N.I.N.A. Three Point Polar Alignment

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SkyHiker United States of America
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Re: N.I.N.A. Three Point Polar Alignment

#21

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chris_g wrote: Thu Sep 30, 2021 1:56 pm
SkyHiker wrote: Thu Sep 30, 2021 11:05 am Aligning the guide scope with the OTA for plate solving is a one time task, once it's done and you don't touch it you should be good for future sessions. I've done it when using a DSLR and it worked OK. Just find a bright star, Polaris for instance when you start out, to align on. One advantage is the wide FOV that can make plate solving easier. I had a period when the 2600MC had a much harder time plate solving than my SSAG, those problems are now gone for who knows why. Ekos makes it easy to switch cameras for plate solving. Congrats with your progress.
Thanks, I thought about polar alignment with the guide scope because I have to remove it from the OTA for storage and transport, I've only used it as a finder so far and it's worked great for that
The alignment of my SSAG depends on the setting screws only because the rest falls in the same position as last time once you tighten it in its bracket. So even when you take it apart it still realigns. The only exception is when you use the guide scope for a counterweight, which I usually do with my AVX. Then it has to be realigned in the DEC axis.
... Henk. :D Telescopes: GSO 12" Astrograph, "Comet Hunter" MN152, ES ED127CF, ES ED80, WO Redcat51, Z12, AT6RC, Celestron Skymaster 20x80, Mounts and tripod: Losmandy G11S with OnStep, AVX, Tiltall, Cameras: ASI2600MC, ASI2600MM, ASI120 mini, Fuji X-a1, Canon XSi, T6, ELPH 100HS, DIY: OnStep controller, Pi4b/power rig, Afocal adapter, Foldable Dob base, Az/Alt Dob setting circles, Accessories: ZWO 36 mm filter wheel, TV Paracorr 2, Baader MPCC Mk III, ES FF, SSAG, QHY OAG-M, EAF electronic focuser, Plossls, Barlows, Telrad, Laser collimators (Seben LK1, Z12, Howie Glatter), Cheshire, 2 Orion RACIs 8x50, Software: KStars-Ekos, DSS, PHD2, Nebulosity, Photo Gallery, Gimp, CHDK, Computers:Pi4b, 2x running KStars/Ekos, Toshiba Satellite 17", Website:Henk's astro images
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Re: N.I.N.A. Three Point Polar Alignment

#22

Post by chris_g »


SkyHiker wrote: Thu Sep 30, 2021 2:22 pm
chris_g wrote: Thu Sep 30, 2021 1:56 pm
SkyHiker wrote: Thu Sep 30, 2021 11:05 am Aligning the guide scope with the OTA for plate solving is a one time task, once it's done and you don't touch it you should be good for future sessions. I've done it when using a DSLR and it worked OK. Just find a bright star, Polaris for instance when you start out, to align on. One advantage is the wide FOV that can make plate solving easier. I had a period when the 2600MC had a much harder time plate solving than my SSAG, those problems are now gone for who knows why. Ekos makes it easy to switch cameras for plate solving. Congrats with your progress.
Thanks, I thought about polar alignment with the guide scope because I have to remove it from the OTA for storage and transport, I've only used it as a finder so far and it's worked great for that
The alignment of my SSAG depends on the setting screws only because the rest falls in the same position as last time once you tighten it in its bracket. So even when you take it apart it still realigns. The only exception is when you use the guide scope for a counterweight, which I usually do with my AVX. Then it has to be realigned in the DEC axis.
I might end up having to use mine as a counterweight as well, not sure yet. I ordered a new plate that should show up next Tuesday, the stock plate that came with the scope is limited on it's length and the tube ring nuts extend below the saddle so it can't be adjusted back and forth to assist in balancing, it barely balances now. Appreciate your input as always.
Image Cam: Canon 6D (Ha mod), 600D (Stock), SVBony SV405CC
Image OTA: EvoStar ED80, WO Z73, C8-A XLT
Mount: EQ6-R Pro Pier, AZ-EQ5 Pro Pier
Guide OTA: Orion 60mm, WO 32mm, ZWO OAG, SV501P
Guide Cam: ZWO 120mm, 290mm mini
EAA OTA: Orion ST80
EAA Cam: SVBony SV705C
EP: Baader Hyperion Modular Set
Filters: L-Pro Canon EOS C, L-eNhance, L-Pro, Optolong Ha 7mm, Optolong Oiii 6.5mm, Optolong Sii 6.5mm, ES H-Beta
Session Control: Mini PC/Win11 Pro, APT 4.1, PHD2 2.6.10
Processing: PixInsight, DSS 4.2.6, Adobe PS CC, Astronomy Tools Action Set, Star Spikes Pro
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