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new sw esprit 100 or second hand TS-Optics Imaging Star 100mm f/5.8,

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#1 iwols

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Posted 20 February 2019 - 07:19 AM

hi all the search and confusion continues,just wondered what any one thought about the above,more confused than ever thanks

 

well upgrading from ed80,heard great things about the esprit but just wondering what it is like out of the box ,but it is new.....on the other hand the  ts is second hand and is ts a home brand ,??


Edited by iwols, 20 February 2019 - 07:19 AM.


#2 einarin

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Posted 20 February 2019 - 09:27 AM

Tough choice, but TS Imaging Star scopes are good. Chinese of course all just branded.



#3 Dunkstar

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Posted 21 February 2019 - 07:40 AM

I don’t see any advantage to the TS scope. It’s more expensive and has one fewer correcting lens (when using the Esprit 100 flattener) wink.gif



#4 RogeZ

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Posted 22 February 2019 - 06:46 AM

I have the Stellarvue SVQ100 and its an amazing scope. Corrects to full frame with minimal vignetting. To get a better scope you have to get a FSQ106.

#5 tcchittyjr

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Posted 22 February 2019 - 12:19 PM

I have both the Esprit 80ED and the 120ED, and love them both. Great color, and right out of the box better than I was.

 

TomC



#6 calypsob

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Posted 22 February 2019 - 12:48 PM

Id go with the esprit, you can add a reducer/flattener. The TS optics is a Petzval, I am not sure if a reducer existis for a quadruplet or if it is even possible. Maybe an FSQ reducer can be paired up? If that were the case the Petzval would be very attractive, but for now the Espirit is more modular.



#7 Poochpa

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Posted 22 February 2019 - 05:42 PM

Id go with the esprit, you can add a reducer/flattener. The TS optics is a Petzval, I am not sure if a reducer existis for a quadruplet or if it is even possible. Maybe an FSQ reducer can be paired up? If that were the case the Petzval would be very attractive, but for now the Espirit is more modular.

Televue NPR-1073 .8x reducer, recommended by TS for its Petzval.

Mike



#8 Ken Sturrock

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Posted 22 February 2019 - 06:37 PM

Id go with the esprit, you can add a reducer/flattener. The TS optics is a Petzval,

 

I agree with your point, reducing a flattened light cone is tricky. A number of folks, who have been waiting on an SVQ reducer, might have actually been happier with a different (although less turn-key) design.

 

Technically, though, the TS quad (or SVQ) is not a Petzval. Rather it is a triplet with a single built-in field flattening element. Check out this cool document by Ackerman et al (Pages 28 & 29).


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#9 roofkid

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Posted 23 February 2019 - 06:05 AM

Personally I have chosen the Esprit 3 years ago and I would choose it again. To me the optical quality of subs is indistinguishable from FSQ106 or Televue SVQ. I know other people may have different opinions there though laugh.gif Just look around for some subs and then you can decide for yourself would be my suggestion.

Obviously the image circle is not as large as the FSQ106 though. So if you choose a medium format camera then things may be looking differently.


Edited by roofkid, 23 February 2019 - 06:06 AM.



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