Author Topic: CGX-L or MyT?  (Read 11 times)

Jon Venning

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CGX-L or MyT?
« on: December 29, 2017, 05:52:33 AM »
Hi all, I'm thinking of getting a new mount to support all my OTAs (SV70T, Tak FS128N, C9.25"). Currently I have an AVX with a Stellarvue 70T on it which I am happy with, and I've also used the Celestron 9.25" SCT on it fairly well though now I realise it was too much scope for this mount. (I also have an LXD75 which is mainly for solar.)I'm getting a new 5" refractor and therefore in the market for a new mount (currently planning to put it on the LXD75!). Before I list my choices, I should say that the biggest factor influencing my preference for Celestron is StarSense. I really like how it handles my alignment without me thinking too much about it and within minutes, I'm all aligned and ready to go.  I've done the 1-2 star manual alignment with the Meade mounts (and also before with the Celestron mounts) and I find it cumbersome. I tend to leave my mounts outside covered with a 24/7 cover and I am usually able to pick from the night before though if things get moved, then I have to realign and StarSense is great for that. Celestron mounts are also something I'm familiar with.

My choices for the new mount is either the CGX-L (payload 75lbs) and MyT (payload 50lbs). Right now, the heaviest OTA I have is the 9.25" SCT, around 20lbs. The Tak weighs a bit less than that. Factor in accessories, etc. and the total weight should be < 25-30lbs, which should easily be handled by both my choices. On the other hand, if I get the MyT, I'm not sure how much I could expand. The max I would think of expanding is likely a 11" SCT but I'm not sure if the MyT can handle that (around 30lbs+ with accessories). This is a minor issue (for visual, I have a UC 18, so it's really not about the aperture).

In terms of the StarSense feature, it appears that with the MyT, I get a software-based solution, where I could polar align with something like PoleMaster, and then sync to a star with the TheSkyX software. I'm not sure if my impression is correct or not. If I have to do an N star manual alignment like I'd have to if I didn't have StarSense in the AVX, then that's probably a big ding against the MyT for me. So has anyone used this mount and what are your experiences?

The nice thing about the MyT is the weight. I'm getting the CGX-L instead of the CGX because there's more capacity and I feel it would handle a relatively light OTA more stably but it looks big. I did manage to set up and use my UC18 by myself so I should be able to handle it, but it is going to stress my back and I'm not getting younger.

The CGX-L is about half the price of the MyT + tripod. While I can afford both at this time, the more money there is left over, the more it can be used for other things.

Finally, in terms of imaging, I prefer to do short exposures and stack them. By short I mean anything from 15 seconds to 2-3 minutes. So no guiding but I'm not averse to it, just haven't seen the need for it. The cameras I get typically allow this (my recent purchase is the QHY163M). So if the MyT will be superior at getting longer unguided images, then I would seriously consider it. I've seen comments by other owners indicating 5-10 minutes unguided, but not sure if this is routine performance for these types of mounts.

So if money wasn't an issue, which mount would you get?

I've dropped other high end mounts (AP, or even Losmandy) from consideration because of (lack of) the autoalignment/StarSense feature. MyT seems to have the computer-based interface down really well, and their software runs on Mac. Currently I run my AVX with ASCOM-based drivers on a Windows notebook which works but it feels really kludgey.

--Ram
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John Abreu

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Re: CGX-L or MyT?
« Reply #1 on: December 30, 2017, 09:34:38 PM »
If $ is no consideration then getting the Paramount is a no brainer.  However, if you are doing mostly short exposure stacking then why spend the extra $ without tangible benefit of longer exposure unguided performance?  The MyT is over $6k the CGX-L is $3.3k and the CGX is $2k.  Given your current scopes, the lowest priced CGX can handle everything you have and its easier to transport than the CGX-L.  Seems to me you can have an extra $4k in your pocket to get a super nice APO or Edge SCT or maybe invest in a new full frame camera like the upcoming ASI 094.  Not sure why you would bother with the higher priced mount given your stated goals at this time... just my

