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  #21  
Old 16-12-2020, 11:35 AM
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muletopia (Chris)
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more on mesu

Robert,
Last night there there was a gusty wind so ground turbulence would be large,I did not look at the estimated jet stream speed.
My Mesu is pier mounted in a Sirius ob.
The attached PHD2 guiding picture was taken last night. The guiding telescope has a FL of 700mm and the guiding camera is a ZWO 120mm with 2Xbinning.
The guiding seems quite acceptable given the wind conditions and the fact that my polar alignment is about 2 seconds off.


I did not use have the Sidereal Technology mount model.


Chris
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  #22  
Old 19-12-2020, 11:42 AM
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Robert_T
aiming for 2nd Halley's

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Quote:
Originally Posted by muletopia View Post
Robert,
Last night there there was a gusty wind so ground turbulence would be large,I did not look at the estimated jet stream speed.
My Mesu is pier mounted in a Sirius ob.
The attached PHD2 guiding picture was taken last night. The guiding telescope has a FL of 700mm and the guiding camera is a ZWO 120mm with 2Xbinning.
The guiding seems quite acceptable given the wind conditions and the fact that my polar alignment is about 2 seconds off.


I did not use have the Sidereal Technology mount model.


Chris
that is pretty darned amazing.
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  #23  
Old 19-12-2020, 11:52 AM
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Robert_T
aiming for 2nd Halley's

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Join Date: Oct 2005
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ended up going with a more mainstream Ioptron CEM70

In case anyone is interested, in the end I put aside my hankerings for a premium mount until such time I have a more permanent setup.

Since I had the CEM40 and like it decided to buy it's new big brother, the CEM70 and I optron tri-pier. The head weight is a little lighter than the AZEQ6 but nominally this has 32Kg carrying capacity versus the AZEQ6's 20kg; not that I plan to get anywhere near that but can see me having a medium focal length payload between 15-18kg sometime next year.

The CEM70 claims to have +/- 3.5 arc second PE and they provide a graph with the mounts serial number that shows it has just that.

The CEM70 eagle landed in my backyard last night - see pics. All polar aligned like a snap (love Ioptron's ipolar) and I had enough clear sky for 30min or so to calibrate Phd2 and do a guiding assistant run (a negligible 300ms dec backlash which is pleasing; and for the 5-10min of guiding I got in before the clouds avalanched in was running 0.6-0.7arc-second and for the first time for me it even dropped below 0.5 arc second total RMS... not bad for a first run with a poorly balanced load (losmandy plate on espirit 100ed is too short, getting a longer one soon).

Some obligatory pics.
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  #24  
Old 19-12-2020, 01:15 PM
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gregbradley
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Looks great.

Greg.
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  #25  
Old 19-12-2020, 02:37 PM
jahnpahwa (JP)
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That sounds super promising
And a good looking rig to boot!
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