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Thread: New CEM25 owner here, anyone out there have this mount?

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    syyntax's Avatar
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    Default New CEM25 owner here, anyone out there have this mount?



    just trying to get an idea of how many (if any) owners are out there.

    Any initial experiences / gotchas to look out for?

    Thanks!

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    Default Re: New CEM25 owner here, anyone out there have this mount?

    Just got one last month.
    Still struggling on making it working

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    zeezhang's Avatar
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    Default Re: New CEM25 owner here, anyone out there have this mount?

    Just got one this month and learning how to use now.

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    syyntax's Avatar
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    Default Re: New CEM25 owner here, anyone out there have this mount?

    I've been making progress using mine...

    for solar system viewing / imaging it's been pretty easy, a very rough polar alignment (level tripod, point it generally north).. then do a solar system align on mars or Saturn.. it stays in my field of view for a long time (at least a couple hours).

    I'm going to have to swap out to my smaller latitude adjustment knob, since I'm right at the latitude where the smaller knob is required.

    I got some 5 second unguided frames of the lagoon nebula the other night.. not bad for starting..

    Peppy2, bladekeeper and Dxer like this.

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    syyntax's Avatar
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    Default Re: New CEM25 owner here, anyone out there have this mount?

    How are others getting along with this mount?

    zeezhang have you been able to get yours working to your satisfaction?

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    Default Re: New CEM25 owner here, anyone out there have this mount?

    I have this mount for 2 months now with 2 sessions in after a month of cloudy skies. Unguided, my first session was on Bode's galaxy. I must of hit a perfect level and polar alignment because I had pinpoint stars with 2min exposures. I freaked out!. My second session the other night was of the Whirlpool. Best I could get was 30sec exposures without trailing. At 2min I was getting 1/4" trails. But trailing is trailing from the start. I should start guiding. The polar scope alignment procedure is great but the tuning knobs are finicky. When you tighten it moves. You have to tight/loosen both knobs evenly. I wish it was a cam type clamp. Next I set the tension screws as light as possible but gears still firmly seated and do a test slew for no skipping/binding. Once you get a smooth slew then I do a Goto and center my subject then I lock down the Dec tension screw a half turn. It seems once Dec is set only the RA moves (tracks). I believe trailing is the results of bad polar alignment.

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    Default Re: New CEM25 owner here, anyone out there have this mount?

    I started with the ZEQ25GT a couple of years ago, never had problems with it, and upgraded to the CEM25EC last year since I needed reasonable tracking accuracy without doing auto-guiding .. setup is easy, as is leveling, balancing, and drift alignment (I don't do the normal polar alignment since i can't see Polaris).

    Longest imaged on an 80ED was about 2 minutes, on a 120ED about 1 min. with some throwaways.
    Roger
    AT65EDQ, SW-80ED Pro, 120ED Pro, 11" EdgeHD
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    Default Re: New CEM25 owner here, anyone out there have this mount?

    Hate it. I wanted to control it with a laptop, never got it to work.
    Dennis
    Apertura AD12, Explore Scientific AR102, Twilight 2 and CEM 25 mounts, and Celestron Skymaster 12x60.
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    Looking at a light pollution map, I live in a red zone.

 

 

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