Here is the colour version of the Ha version earlier.
Ha LRGB 60 30 30 30 30. I still need to dial in some tilt but I corrected some of it already (more correction needed as well).
I am not sure but I think because this camera is so highly resolving it may be showing up differences in the focal point of my Astrodon filters. Not sure yet.
But I can this camera will require great accuracy. Otherwise it pretty much acts like any CCD camera. Calibration was no trouble.
Great result... but....(sorry) Alnitak has uber-swamped the field.
(I won't be so crass as to point you to my KAF16803 version of the same field)
Could it be the mode you are using has insufficient well depth
None the less, a very fine HH
I personally don't mind Alnitak blazing like that but I get your point.
If I do more time on it I'll try the mode 3 (extended full well mode) and see
what difference it makes. The 16803 has been the king of full wells and yes it can capture Alnitak quite well, done it several times.
Next clear night.
Quote:
Originally Posted by marc4darkskies
A very fine image Greg! Nicely done!
Yeah, I suppose Alnitak is somewhat overwhelming but it doesn't detract, it just distracts.
Thanks Marcus.
This camera has an extended full well mode, I think its something crazy like 175,000 electrons. So I'll try that when I add to it.
Alnitak is the big hurdle on this part of the sky.
Semantics aside, overall, an excellent Horsey Greg
Mike
Hehe, yes I am happy with it for a first light. It can only get better from here.
Quote:
Originally Posted by DavidTrap
Very nice Greg - I've had little chance to use my camera over summer...
Are you able to share what mode you used for this broadband image?
DT
Mode 2 Gain 26 offset 10.
I think these are the default settings for Mode 2. Mode 1 for narrowband and Mode 3 for fast large optics for the extended full well. This mode might be more appropriate for the Honders at 305mm aperture and F3.8.
AP130GTX with the quad compressor might be good with mode 3 as well or stick to Mode 2 for broadband imaging.
I am not sure how much offset affects things. I experimented with my QHY294M and 2 quite different offsets. I checked the images in CCDstack - they looked almost identical. The histogram peaks shifted slightly.
Perhaps a higher offset can remove some of the background banding along with higher gain.
These Sony sensors have a dual gain amplifier so read noise drops significantly at some point. I am sure that point is in the graphs on the QHY site. I looked it up, its Gain 26. Read noise drops considerably.
)