Al

Mike Partoza

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Re: CGX-L or MyT?
« Reply #2 on: January 04, 2018, 09:13:56 PM »
Hi Al, thanks for responding! You're mostly correct, but when I say "short" I really mean the shortest exposure that the mount can handle. I've been limited to 2 minutes because of the AVX (and that too with the SV70T---with the 9.25" SCT, I think the max I could do was a minute at F/6.3, and most of the time it was less than 30 seconds until I got Polemaster). So the fact that the MyT from reading about it seems to be able to do longer unguided images is what has put it into consideration. *

Also, I may go to a 11" SCT, so that's about 30lbs. If you're saying the CGX (not CGX-L) could handle this just as easily/well as it could handle the 9.25", then I must say that this has not been my experience with Celestron mounts. I find that the lighter the payload, the better it tracks and in general sticking to < 50% of the stated capacity is the wise thing to do with these mass market mounts. I have read claims that the CGX* mounts rated capacity extends to imaging also but that really seems too good to be true. Nonetheless, the difference in price between the CGX and CGX-L is about $1300, so relatively it's still much lower than the difference between the CGX-L and MyT.

If I got the CGX-L, I could experiment with things like putting the SV70T on top of the FS128, or even do a dual saddle with any two of my OTAs (even the C925 and the FS128 for example).

I guess I'm looking for a hassle free system that will let me do the long unguided exposures and automated alignment. I've worked out a system with StarSense, PoleMaster, and my AVX and it makes everything work a lot easier (and a lot better IMO). I can even image from the comfort of my bedroom once polar aligned. I'm assuming I can reproduce this with the CGX-L and go a bit longer even perhaps. If the MyT along with the software add ons can do what these two pieces of technology can do, and offer significantly longer unguided exposures (say double, given the price difference), then it would be worth it (especially being able to do it on a Mac!). This is why I'm struggling with this decision now.

--Ram

* - with the newer CMOS cameras, the nature of the target affects the length of the exposure. I just did a stack of 120 x 15s subs for M31 with the SV70T and I was very happy with the result. But fainter targets may require longer exposures and I can go up to 2 minutes with the AVX and SV70T after I get a good polar alignment with PoleMaster. But I can't try 3 or 4 minutes because I don't think the mount could do it.

laucongsnagal

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Re: CGX-L or MyT?
« Reply #3 on: January 09, 2018, 07:35:56 AM »
I am mostly in agreement with your conclusions and as I said in the very beginning of my first reply, you really cannot go wrong with the MyT except of course for the cost issue.  Another consideration is portability and setup.  This is why I was suggesting the CGX over the much larger CGX-L. If you are setting up each night, having a lighter and easier mount could be less stressful.  Matter of fact, if you can set up and leave your equipment outside then arguably you could buy 2 CGX's and have 2 separate imaging rigs going simultaneously. That is my setup. I have 3 imaging rigs running simulataneously, a CGX, a CGEM and a CPC11. I routinely capture narrowband, wide fov and I do EAA or planetary on any given night, all controlled from inside so I don't have to deal with bugs.  I could easily have gotten a premium mount instead of having 3 cheaper celestron mounts, but this way I can collect more data and see more and accomplish more on those exceedingly rare nights...  To each his own... Do what you feel makes you the happiest and lets you use what you have.

AlP.S.  As to your worry about guiding.  I guide all three of my mounts.  It does not bother me at all, once setup initially my guiding is the same each evening and just needs the click of a mouse button to get started.  Although the MyT will give you the best unguided performance under 3-4 minutes compared to the cheaper CGX/L if you go much over 3 mins you may find you need to guide as well, and certainly over 4 mins even with the MyT you will need to guide at focal length much over 700mm i bet. So ultimately, if you buy the MyT you may find yourself still needing to do autoguiding in any case...

