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Equipment Discussions >> Mounts

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csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Alt-Az Mount for 4" f10 refractor new
      #6150121 - 10/21/13 03:59 PM

Hey all, I'm mount stupid when it comes to alt/az mounts. I have a 102XLT on a CG4 EQ mount, but would like to find a useable, but inexpensive Alt/Az mount for GrabnGo. As the CG4 is motorized, I don't want to use it in alt/az mode. The OTA weighs about 10lbs, and I have some heavier eyepieces and the RACI. I want it to use in the back yard for lunar/planetary use only. No AP, just visual. I'm looking for a mount/tripod under $200, used would be fine...any ideas?

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Bill McNeal
sage


Reged: 10/07/07

Re: Alt-Az Mount for 4" f10 refractor new [Re: csrlice12]
      #6150363 - 10/21/13 06:25 PM

Celestron has two alt-az mounts, each less than $100. The Astromaster (item 93610) and 93607, which has slow-mo controls. I haven't personally tried either, but they may be suitable for you.

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dennilfloss
sage


Reged: 01/06/13

Loc: Ottawa, Canada
Re: Alt-Az Mount for 4" f10 refractor new [Re: Bill McNeal]
      #6150562 - 10/21/13 08:43 PM

If slow-motion controls aren't important to you, I'd recommend the Skywatcher AZ4 with steel legs.

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brokenwave
sage


Reged: 05/10/11

Loc: Scottsdale, AZ
Re: Alt-Az Mount for 4" f10 refractor new [Re: dennilfloss]
      #6150572 - 10/21/13 08:52 PM

If you could spent $300 the Explorer Scientific TwilightI,
is hard to beat, Orion has a similar style mount for $329.
IMHO these are more stable than a Vixen Porta II,
I have compared the Porta II to the TwilightI and it was 5 second vs 2.5 second settling. With the ES Twilight the winner.
Since your 102 is 40" long having a good tripod is a must to handle the leverage from a longer scope.


Edited by brokenwave (10/21/13 09:01 PM)


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mayidunk
Don't Ask...
*****

Reged: 02/17/10

Loc: Betwixt & Between...
Re: Alt-Az Mount for 4" f10 refractor new [Re: brokenwave]
      #6151841 - 10/22/13 03:03 PM

I use a William Optics Easy Touch ALT-AZ mount on an Oberwerk wooden tripod. I am able to mount an ES AR-152 refractor on it, using the counter weight shaft from an EQ-2 mount to hold the counter weights needed to balance its 24 Lb. weight. However, it should handle your tube without needing a counter weight. They're no longer being made by WO, but can be found used. Here is William Optics web page for this mount, it contains useful information. Here's the link to Oberwerk's clearance page. Page down one page to see the blem wooden tripods they're currently selling.

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edwinh
super member
*****

Reged: 03/01/08

Loc: Chandler AZ
Re: Alt-Az Mount for 4" f10 refractor new [Re: mayidunk]
      #6151959 - 10/22/13 03:59 PM

Do you need slow-mo? If not and you already have a tripod, could get something like a stellarvue M2 head. Show up used occasionally for around your price point. I have my C102 on the M2 (until the planned dsv-2 shows up!).... works well for me.

Edited by edwinh (10/22/13 04:01 PM)


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*skyguy*
Carpal Tunnel
*****

Reged: 12/31/08

Loc: Western New York
Re: Alt-Az Mount for 4" f10 refractor new [Re: edwinh]
      #6153026 - 10/23/13 06:32 AM

You could always look around for a used Vixen Polaris mount and set it up in alt-az mode. It has slo-mo knobs on stalks on both axes and the quality of this mount is superb ... a real joy to use! Around $125-$175 should get you one in very good used condition.

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hottr6
Carpal Tunnel
*****

Reged: 06/28/09

Loc: 7,500', Magdalena Mtns, NM
Re: Alt-Az Mount for 4" f10 refractor new [Re: *skyguy*]
      #6153182 - 10/23/13 08:55 AM

Not for a 4" f/10. No way. No how. The Polaris may be happy with the weight of the OP's OTA, but not with that long tube. My 90mm f/11 is a mess on the Polaris at exit pupils of 5mm and smaller. Does not bode well for planetary work.

IMHO, you will need something that is equivalent to a Vixen GP, or larger. AFAIK, there are no alt-az's with this capacity, in your price range...... except Richard Berry's roll-your-own alt-az. No slo-mo, however.

Good luck. Long 'scopes are a lot harder to mount.


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csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: Alt-Az Mount for 4" f10 refractor [Re: hottr6]
      #6153307 - 10/23/13 10:05 AM

Wow, a lot of responses. I would like slo-mo controls. In fact, the only reason I was looking is that the CG4 EQ is motorized and for quick grabngo is just not the mount of choice. I could use it in alt/az config, but then theres the mess of setting it back up into EQ mode, polar scope alignment, and that I don't want my grabngo motorized, etc.... I suppose I could get a second used CG4 and convert it to alt/az...just thought there might be one out there at a reasonable price already. Seems they're no cheaper then the EQ mounts.

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