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

BRESSER 4 Inch f 4.5 AR 102XS Refractor visual observers’ REVIEW

  • Please log in to reply
30 replies to this topic

#26 DIMITRIS K.

DIMITRIS K.

    Vostok 1

  • -----
  • Posts: 100
  • Joined: 23 Aug 2017
  • Loc: Athens, Greece

Posted 19 July 2018 - 06:04 AM

Thanks Peter.

 

Right so a semi-apo it is then. I'm just catching up with threads/posts on this scope. I'm interested for sure as part corrected wide field sounds like a nice step up from Skywatcher's ST80/120.

 

Rob

Hi i had the same questions and i send an email to BRESSER. Here is their answer. Hope it helps!

 

 

"Here is the mail with the reply from BRESSER:

 

Dear Mr. ...,

thank you for your interest in a BRESSER telescope.

About your questions:

 

- What type of ED glass do you use?
What exact ED glass it is is a business secret, I ask for your understanding. But of course, at this price range it is logical that it is a very cheap ED glass.

 

- How severe chromatic aberration i must expect?
It is like a normal achromatic refractor around F/7.

 

- Concerning ED glass, can you classified it as a semi apo telescope?
No! We classify it clearly only as achromatic refractor! We use ED glass at this telescope only because at F/4.5 you cannot really use normal glass.

 

- Is it suitable for astrophotography and EAA?
This telescope is made for wide-field observing. For example the North-America nebulae is a very nice object to observe at this telescope. It is also a very nice telescope for travelling.

 

Of course, you can also use it for imaging, but you will get some color at bright stars.

But this telescope is NOT a apo-chromatic flat-field astrograph!

Best regards
Wolfgang Quere"


  • DHEB and petmic like this

#27 rogeriomagellan

rogeriomagellan

    Surveyor 1

  • *****
  • Posts: 1811
  • Joined: 13 Oct 2016

Posted 22 July 2018 - 11:03 AM

I think it is only AR127 and AR152 in Bresser line that use Petzval design.

 

I have got AR102S and it is certainly not a Petzval design. AFAIK AR102XS is basically a shortened AR102S and in order to reduce the chromatic abberation they used ED glass on one of the doublet lenses. It is definitely not a ED scope though.

You're right. Only the Bresser Messier AR127 and AR152 have a Petzval design. 


  • morden8uk likes this

#28 SteveFour86

SteveFour86

    Ranger 4

  • *****
  • Posts: 336
  • Joined: 14 Dec 2009
  • Loc: Bay City, OR

Posted 26 August 2018 - 11:01 AM

Good stuff thank you for your time and efforts in sharing this with us in the interwebs.



#29 S Gazer

S Gazer

    Sputnik

  • -----
  • Posts: 35
  • Joined: 09 Feb 2012
  • Loc: Minneapolis

Posted 08 December 2018 - 04:41 PM

Looks like a good scope for the price.  Thanks for sharing the info.



#30 Sarkikos

Sarkikos

    ISS

  • *****
  • Posts: 29016
  • Joined: 18 Dec 2007
  • Loc: Per sylvam ad astra

Posted 22 January 2019 - 09:15 AM

The first thing I did when I received my AR 102XS was install a Synta/Vixen-style finder base.  Here is the base I used:

 

https://www.adorama....ASABEgJg-fD_BwE

 

I really detest the proprietary, non-standard finder bases that some companies put on their telescopes.  The Synta/Vixen-style base is really the de facto standard now.  All the companies should accept it.

 

I chucked the supplied base, bracket and finder into a box in the closet. 

 

I put a Z-Bolt laser finder in the base.  That's the best finder for an RFT.  

 

Mike



#31 paulsky

paulsky

    Apollo

  • -----
  • Posts: 1064
  • Joined: 17 Feb 2004

Posted 22 January 2019 - 12:09 PM

This refractor could be a good instrument for framing deep sky objects with low magnification, but within its context?

For example, if we use the Bresser with a good 30mm 82º wield field?

Regards,

Paul




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