NGC7331 - Newtonian 300 F/D 5.3 - new ASI 385

xs_man

Hi Sam, ;)

Hi All,

A classical DSO target, NGC 7331 galaxy for this thrird test with my new camera

ASI 385. I use my 300/1600 Newtonian and no filter to have maximum light

flux. But the main drawback is to have a correct white balance, and I failed

here !

For this session, I take care to set capture in 16 bits during November 7/8 night.

I only mixed 5 seconds exposures. I 've posted the final image, a raw image, a stack

with 10 images unprocessed, and a stack with 10 images and DDP processing. It may

be interesting for EEA fans.

I previously have a little problem : on the Raw image, stars were saturated but the

level is not at 254 as expected for 8 bits mode. It seems that the dynamic is reduced

or cut by a threshold. It was just a problem of Gamma adjustment, to set to 50%

in SharpCap. And now it's OK !!

An other great new : ZWO changed the minimum value for the anti-amp glow activation.

Previously it was 1 sec, now it's 500 ms. Very very cool for bright DSO imaging !

I have a NGC6905 to process...

To be continued...

SETUP :

--------

Newtonian Orion Optics 300 mm F/D 5.3, on EQ-6 Mount

------------------------------------------------------

ZWO ASI 385 without filter,

Acquisition software : Sharcap 3.0.

1329 x 5 seconds exposures.

Gain = 388

105 Darks.

Visual sort out of Raw images.

Registration with DSS.

Processing and post-processing with Iris + Photoshop.

Final image, resized at 80% :

A raw 5 sec exposure image, resized at 80% :

10 raws stacking resized at 80%, no processing, no darks :

10 raws stacking resized at 80%, DDP processing, no darks :

~~Albéric~~