AVX Guide Rates

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JayTee
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Re: AVX Guide Rates

#21

Post by JayTee » Mon Jan 20, 2020 4:36 am

I have read that Canon's do well at high iso's. If I can get good performance at 300 seconds at iso 800, what would be the advantage of trying iso 1600?
Yes, I knew that the Nikon's best ISO is around 200, so 1600 may not give you a signal boost further away from the noise floor. More likely it will raise the noise floor higher than the gain in signal. But I'm one to give things a try just so I can say I tried it and the experts were right again! Realistically, the only thing it can do for you is to shorten your exposure time if your guiding becomes problematic at 300 seconds.

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Main: C-stron CPC1100 #2 Scope: 8" f/7.5 Dob mounted Newt AP Scopes: TPO 6" f/9 RC, ES 80mm f/6 APO G&G Scope: Meade 102mm f/7.8, Bresser 102mm f/4.5 Guide Scopes: 70 & 80mm fracs Mounts: C-stron AVX CGEM & GT Alt-Az, Meade DS2000 Cameras: Canon T3i (x2), ASI120MC Binos: 10X50,10.5X70,15X70 (x2), 25X100 EPs: ES: 21 100°, 30 82° X-Cels: 9, 12, 18, 25 Clubs: RCA & HAS
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#22

Post by Juno16 » Tue Jan 21, 2020 3:34 am

Out again tonight shooting M78 again. Been imaging about 90 minutes. Reduced the guide scope exposure to 1.0 second and so far getting the best guiding that I have ever gotten averaging between 0.9 and 1.1 arcsec total rms error.
Probably will go haywire sometime, but I will take it for now. Only have about 90 more minutes before it goes into the trees.

Jim
Jim

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#23

Post by bladekeeper » Tue Jan 21, 2020 4:53 am

Juno16 wrote:
Tue Jan 21, 2020 3:34 am
Out again tonight shooting M78 again. Been imaging about 90 minutes. Reduced the guide scope exposure to 1.0 second and so far getting the best guiding that I have ever gotten averaging between 0.9 and 1.1 arcsec total rms error.
Probably will go haywire sometime, but I will take it for now. Only have about 90 more minutes before it goes into the trees.

Jim
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Scopes: Apertura AD12 f/5; Celestron C6-R f/8; ES AR127 f/6.4; Stellarvue SV102T f/7; iOptron MC90 f/13.3; Orion ST80A f/5; ES ED80 f/6; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen Polaris
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