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

Swarovski ATX 95 optical test

  • Please log in to reply
8 replies to this topic

#1 Tamiji Homma

Tamiji Homma

    Skylab

  • *****
  • topic starter
  • Posts: 4,353
  • Joined: 24 Feb 2007
  • Loc: California, USA

Posted 15 September 2020 - 05:46 PM

I received optical bench test report of Swarovski ATX 95 spotting scope objective module.

 

Here is some pictures.

 

Setup:

 

original.jpg

 

Summary:

original.jpg

 

 

Star test:

 

original.jpg

 

Ronchi and Foucault:

 

original.jpg

 

A few comments from the tester. Probably some people know who the tester is smile.gif

 

 

The whole unit "asis" is a high quality optical device. Removing a prism unit introduces the CA, but for your ~40X deep sky it should work fine.

 

 

The objective alone has chromatic aberration. It looks like it was designed as a complete unit including prisms.

Adding 40mm of glass reduces the CA.

 

Tammy

 


  • zjc26138, moshen, Erik Bakker and 7 others like this

#2 Erik Bakker

Erik Bakker

    Cosmos

  • *****
  • Moderators
  • Posts: 8,879
  • Joined: 10 Aug 2006
  • Loc: Netherlands, Europe

Posted 15 September 2020 - 07:19 PM

Thank you for sharing that info Tammy. From observing with them, these impressed me as very nice quality spotters, designed as a system. But with optical a notch below the finest spotters I've used.



#3 gnowellsct

gnowellsct

    Hubble

  • *****
  • Posts: 17,932
  • Joined: 24 Jun 2009

Posted 15 September 2020 - 08:40 PM

Would the Strehl be typical of a high end birding scope?  I guess the objective is bigger than a lot of what's out there.  That might change expectations?



#4 Tamiji Homma

Tamiji Homma

    Skylab

  • *****
  • topic starter
  • Posts: 4,353
  • Joined: 24 Feb 2007
  • Loc: California, USA

Posted 15 September 2020 - 09:11 PM

A few more shots from test report.

 

It seems that objective module lens configuration consists of air spaced triplet and two inner focus lenses.

 

original.jpg

 

large.jpg

 

large.jpg

 

Wavefront error:

 

large.jpg

 

Interferogram::

 

large.jpg

 

Tammy


Edited by Tamiji Homma, 15 September 2020 - 09:46 PM.

  • eros312 and j.gardavsky like this

#5 Tamiji Homma

Tamiji Homma

    Skylab

  • *****
  • topic starter
  • Posts: 4,353
  • Joined: 24 Feb 2007
  • Loc: California, USA

Posted 15 September 2020 - 09:19 PM

Thank you for sharing that info Tammy. From observing with them, these impressed me as very nice quality spotters, designed as a system. But with optical a notch below the finest spotters I've used.

 

You're welcome, Erik.  I sometimes climb up a hundred feet hill to get clear east skies.
I can't imagine that I take regular refractor with me for the session. They are good for intended application and provided me good viewing experience :)

 

Would the Strehl be typical of a high end birding scope?  I guess the objective is bigger than a lot of what's out there.  That might change expectations?

I have no idea.  This is the first optical test that I've ever seen on my scope by professional :)

 

Tammy


  • Erik Bakker and Tyson M like this

#6 AZStarGuy

AZStarGuy

    Apollo

  • *****
  • Posts: 1,358
  • Joined: 05 May 2008
  • Loc: Scottsdale AZ

Posted 16 September 2020 - 12:54 PM

Thanks for posting this!  All of the Swaro scopes I've looked through have been quite good.  I wonder how the Kowa TSN-883 would perform?  I love it as a spotting scope and it's quite good on the night sky for quick looks.  



#7 Astroview

Astroview

    Lift Off

  • -----
  • Posts: 4
  • Joined: 16 Sep 2020

Posted 16 September 2020 - 01:54 PM

Thank you for sharing that info Tammy. From observing with them, these impressed me as very nice quality spotters, designed as a system. But with optical a notch below the finest spotters I've used.

which were these finest spotters, Eric?



#8 Tamiji Homma

Tamiji Homma

    Skylab

  • *****
  • topic starter
  • Posts: 4,353
  • Joined: 24 Feb 2007
  • Loc: California, USA

Posted 16 September 2020 - 05:04 PM

Thanks for posting this!  All of the Swaro scopes I've looked through have been quite good.  I wonder how the Kowa TSN-883 would perform?  I love it as a spotting scope and it's quite good on the night sky for quick looks.  

 

Hi Ron,

 

You're welcome.   We should thank anonymous tester to take time to perform the test :)

 

From my experience, TSN-883 performs better than ATX 95 in CA and TSN-883 shows cleaner view at high power.

 

Tammy


  • j.gardavsky likes this

#9 Erik Bakker

Erik Bakker

    Cosmos

  • *****
  • Moderators
  • Posts: 8,879
  • Joined: 10 Aug 2006
  • Loc: Netherlands, Europe

Posted 16 September 2020 - 05:49 PM

which were these finest spotters, Eric?


The NLA Nikon ED78 and ED82 had the finest optical figure, contrast and color saturation of any spotter I’ve been able to observe with. The ED82 was a notch above all others. Swarovski makes them in similar quality but none were quite as good optically. But far better than any Zeiss or Leica I’ve had out under the stars. Mind you, sample variation varies amongst brands here too. In all fairness, these were models over the last decades, but not the latest versions. The Swarovski ‘s were though. Up to around 50x most were quite nice, but upwards of 60x they fell behind the Nikon ED’s and Swarovski’s. As a system, the Swarovski ‘s are hard to beat and like the other spotters also work well under adverse weather conditions. And Thérèse will almost certainly by very nice samples of Leica and Zeiss spotters around. Just evaluate the specifc sample of your interest to make sure you get a product that satisfies your needs and expectations.
  • edif300 and Astroview like 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