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Equipment Discussions >> Mounts

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ghataa
professor emeritus


Reged: 06/20/11

Loc: Central, NJ
Classic Atlas or New Alt/Azm Atlas? new
      #5686030 - 02/17/13 09:45 PM

Hi All,

I am looking to move to a beefier mount for AP and had basically settled on the Atlas until the new Atlas Pro mount came out. While I appreciate the upgrades on be Pro, I have no interest in alt/azm feature and curious if everything else is essentially equal between the two mounts. For example, weight capacity, ability to do long exposures while guiding etc. The $800 dollar difference is significant and let's me think about other goodies, especially if performance is practically the same for AP.

Thanks,

George


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Lane
Post Laureate


Reged: 11/19/07

Loc: Frisco, Texas
Re: Classic Atlas or New Alt/Azm Atlas? new [Re: ghataa]
      #5687119 - 02/18/13 03:17 PM

Weight capacity is highter and theoretically the belt drive will make AP better on the new mount.

Having ALT/AZ is really a benefit for those of us that do visual viewing. Keeps the eyepiece at a reasonable position and does not flip the scope upside down, which helps with mirror flop issues in an SCT.


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hcsceo
super member
*****

Reged: 10/14/09

Loc: Austin, TX
Re: Classic Atlas or New Alt/Azm Atlas? [Re: ghataa]
      #5687134 - 02/18/13 03:23 PM

George, I just went through this over the weekend and went with the Classic Atlas. I can't really speak for the Pro version as I've never even seen one, but I didn't want to deal with any issues that might hang up my imaging so went with the tried and true classic mount. I'll never use it in ALT/AZ either so I didn't see a reason to go with the added complexity and risk issues. Looks like it has encoders which could be beneficial if the resolution is good and appears to support 4 extra pounds of weight (Not sure if that really means anything). I currently run a C8 and a C9.25 could be in my future and know the atlas will handle either well. I did want to use EQMod since my imaging is completely robotic now and I've yet to see anyone using EQMod with it so not sure if it will work. Basically, I know the Classic Atlas will work for me and I had too many questions about the PRO to risk it. Plus the added savings puts more money in my pocket for other stuffs. I'm generally not a first revision kind of person and with something this expensive there is no way I'm going to risk my hobby on a bad experience. Not sure any of this helps you but that was my thought process.

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EFT
Vendor - Deep Space Products
*****

Reged: 05/07/07

Loc: Phoenix, AZ
Re: Classic Atlas or New Alt/Azm Atlas? new [Re: hcsceo]
      #5688786 - 02/19/13 12:17 PM

If you have no intention of using the Alt/Az then I would see no reason for going with the Atlas Pro. While they have added a belt drive system, there is a misconception as to what a belt drive may or may not do. There seems to be an idea that a belt drive will not have backlash and will somehow operate better than a spur gear drive. However, these are toothed belts and pulleys that we a talking about and toothed belts and pulleys can have backlash, just like spur gears. In fact, you would probably get less backlash with a high precision set of spur gears than you could with a set of pullies and belts made by different companies. If this were a non-toothed belt system then you would have no backlash, but you could have slippage. Belt stretching can be a concern, but these days most belts are made with materials that are pretty resistant to stretching.

So, I would recommend going with the classic Atlas in your case. You won't really be missing out on anything except the extra cost.


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ghataa
professor emeritus


Reged: 06/20/11

Loc: Central, NJ
Re: Classic Atlas or New Alt/Azm Atlas? new [Re: EFT]
      #5688878 - 02/19/13 01:02 PM

Thanks for the responses guys.

Ed and Steve: I really appreciate the recommendation given my AP focus. Thanks for saving me some cash!

Best,

George


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Lane
Post Laureate


Reged: 11/19/07

Loc: Frisco, Texas
Re: Classic Atlas or New Alt/Azm Atlas? new [Re: ghataa]
      #5691900 - 02/20/13 10:44 PM

I thought the point of the new belt drive mounts was to eliminate periodic error by eliminating the teeth. What good is belt drive with teeth?

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