Clyde Duke

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Re: CGX-L or MyT?
« Reply #4 on: January 10, 2018, 04:16:39 AM »
My MyT barely guides better than my CGEM DX and it required a new worm and a regreas to get to that point.  It is a beautiful mount on the outside though:-/  I was looking at a premium 12" truss that is 60lbs.  I told them that was too heavy for my MyT and they told me they had one on a cgx-l showing a PE of only 2".  Needless to say I have been interested in picking up one myself ever sense.

rentireacen

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Re: CGX-L or MyT?
« Reply #5 on: January 10, 2018, 04:17:54 AM »
Quote
So if money wasn't an issue, which mount would you get? .

If cost wasn't an issue, I wouldn't get either of them.

The strength of the MyT over a CGX-L is that it will track better, guide better, and just be a better mount to use all around. The strength of the CGX-L over the MyT is the payload capacity (and I'm not sure that the verdict is in yet about whether there is a "real world" difference in capacities between these two mounts, since the two companies have a history of stating their capacities differently).

If cost really wasn't an issue, I would get either a Paramount MX+ or an AP-1100. You'd get both the payload capacity and the performance.

If you have the budget and really have no plans to exceed 40 or 50 pounds (and I think that's most people), then I would look at the MyT or the Mach1. The 10Micron GM1000HPS also plays in this space and is very highly regarded. I wouldn't compare the CGX-L to any of these.

Kyle Montes

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Re: CGX-L or MyT?
« Reply #6 on: January 10, 2018, 03:42:00 PM »
There are other mounts worthy of consideration - Avalon Linear, 10micron (ok, probably a bit expensive) AP mach1...

Owen Richter

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Re: CGX-L or MyT?
« Reply #7 on: January 11, 2018, 09:23:31 AM »
I read what you said about StarSense. It's great--for CELESTRON mounts.

It's likely irrelevant for others. For example, with my Mach1, I don't really do anything for star alignment. After polar align (I use Polemaster), I just start APCC (initializes mount and unparks), then use SGP to slew and center on target. That's it. Really. The complete sequence:

Power mount and computer.
Start APCC & init (one click)
Start CDC (carts du ciel)
Start SGP. Click on connect mount.
Click object in CDC. Right-Click and click "Copy coordinates"
Go to target in SGP. Paste coordinates (one paste does both RA & DEC--great feature)
In SGP, same location: Slew now/Center now (the Center auto-syncs the mount). I'm within 5px (I could get it down lower if I reprogram the plate-solving).

I can probably do the entire thing in under 2 minutes, much of the time being application start. If the apps are open, we are talking order of 20 seconds.

If I could leave my mount outside overnight, the next day I could simply resume from park and just goto wherever I want to, with near-perfect accuracy.

I am not familiar with MyT, but I imagine it's a similar situation.

>If you are dedicated to the hobby, and you can afford a premium mount, get a premium mount. I very much doubt you will ever regret the extra cost, or that if you *don't* buy a premium mount, you'll say "I'm so glad I didn't spend the money."

Bill Pham

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Re: CGX-L or MyT?
« Reply #8 on: January 13, 2018, 03:56:17 PM »
Quote
Quote
So if money wasn't an issue, which mount would you get?  .
If cost wasn't an issue, I wouldn't get either of them.The strength of the MyT over a CGX-L is that it will track better, guide better, and just be a better mount to use all around.  The strength of the CGX-L over the MyT is the payload capacity (and I'm not sure that the verdict is in yet about whether there is a "real world" difference in capacities between these two mounts, since the two companies have a history of stating their capacities differently).If cost really wasn't an issue, I would get either a Paramount MX+ or an AP-1100.  You'd get both the payload capacity and the performance.If you have the budget and really have no plans to exceed 40 or 50 pounds (and I think that's most people), then I would look at the MyT or the Mach1.  The 10Micron GM1000HPS also plays in this space and is very highly regarded.  I wouldn't compare the CGX-L to any of these.

I don't think there is a lot of evidence that guiding is really better on a MyT.  If it is I certainly haven't seen it on mine.  Unguided tracking is TBD if the pe is below 7" then there really isn't a difference there either. 
The worm gear IS bigger on the MyT and I believe it will handle 50lbs no problem (I have put about 40 on mine). However, I don't think it will handle a C14 or 12" 60lb truss tube and it appears a CGX-L will.