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

Zeiss AS80/840

  • Please log in to reply
49 replies to this topic

#26 Disciplus55

Disciplus55

    Messenger

  • *****
  • topic starter
  • Posts: 458
  • Joined: 20 Dec 2014
  • Loc: East of France

Posted 22 May 2018 - 11:23 AM

For example I would like to know what M44 extensions to use with which barlow / eyepieces combination, or straight through viewing or diagonal, etc... all existing accessories, photos, etc... 



#27 Orogeneza

Orogeneza

    Explorer 1

  • *****
  • Posts: 89
  • Joined: 25 Oct 2013
  • Loc: Europe

Posted 23 May 2018 - 11:02 AM

I just remembered that late Zeiss telescopes came with information booklet and I have one.

The information inside is mostly generic for whole telescope line, but It does look that AS80/840 is a bit special.

 

Attached Thumbnails

  • IMG_20180523_174637.jpg

  • Andy Howie and terraclarke like this

#28 Orogeneza

Orogeneza

    Explorer 1

  • *****
  • Posts: 89
  • Joined: 25 Oct 2013
  • Loc: Europe

Posted 23 May 2018 - 11:04 AM

couple pages

Attached Thumbnails

  • IMG_20180523_174952.jpg
  • IMG_20180523_174712.jpg

  • deSitter, Andy Howie, Fomalhaut and 5 others like this

#29 Jim Curry

Jim Curry

    Mercury-Atlas

  • *****
  • Posts: 2618
  • Joined: 29 Oct 2007
  • Loc: STL

Posted 23 May 2018 - 05:22 PM

You're about to make a lot of new friends after displaying that book...


  • Andy Howie likes this

#30 Disciplus55

Disciplus55

    Messenger

  • *****
  • topic starter
  • Posts: 458
  • Joined: 20 Dec 2014
  • Loc: East of France

Posted 24 May 2018 - 02:19 AM

Excellent !! Thanks !



#31 Disciplus55

Disciplus55

    Messenger

  • *****
  • topic starter
  • Posts: 458
  • Joined: 20 Dec 2014
  • Loc: East of France

Posted 16 June 2018 - 02:23 AM

If someone is looking for a solar filter SFO 80, send me a message



#32 Disciplus55

Disciplus55

    Messenger

  • *****
  • topic starter
  • Posts: 458
  • Joined: 20 Dec 2014
  • Loc: East of France

Posted 28 October 2018 - 03:54 AM

Hello there,

Protect me from what I want... or not...

I have that gorgeous Zeiss AS80/840, and have sold some gears lately to maybe potentially fund a new AP Stowaway... but because of its price in France, I have not raised enough funds yet... now, here is the question : would it make sense to replace my Zeiss by a Stowaway, meaning selling the Zeiss for the AP ?

Aperture is larger on the AP

OTA is overall more compact on the AP

Color correction will be better on the AP

Cooling time might be faster on the Zeiss

Doing visual only...

What other considerations shall I have in mind ?

Thanks for your inputs.



#33 Jim Curry

Jim Curry

    Mercury-Atlas

  • *****
  • Posts: 2618
  • Joined: 29 Oct 2007
  • Loc: STL

Posted 28 October 2018 - 06:00 AM

You currently own a very high quality achromat, pleasing to look at and through.

 

Aperture is larger on the AP - This is the only reason I could see that would make the larger scope meaningful.  The AP will give you a larger exit pupil, brighter image at equivalent high powers on lunar/planetary viewing.  Is this the bulk of your use?

OTA is overall more compact on the AP - So what.  How is this an issue with your observing style?  Still a small scope.

Color correction will be better on the AP - Only at the highest magnifications.  Are you bothered now?

Cooling time might be faster on the Zeiss - Might be.  By what, 3.1 minutes?  Not a real issue.

 

Possible Solutions: 

Keep saving your money, keep the Zeiss, buy the AP.  Unless you know your name is high on the list you probably have many months to save.

Or,  sell the Tak, buy the AP. (that's what I'd do). 

 

Tough decision.

Jim


  • Disciplus55 likes this

#34 Fomalhaut

Fomalhaut

    Surveyor 1

  • -----
  • Posts: 1731
  • Joined: 16 Aug 2008
  • Loc: Switzerland

Posted 28 October 2018 - 08:00 AM

 

 

Or,  sell the Tak, buy the AP. (that's what I'd do). 

 

 

 

That's just what I would not do: Your Tak FC100 DL has got only 6 cm longer focal length than AS80/840 and will exceed both (AS as well as Stowaway which has 8mm less aperture).

