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

Payload limit of Mizar AR-1

  • Please log in to reply
14 replies to this topic

#1 pj_thomas

pj_thomas

    Lift Off

  • -----
  • topic starter
  • Posts: 5
  • Joined: 03 May 2021

Posted 03 May 2021 - 11:59 AM

I have a Meade 320 with what I believe is an AR-1 mount, from the late 80's, maybe 90's.  I'm looking to upgrade to something more the the 80mm and thinking a small SCT or Mak, but wonder if anyone knows the payload limit of the Mizar AR-1 mount?  Thanks in advance/



#2 apfever

apfever

    Fly Me to the Moon

  • *****
  • Posts: 6,153
  • Joined: 13 May 2008
  • Loc: Colorado

Posted 03 May 2021 - 01:36 PM

I have a complete Meade 320 with original box and some inserts. Had at least one other, maybe a third at one time but not sure. I'd like to know if the standard Meade rebrand is an official AR-1 mount. That would help in future searches. 


  • pj_thomas likes this

#3 pj_thomas

pj_thomas

    Lift Off

  • -----
  • topic starter
  • Posts: 5
  • Joined: 03 May 2021

Posted 03 May 2021 - 03:17 PM

I have a complete Meade 320 with original box and some inserts. Had at least one other, maybe a third at one time but not sure. I'd like to know if the standard Meade rebrand is an official AR-1 mount. That would help in future searches. 

I can't say for all 320's but mine is.  Problem is I can't find any information about the mount, search does not turn up anything useful.  I'm pretty sure a 6 inch catadioptric will work (or at least be usable),  But really want to know for sure.



#4 stevep

stevep

    Ranger 4

  • *****
  • Posts: 347
  • Joined: 28 Jul 2008
  • Loc: UK, Weather sucks

Posted 03 May 2021 - 06:54 PM

I think you will be fine with a 6'' cat,

 

I have a couple of these mounts, one of the scopes supplied as new with the mount was their 6'' Altair15,

this was a cat from the mid 80's and I would guess it weighted more than a modern 6''

 

Steve


  • Bomber Bob and pj_thomas like this

#5 walter a

walter a

    Viking 1

  • *****
  • Posts: 646
  • Joined: 04 Aug 2014
  • Loc: Prawda Manitoba Canada

Posted 03 May 2021 - 07:50 PM

I have a etx 125 on mine and here is a catalog file pic with some gear on another one.

Attached Thumbnails

  • DSCN1538 (640x480).jpg
  • 673_600x934.jpg

Edited by walter a, 03 May 2021 - 07:57 PM.

  • Bomber Bob, Kasmos and pj_thomas like this

#6 walter a

walter a

    Viking 1

  • *****
  • Posts: 646
  • Joined: 04 Aug 2014
  • Loc: Prawda Manitoba Canada

Posted 03 May 2021 - 07:55 PM

Here is a couple I found online.

Attached Thumbnails

  • unnamed.jpg
  • 18980-2.jpgmizar mount.jpg

  • astro140, Terra Nova, Bomber Bob and 1 other like this

#7 Bomber Bob

Bomber Bob

    Hubble

  • *****
  • Posts: 19,143
  • Joined: 09 Jul 2013
  • Loc: The Swamp, USA

Posted 04 May 2021 - 09:47 PM

IME, the Mizar EQs can carry OTAs as well as a Vixen SP — it’s the tripods that can be limiting factors for long scopes.  A modern 6” CAT shouldn’t be a problem.


  • walter a and pj_thomas like this

#8 pj_thomas

pj_thomas

    Lift Off

  • -----
  • topic starter
  • Posts: 5
  • Joined: 03 May 2021

Posted 05 May 2021 - 08:26 AM

Thanks for all the replies.  I have a Meade 320 and just want more aperture that's portable.  Reusing the tripod allows more to be spent on OTA.



#9 apfever

apfever

    Fly Me to the Moon

  • *****
  • Posts: 6,153
  • Joined: 13 May 2008
  • Loc: Colorado

Posted 05 May 2021 - 12:39 PM

Reuse the tripod and spend more on the OTA.  

My 320 balances with the stock weight close to the mount side of the shaft. It was made to accommodate a lot of accessories or a heavier scope. 

 

The tripod legs may be the weak point but are better than the Japan sliders most think of. Both of my Mizars have the solid double bolt extensions so the sliders are hard anchored at each end of the lap. Most sliders are held by a single bottom bracket with the top of the slider left loose to shift between the rails. 


