo lens as OTA but now I feel ready to move one step up

(nothing wrong with it but a little short focal lenght and I feel the need for proper focuser) 

 

I am am havig a hard time deciding between Sharpstar 140PH  F6.5 triplet and Sharpstar 121 SDQ Quintuplet F5.6

 

The 121 incorporates a 2 elements flattner , the 140 needs to be flattened/reduced 

budget wise the 121 is more expensive but as you add the reducer/flattner to the 140 the end up very close

 

I tend to lean onto the 140 as it offers the possibility to use different flattners: in case I am not happy with the sharpstar one I could possibly replace with 3rd party ones 

 

At present I am using a Nikon D5200 (full spectrum modified) and plan to move to a cooled camera next year (possibly ASI 2600MC-PRO)

 

 

Would really appreciate opinions from people with more experience 

 

thanks

best regards

Mirko

 

 



#2 junomike

junomike

    Hubble

  • *****
  • Moderators
  • Posts: 19,168
  • Joined: 07 Sep 2009
  • Loc: Ontario

Posted 15 February 2020 - 08:24 AM

The 121 is lighter and has a larger Focuser, but overall either should be a nice option.

I would most likely go for the 121mm as It comes already set up out of the box.

Also, the 121mm has enough back-focus to use visually If wanted.


  • MirkoV69 likes this

#3 astrodom

astrodom

    Mariner 2

  • -----
  • Posts: 231
  • Joined: 04 Jan 2008
  • Loc: NY , USA

Posted 15 February 2020 - 10:45 AM

   It may also depend on the mount you are using.  I would guess that the 140 would weigh more by the time you add the flattener and camera, etc.   I have a 140mm refractor but its a little heavy and now that I am older, I find myself using my small refractor more often.  You can't go wrong with either scope in my opinon.


  • MirkoV69 likes this

#4 tonyt

tonyt

    Vanguard

  • -----
  • Posts: 2,150
  • Joined: 01 Sep 2009
  • Loc: Australia

Posted 15 February 2020 - 07:11 PM

Since you're moving up from a 300mm lens, I'd recommend the TS115/800 triplet which works well with the TS 0.79x 3" reducer - it's a cheap but very good scope and it's not heavy. After some experience with that scope you can add a significantly longer focal length scope.  


  • MirkoV69 likes this

#5 MirkoV69

MirkoV69

    Lift Off

  • -----
  • topic starter
  • Posts: 23
  • Joined: 27 Jan 2020

Posted 16 February 2020 - 04:57 AM

Since you're moving up from a 300mm lens, I'd recommend the TS115/800 triplet which works well with the TS 0.79x 3" reducer - it's a cheap but very good scope and it's not heavy. After some experience with that scope you can add a significantly longer focal length scope.  

This is something I have not considered, but I will look into it

 

Thanks

 

Mirko



#6 MirkoV69

MirkoV69

    Lift Off

  • -----
  • topic starter
  • Posts: 23
  • Joined: 27 Jan 2020

Posted 16 February 2020 - 04:59 AM

   It may also depend on the mount you are using.  I would guess that the 140 would weigh more by the time you add the flattener and camera, etc.   I have a 140mm refractor but its a little heavy and now that I am older, I find myself using my small refractor more often.  You can't go wrong with either scope in my opinon.

At the moment I have a AZ EQ6 , it is rated at 20 KG, the complete setup would be around 13 KG .... I think should be on the safe side

 

thanks

Mirko


Edited by MirkoV69, 16 February 2020 - 05:09 AM.


#7 Michaeljhogan

Michaeljhogan

    Messenger

  • -----
  • Posts: 475
  • Joined: 25 Aug 2014

Posted 16 February 2020 - 12:51 PM

Good morning all

 

I have decided to purchase my first "proper" setup for deep sky.

So far I used a Nikon 300 f2.8 photo lens as OTA but now I feel ready to move one step up

(nothing wrong with it but a little short focal lenght and I feel the need for proper focuser) 

 

I am am havig a hard time deciding between Sharpstar 140PH  F6.5 triplet and Sharpstar 121 SDQ Quintuplet F5.6

 

The 121 incorporates a 2 elements flattner , the 140 needs to be flattened/reduced 

budget wise the 121 is more expensive but as you add the reducer/flattner to the 140 the end up very close

 

I tend to lean onto the 140 as it offers the possibility to use different flattners: in case I am not happy with the sharpstar one I could possibly replace with 3rd party ones 

 

At present I am using a Nikon D5200 (full spectrum modified) and plan to move to a cooled camera next year (possibly ASI 2600MC-PRO)

 

 

Would really appreciate opinions from people with more experience 

 

thanks

best regards

Mirko

As much as these two Apo scopes from Sharpstar are the best Chinese Apos they are beautiful i would love the Sharpstar 140PH its way better than any

of the other TS-Optics PHOTOLINE 152 mm f/8 Triplet or the APM Doublet SD Apo 140 f/7 FPL53 or APM Doublet ED Apo 152 mm f/7.9.

 

I could never give 4.300,00 Euro for the Sharpstar 121 SDQ when the Takahashi TSA-120FT is only 400 more i would go for the 5.5 inch Sharpstar 140PH.


Edited by Michaeljhogan, 16 February 2020 - 12:52 PM.

  • MirkoV69 likes this


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