Therefore IMHO, just keep the Tak, be happy and forget.


Edited by Fomalhaut, 28 October 2018 - 02:52 PM.

  • Disciplus55 likes this

#35 Disciplus55

Disciplus55

    Messenger

  • *****
  • topic starter
  • Posts: 458
  • Joined: 20 Dec 2014
  • Loc: East of France

Posted 31 October 2018 - 09:39 AM

Thanks a lot for both your inputs, I keep the Zeiss and Tak then :-)


  • Fomalhaut and Marcus Roman like this

#36 Jim Curry

Jim Curry

    Mercury-Atlas

  • *****
  • Posts: 2618
  • Joined: 29 Oct 2007
  • Loc: STL

Posted 31 October 2018 - 06:13 PM

đź‘Ť

#37 Piggyback

Piggyback

    Viking 1

  • *****
  • Posts: 915
  • Joined: 14 Sep 2013
  • Loc: Germany

Posted 02 November 2018 - 07:12 AM

How many AS 80/840 produced? Anyone have a clue?



#38 Disciplus55

Disciplus55

    Messenger

  • *****
  • topic starter
  • Posts: 458
  • Joined: 20 Dec 2014
  • Loc: East of France

Posted 02 November 2018 - 10:11 AM

How many AS 80/840 produced? Anyone have a clue?

No idea... we see quite some AS 80/1200 objectives, but full OTA’s like mine, I only one other in Europe...


  • Piggyback likes this

#39 Jim Curry

Jim Curry

    Mercury-Atlas

  • *****
  • Posts: 2618
  • Joined: 29 Oct 2007
  • Loc: STL

Posted 02 November 2018 - 10:06 PM

Well, at least one of the AS80/840 lens/cells made it to the US for an OTA build.

 

Z840.jpg

 

Jim


  • Astrojensen, Kevin Barker, terraclarke and 3 others like this

#40 Piggyback

Piggyback

    Viking 1

  • *****
  • Posts: 915
  • Joined: 14 Sep 2013
  • Loc: Germany

Posted 04 November 2018 - 07:17 AM

Baader at ATT Essen 2009 and 2010 had a Zeiss AS 80/840 on display. Can´t remember if it was for sale. Stunning collection.

 

 

Zeiss auf Baader Stand ATT Essen 2010_2red.jpg


Edited by Piggyback, 04 November 2018 - 08:21 AM.

  • Jim Curry, Fomalhaut, Astrojensen and 6 others like this

#41 Piggyback

Piggyback

    Viking 1

  • *****
  • Posts: 915
  • Joined: 14 Sep 2013
  • Loc: Germany

Posted 04 November 2018 - 07:57 AM

A Zeiss APQ 100/640mm OTA serial no. 97814 with Zeiss turret on Zeiss PA 1b mount and tripod could be had for 10.950.- Euro. A MAK 180 on PA II equatorial and tripod was available for 12.250.- Euro at the Baader stand. The carbon bodied 150/1200mm APQ on PA II equatorial and tripod was 18.250.- Euro. Most spectacular Zeiss display ever!


Edited by Piggyback, 04 November 2018 - 08:08 AM.


#42 Jim Curry

Jim Curry

    Mercury-Atlas

  • *****
  • Posts: 2618
  • Joined: 29 Oct 2007
  • Loc: STL

Posted 04 November 2018 - 08:16 AM

Baader at ATT Essen 2009 had a Zeiss AS 80/840 on display. Can´t remember if this was for sale. Stunning collection.

 

 

attachicon.gif Zeiss auf Baader Stand ATT Essen 2010_2red.jpg

bigshock.gif


  • Piggyback likes this

#43 Disciplus55

Disciplus55

    Messenger

  • *****
  • topic starter
  • Posts: 458
  • Joined: 20 Dec 2014
  • Loc: East of France

Posted 06 March 2019 - 10:38 AM

DA82D576-DCFB-4277-BE1A-9556F107DC00.jpeg

Hello

 

Just for fun, I made a side by side daylight comparison between the Zeiss and the Clavé 80/1208 I just got back. Comparing them both on daylight with the same diagonal (Baader BBHS mirror) and almost same magnification : 140x and 150x (8mm on the Clavé and 6mm on the Zeiss), on the roofs and church of the village, at least 500m away. Hard to make any conclusion on transmission, lack of scatter or sharpness (moisture outside), but what was surprising is that the Zeiss showed slightly less color (blue fringe) overall, despite the much shorter FL and ok, with a small magnification difference...