  • pj_thomas likes this

#10 pj_thomas

pj_thomas

    Lift Off

  • -----
  • topic starter
  • Posts: 5
  • Joined: 03 May 2021

Posted 05 May 2021 - 12:45 PM

Reuse the tripod and spend more on the OTA.  

My 320 balances with the stock weight close to the mount side of the shaft. It was made to accommodate a lot of accessories or a heavier scope. 

 

The tripod legs may be the weak point but are better than the Japan sliders most think of. Both of my Mizars have the solid double bolt extensions so the sliders are hard anchored at each end of the lap. Most sliders are held by a single bottom bracket with the top of the slider left loose to shift between the rails. 

Same, two bolts with two big wing nuts on each leg.



#11 apfever

apfever

    Fly Me to the Moon

  • *****
  • Posts: 6,153
  • Joined: 13 May 2008
  • Loc: Colorado

Posted 05 May 2021 - 01:31 PM

Same, two bolts with two big wing nuts on each leg.

Oh can it. What do you know?  I'm tellin ya...some posters with no pictures. What do they know? Obviously they don't know how much people here need/want pictures. Most mentalities here look at pictures and turn the pages. I do, then forget the picture.  

 

The weight kind of lined up with the background so it has a red arrow to it. The red circle shows the double bolt leg extensions on both Mizar tripods. 

 

One standard configuration picture of the Meade 320.

 

One picture of standard legs. Arrow on the Right shows the top gap left to wobble on a single bottom bracket type mount (Towa 339). Arrow on Left shows a screwdriver wedge that helps solve that wobble gap issue (10TE). That screwdriver has been in there for maybe a year now, or so.  

Attached Thumbnails

  • P1010001.JPG
  • P1010002.JPG
  • P1010003.JPG

  • Bomber Bob, walter a, jcruse64 and 1 other like this

#12 Kasmos

Kasmos

    Soyuz

  • *****
  • Posts: 3,652
  • Joined: 19 Aug 2015
  • Loc: So Cal

Posted 05 May 2021 - 01:45 PM

Mizar sold most of their 68mm and some 80mm refractors on the SP mount but the more deluxe models of each were on the AR. They also show some smaller 100mm reflectors on the SP. But based on how they were offered I'd say they thought you should move up fairly quickly to the AR as the scope payload increased.  

 

Examples are in this 1981 Catalog:

 

http://yumarin7.saku...zar1981No32.pdf


Edited by Kasmos, 05 May 2021 - 01:46 PM.

  • Bomber Bob and walter a like this

#13 Bomber Bob

Bomber Bob

    Hubble

  • *****
  • Posts: 19,143
  • Joined: 09 Jul 2013
  • Loc: The Swamp, USA

Posted 05 May 2021 - 02:49 PM

Mizar sold most of their 68mm and some 80mm refractors on the SP mount but the more deluxe models of each were on the AR. They also show some smaller 100mm reflectors on the SP. But based on how they were offered I'd say they thought you should move up fairly quickly to the AR as the scope payload increased.  

 

Examples are in this 1981 Catalog:

 

http://yumarin7.saku...zar1981No32.pdf

Yeah, the AR-1 on the ShortPod carried my Criterion RV-6 OTA (with larger finders & heavier than original focuser) with no sweat.


Edited by Bomber Bob, 05 May 2021 - 02:50 PM.


#14 pj_thomas

pj_thomas

    Lift Off

  • -----
  • topic starter
  • Posts: 5
  • Joined: 03 May 2021

Posted 05 May 2021 - 07:41 PM

Oh can it. What do you know?  I'm tellin ya...some posters with no pictures. What do they know? Obviously they don't know how much people here need/want pictures. Most mentalities here look at pictures and turn the pages. I do, then forget the picture.  

This is my 320, looks like yours.

 

https://photos.app.g...Db6jBmQi9MDfND8


  • walter a likes this

#15 walter a

walter a

    Viking 1

  • *****
  • Posts: 646
  • Joined: 04 Aug 2014
  • Loc: Prawda Manitoba Canada

Posted Today, 05:41 AM

Couple more pics for the AR-1

Attached Thumbnails

  • 666_340x297 (2).jpg
  • 1158_2000x2831.jpg

  • Bomber Bob likes 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