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

Mak-Newt pics

  • Please log in to reply
84 replies to this topic

#76 SkyRanger

SkyRanger

    Messenger

  • *****
  • Posts: 430
  • Joined: 21 Oct 2010
  • Loc: Prescott Valley, AZ

Posted 26 May 2019 - 08:27 AM

Rob, I think they are a wonderful addition to the G11 set up. Without them the EP would get in some very awkward positions! Downside: they add considerable weight to the system.

Gordon G

#77 CHASLX200

CHASLX200

    Hubble

  • *****
  • Posts: 18483
  • Joined: 29 Sep 2007
  • Loc: Tampa area Florida

Posted 26 May 2019 - 08:47 AM

Never owned one.



#78 SkyRanger

SkyRanger

    Messenger

  • *****
  • Posts: 430
  • Joined: 21 Oct 2010
  • Loc: Prescott Valley, AZ

Posted 26 May 2019 - 09:50 AM

Chas, based on my experience with the HD 145 and reports of experienced users comparing the 145 to a high end 140mm apo, I'd guesstimate the visual performance of the HD 145 is similar to that of a very good 140 mm apo.  

 

Please note my deliberate weasel-word; I haven't done the comparison myself and am not knocking anyone's high-end apo!  grin.gif

 

GG



#79 CHASLX200

CHASLX200

    Hubble

  • *****
  • Posts: 18483
  • Joined: 29 Sep 2007
  • Loc: Tampa area Florida

Posted 26 May 2019 - 02:35 PM

Chas, based on my experience with the HD 145 and reports of experienced users comparing the 145 to a high end 140mm apo, I'd guesstimate the visual performance of the HD 145 is similar to that of a very good 140 mm apo.  

 

Please note my deliberate weasel-word; I haven't done the comparison myself and am not knocking anyone's high-end apo!  grin.gif

 

GG

I bet i would love it, but at them prices a good 8" F/8 Newt would win out everytime and cost 3 times less. I guess that is why i never jumped on one.



#80 Cotts

Cotts

    Just Wondering

  • *****
  • Moderators
  • Posts: 9776
  • Joined: 10 Oct 2005
  • Loc: Madoc, Ontario

Posted 27 May 2019 - 08:17 AM

Chas, based on my experience with the HD 145 and reports of experienced users comparing the 145 to a high end 140mm apo, I'd guesstimate the visual performance of the HD 145 is similar to that of a very good 140 mm apo.  

 

Please note my deliberate weasel-word; I haven't done the comparison myself and am not knocking anyone's high-end apo!  grin.gif

 

GG

My 145 in separate side-by side tests was entirely the equal of a TEC 140  and, later, a 1988 Astro-Physics 150mm....  Specifically, the test was an examination of the diffraction pattern at very high power.  (As a double star observer I do this sort of 'testing' all the time')  There was no difference seen, especially in the first ring brightness, thickness etc.  A 16% central obstruction has no visible effect on the diffraction pattern..  The 145 is, to all intents and purposes a perfectly APOchromatic 5.7-inch refractor but with a noticeably narrower fully-illuminated field due to the small secondary...

 

My 145 is going with me to the Cherry Springs STar Party if anyone wants to have a peek..

 

Dave


  • SkyRanger likes this

#81 luxo II

luxo II

    Apollo

  • -----
  • Posts: 1128
  • Joined: 13 Jan 2017
  • Loc: Sydney, Australia

Posted 27 May 2019 - 05:11 PM

Pics please !

#82 PeterGunn

PeterGunn

    Sputnik

  • -----
  • Posts: 35
  • Joined: 19 Apr 2018
  • Loc: Maine

Posted 29 May 2019 - 07:14 AM

AT102ED on MN76/G11
 
MN-76 on a G11 with an AT102ED for company

Edited by PeterGunn, 29 May 2019 - 04:56 PM.

  • Starman27 and Colin exraaf like this

#83 JohnH

JohnH

    Gemini

  • ****-
  • Posts: 3101
  • Joined: 04 Oct 2005
  • Loc: Squamish BC Moved!!!!!

Posted 31 May 2019 - 06:50 PM



MN-76 on a G11 with an AT102ED for company

Did all of these MN 76 Scopes come with the rotating rings? Yours looks functionally identical to mine but I can't see the front cap or the rear cell. My front has holes for cooling and the back has a large hole with a fan in it.

Edited by JohnH, 31 May 2019 - 06:50 PM.


#84 PeterGunn

PeterGunn

    Sputnik

  • -----
  • Posts: 35
  • Joined: 19 Apr 2018
  • Loc: Maine

Posted 01 June 2019 - 06:36 AM

JohnH, mine came with the rotating rings and a heavy top plate where I have mounted a couple of refractors over the years. The meniscus cell is perforated and has filter material in the holes. The rear of the mirror cell has a fan. 



#85 JohnH

JohnH

    Gemini

  • ****-
  • Posts: 3101
  • Joined: 04 Oct 2005
  • Loc: Squamish BC Moved!!!!!

Posted 01 June 2019 - 09:21 AM

I'll post pictures in my gallery


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