Ngc2997

[allan gould]

Been quite a while since Ive done some imaging, but I have been tuning my equipment - especially the ZWO1600 camera to see what it can do.
Only luminance atm, RGB to follow when the clouds go away.
10"GSO RC with ZWO1600-MM

[DJT (David)]

Hi Allan
Nice start.
Do you have any info on subs. Gain used etc? Interested as I have a similar setup I will be tinkering with if the skies ever clear.

Cheers

[allan gould]

David
Being lazy my settings were the default settings for high dynamic range ie 0 GAIN, 10 offset and 83 USB.
I live 4.5 km from BrisVegas and so the light pollution is quite high.
2 min subs barely showed the galaxy at a high stretch in SGPro however 5 min subs gave a decent image of the galaxy with a high stretch.
10 minutes and a lot of weird gradients started to show up.
I also chose these settings as ZWO state "The Highest Dynamic Range setting gives better results with longer exposures, as well as with brighter (light polluted) skies. This setting
avoids saturated stars, provides good SNR and very low read noise".
This camera at 10min exposures would work fine at a dark site but I'll have to wait til Astrofest.
NGC2997 is a mag 11.0 galaxy so not bad considering.
I collected about 20-25 subs, but did I say Im on the flight path from Brisbane airport - so lost a few. And then the clouds came in just before my meridian flip. The RGB images were garbage as they were shot trough with weird gradients of different hues, so I think Im going to stick to NB or to Lum exposures.Hope this helps, but I have to read up on other's settings but they are usually at dark sites and may not apply to my situation.
Allan

[RickS (Rick)]

Looks promising Allan. Stars and galaxy core look pushed a bit too hard but perhaps that was compensating for limited data?

Cheers,
Rick.