  • Jim Curry, Astrojensen, terraclarke and 1 other like this

#44 Piggyback

Piggyback

    Viking 1

  • *****
  • Posts: 915
  • Joined: 14 Sep 2013
  • Loc: Germany

Posted 08 March 2019 - 02:59 AM

I would not have expected better color correction. AS Lenses are notorious for blue color fringing around bright objects. But then they might have changed coatings or glass material. Very interesting.


  • Fomalhaut likes this

#45 Kevin Barker

Kevin Barker

    Viking 1

  • -----
  • Posts: 783
  • Joined: 22 Apr 2009
  • Loc: Auckland, NZ

Posted 09 March 2019 - 09:18 PM

AS lenses were cDe corrected. The chromatic aberration in a cDe corrected is bluer as opposed to more of a magenta hue with CEF achromats. I have looked through a smaller AS63/840 and a larger AS 150/2250 and noticed the blue CA as well.

Depending on the glass type AS lenses have a secondary spectrum of about 1/2400 to 1/2800th the focal length. A typical Fraunhofer achromat has around 1/2000.

 

I am not surprised you have reported excellent colour correction. I also have an AS80 albeit in a homemade ota.

Any residual CA is not really a problem at all. Mine is really good for planetary.

I'd suspect an 80/1200 would not really be a hell of a let better. The AS80/840 is a nice size.

Images remind me of a scaled down APQ. 

DSCF0012.jpg

 

 

Hello

 

Just for fun, I made a side by side daylight comparison between the Zeiss and the Clavé 80/1208 I just got back. Comparing them both on daylight with the same diagonal (Baader BBHS mirror) and almost same magnification : 140x and 150x (8mm on the Clavé and 6mm on the Zeiss), on the roofs and church of the village, at least 500m away. Hard to make any conclusion on transmission, lack of scatter or sharpness (moisture outside), but what was surprising is that the Zeiss showed slightly less color (blue fringe) overall, despite the much shorter FL and ok, with a small magnification difference...

 


  • memento, terraclarke, Bomber Bob and 2 others like this

#46 Disciplus55

Disciplus55

    Messenger

  • *****
  • topic starter
  • Posts: 458
  • Joined: 20 Dec 2014
  • Loc: East of France

Posted 30 July 2019 - 01:26 AM

A little « up », anyone got time to check if they have some leaflet, documents or whatsoever on AS80/840 ? Also, am I the only one here to have one on an original Zeiss tube ? I really wonder how many pieces still exist of this frac... 



#47 Astrojensen

Astrojensen

    Voyager 1

  • *****
  • Posts: 12035
  • Joined: 05 Oct 2008
  • Loc: Bornholm, Denmark

Posted 30 July 2019 - 01:55 AM

 

anyone got time to check if they have some leaflet, documents or whatsoever on AS80/840 ?

I have the original, two-page brochure. Did I not send a scan of it to you? I can't remember.

 

 

Also, am I the only one here to have one on an original Zeiss tube ? I really wonder how many pieces still exist of this frac...

You might be the only one in the CN Classic forum to have one, but a quick Google search bring up quite a few hits, so they're out there. How many? No idea. It isn't the rarest Zeiss scope, for sure, but it has just the right size for a lot of people, so I suspect that the owners do not want to part with them very often.

 

 

Clear skies!
Thomas, Denmark



#48 Disciplus55

Disciplus55

    Messenger

  • *****
  • topic starter
  • Posts: 458
  • Joined: 20 Dec 2014
  • Loc: East of France

Posted 30 July 2019 - 09:35 AM

Yes you did Thomas, I have that 2 pages brochure now, and the test from a magazin that Janez sent to me. Just wondering if there are more public info out there :-)

indeed... some Google hits. Thx !



#49 Piggyback

Piggyback

    Viking 1

  • *****
  • Posts: 915
  • Joined: 14 Sep 2013
  • Loc: Germany

Posted 30 July 2019 - 01:03 PM

Drool over this, everyone...

 

 

Zeiss AS 80mm auf 840mm Prospekt_1red.jpg

 

 

 

 


  • Jim Curry, Disciplus55 and Ben Bajorek like this

#50 Piggyback

Piggyback

    Viking 1

  • *****
  • Posts: 915
  • Joined: 14 Sep 2013
  • Loc: Germany

Posted 30 July 2019 - 01:05 PM

Back page of Zeiss AS 80 flyer...

 

 

Zeiss AS 80mm auf 840mm Prospekt_2red.JPG


  • Disciplus55 and Ben Bajorek 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