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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.
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
Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
Mount: Skywatcher HEQ5 Pro with Rowan Belt Mod
Stuff: ASI EAF Focus Motor (x2), Orion 50mm Guide Scope, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
Camera/Filters/Software: ASI 533 mc pro, ASI 120mm mini, Orion SSAG, IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
Dog and best bud: Jack
Sky: Bortle 6-7
My Astrobin: https://www.astrobin.com/users/Juno16/
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
Go Jim go! Awesome!
Bryan 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 Binoculars: Pentax PCF WP II 10×50, Bresser Corvette 10×50, Bresser Hunter 16×50 and 8×40, Garrett Gemini 12×60 LW, Gordon 10×50, Apogee 20×100