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    Default Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70



    I'd like to consider a goto mount/tripod in combination with relatively light/lower power RA binoculars and am wondering if it would be crazy to try using the 8.9 lb Orion BT 70 binoculars on the Celestron SkyWatcher Allview mount which has a (load) capacity rating of 9 lbs -- essentially maxing out here.

    Wondering if being right on the limit is realistic (wear and tear on gears/motors?)... particularly when it comes to using the computer-driven tracking on this altazimuth mount?

    Part of the goal here would be to get combination of RA, goto, binoculars for around $1000. Suggestions for alternative bino/mount-tripod configurations are most welcome... Thanks! -- Dave

  2. #2
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    Default Re: Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70

    If you are within the manufacturer's load rating, you should be fine. It's only if you are planning to do astrophotography that you need to reduce that limit further.

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    Default Re: Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70

    I don't know much about Celestron SkyWatcher Allview mount so can't comment on it. However, I've had a SkyWatcher SynScan AZ GOTO mount for over 3 years now. It has an 8 pound payload but I run it between 10 pounds for visual work and 12 pounds for photography. The mount has accurate gotos and shows no ill effects after three years of operation in this overweight condition. Balance is the key.

    Given the commonality of parts and similarity of drive design (Celestron SLT, prodigy,& 4/5SE, SkyWatcher SynScan AZ and Merlin, etc.) I suspect that the All View will have no problem operating at max load.
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    Default Re: Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70

    SXINIAS -- hey thanks for your comment -- I do believe the AllView is a derivative of SynScan AZ as you suggest and it's great to know that realworld experience suggests they'll hold up at the load limits.

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    Default Re: Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70

    Keith - thanks for making the distinction between viewing and astrophotography... being new to astronomy, I expect that any AP I'll do early on might be very simple wide-field photography using just my camera on the mount and the weight in that case will be very low.

    I assume that the excess load is needed for astrophotography to ensure smoothest possible tracking?... or are there other effects that happen if one attempts AP near load capacity of the mount?

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    Default Re: Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70

    Update -- I may be able to get a "hand me down" Celestron Nexstar 5SE mount/tripod (same as used for 4SE?) -- this would give me a bit more breathing room on load capacity (vs. SkyWatcher AllView) as Celestron rates it at 10lbs, but I'd give up auto-panning and time-lapse for general photography. However, I also found an interesting article (web supplement to Astronomy magazine) about how to DIY adapt this mount to the BT70 binoculars... so this could be a great solution for a goto bino.

    The adaptation requires opening up the casing on the Nexstar mount and fashioning a replacement cover for the exposed parts, so not too hairy for a first DIY project, it seems.

    It also appears that the Nexstar 4/5 SE mount has a kind of built-in wedge capability which I guess might be helpful for (lightweight) astro photography?

    Here's the headline/byline/date line for the Astronomy article for search purposes:
    Make the BT70 binoculars "go-to"

    Mount Orion's binocular telescope to a Celestron mount for ultimate two-eyed observing.

    By Phil Harrington — Published: January 24, 2008

  7. #7
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    Default Re: Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70

    Quote Originally Posted by dfish View Post
    Update -- I may be able to get a "hand me down" Celestron Nexstar 5SE mount/tripod (same as used for 4SE?) -- this would give me a bit more breathing room on load capacity (vs. SkyWatcher AllView) as Celestron rates it at 10lbs, but I'd give up auto-panning and time-lapse for general photography. However, I also found an interesting article (web supplement to Astronomy magazine) about how to DIY adapt this mount to the BT70 binoculars... so this could be a great solution for a goto bino.

    The adaptation requires opening up the casing on the Nexstar mount and fashioning a replacement cover for the exposed parts, so not too hairy for a first DIY project, it seems.

    It also appears that the Nexstar 4/5 SE mount has a kind of built-in wedge capability which I guess might be helpful for (lightweight) astro photography?

    Here's the headline/byline/date line for the Astronomy article for search purposes:
    Make the BT70 binoculars "go-to"

    Mount Orion's binocular telescope to a Celestron mount for ultimate two-eyed observing.

    By Phil Harrington — Published: January 24, 2008
    Now that's a neat idea. If Phil likes it, it must be good. Now yet another project for me to do and another task for my 4SE mount.

    Removing the shroud is simple. The dust cover is probably not needed but can't hurt. BTW, The 4/5SE mount can be programmed to control a DSLR and with a little creativity probably could be fooled into doing a time laspe.

    I've also put my C6S OTA on my 4SE mount. In the azimuth mode, the combination worked very well. Using the wedge in the equatorial mode... I never could achieve an alignment with the C6S OTA but have no problems with a lighter telescope on the mount and typically can get exposure times of 45 to 60 seconds. The mount is capable of longer but it's difficult to get a precise polar alignment with the mount needed in the equatorial mode as it has no fine azimuth or altitude adjustments. In any case, the mount is capable of short exposure unguided astrophotography with a light load. see: 4SE Polar Alignment and Modified Latitude Adjustment Bar
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    Default Re: Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70

    sxinias... here's the direct link to Phil Harrington's BT70 Nexstar article... looks like he adapted the 6/8SE Nexstar mount... from what you said it sounds like the process for 4/5SE would be the same? Think the L bracket is the one available from Orion?
    Make the BT70 binoculars "go-to" - Astronomy Magazine

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    Default Re: Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70

    That is a neat setup, KSON has a similar binocular goto mount and adapter for large binos. My only issue is they may give weird viewing angles that are not comfortable for long extended viewing at that height / angle
    Name: Gus OTAs: ED 100 PRO refractor, Orion ST80 (not the CF), 8" Dob stuck in Canada Mounts:HEQ5PRO Synscan mount, Manfrotto Tripod CAMS: Guidecam Philips SPC900 webcams (4), Canon unmodded-450D DSLR

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    Default Re: Mount/Tripod Capacity vs. Load -- Celestron SkyWatcher Allview & Orion BT70

    Neat idea for a real dark site!!!!!!!!!
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