fwm891

Would PI's Linear Fit not have sorted the differences? Couple of points - Should the image be rotated 180° and it's a touch yellow thus reducing the blues.... Great image

Out of interest I wanted to see what I might get from a single image frame with the ASi 533 MC-Pro camera. Exposure 120s -15° C Unity gain. I chose an area containing some detail but not overloaded with a heavy star field and picked IC 5070 as a target. The image below contains the RAW 16 bit frame unprocessed and a processed version. I've not used any noise reduction routines at any stage as noise was my initial interest. Processing in PI. RAW frame opened, STF applied, Histogram Transformation, Dynamic crop and saved as png. Processed image: STF applied, mix of Colur saturation, Curves transfor, SCNR and Histogram transformation Dynamic crop. Saved as png.

Ended up about 2 with cloud from the north east but between 10 and 2 it was OK. Seeing varied at times a job to make out the MW, at other times it was more easily traced through Cassiopeia - Cygnus.. All image sub lengths 180s with 10 subs per image (NGC869 only had 6)? Full frames, no cropping, no noise reduction. Scope RASA 8 OSC Camera: ASI522 MC Pro (Gain 100 offset 70) -15 C Mount CEM60 Standard. Hope you like

Then again my CEM 60 updated without a hitch, it's a superb mount. N° 3 iOptron mount for me: an iEQ45 pro, CEM60 (Standard non EC) and a smaller CEM25P. After my NEQ6 Pro I won't touch SW again...

More subs last night - image now with 25x 180s subs, same processing

Keep forgetting with the RASA to flip the image: Image flipped 🤫

I was aiming for 20x 3 min subs but clouds tonight had other thoughts. I managed to get 8x 3min subs with the ASi 533 MC Pro mounted on a RASA 8 and CEM60 (Standard) mount. To keep some of the variation out of the basic calibration (Darks, Flats and Bias) my processing used PI's Weighted Batch processing routine. I'll use this same routine when I get the extra data. This has been followed with saturation, curve transformation, SCNR and File transformation. Saved as tiff's, png and jpg. The frame has not been cropped. No noise reduction used throughout as I wanted to see what the sensor would give me.

Further process this morning in PI and tweaks in PS. PI used via it's weighted pre processing script, then numerous minr applications of saturation, curves transform , SCNR, histogram transform.... before heading to PS. As you can tell from the file name this is the fifth version. There will likely be others but more subs under a moonless sky are needed to rescue this image. Imaged with an Altair 115 EDT APO, ASI 533 MC Pro and an IDAS NB-1 Triband filter.

Quick process of 10 subs : 5x 180s and 5x 300s Initial process and stacking in APP followed by a session in PI.

Hi Craig, I only got the camera today. I've spent most of the time since it arrived capturing calibration subs. It's suposed to clear here later so I'm hoping! I'll be using 100 gain and will probably play with the offset settings. I'll be looking straight overhead around Cepheus with an IDAS NB-1 filter mounted. The cloud still looks mighty thick!!!

Yes had a similar problem. Took it out to the obs and all went well. Now I have a stack of subs to play with...

Literally just arrived. Currently capturing 2 min darks. Display in SGP is superb, flat grey images at full screen, random H&C pixels evident at 400%. Captures at -15°C, unity gain/offset. Not even a hint of amp glow or banding. Will post a single and master dark once I've finished shooting them... Couple of screen grabs:

Was this one recorded ?

At present I'm sticking with OSC and an IDAS NB-1 filter. It's meant to be wide angle but I think the NB bands are clipped at f2. Processes quite well as a single RGB or split channel image.

Great image Goran - not tried this one. Must point my rasa 8 in that direction. Thanks for posting.

Wilkinson's sell a black flock paper with sticky backing (V cheap) used it on lots of small items and a 10" dob...

A 2" means you don't have to worry about the 'fit' between multiple adapters reducing the Cheshire's alignment. i.e. it fits straight into the focuser tube rather than having a 2" to 1.25" adapter then the Cheshire each held in place by screw anchors...

'FX' is full frame 'DX' is the cropped format. Nice image - re colour it looks green to me. Removing that would lift the magenta nebulae in the region.

@groberts I agree with Adreneline here. I quite often use APP for the calibration/registration/stacking parts of a process it removes (for me) any ampglow far better than PI. I also have evoled my own take on Jim's crib sheet Good luck it can and does get a bit frustrating in PI especially the calibration darks have to be same time/temperature.

Don't know the camera but you may be getting problems with the cooling if you've covered it completely. I have a 294MC Pro and I did exactly that to get dark, darks but the camera virtually over heated very quickly and poiwer usage was at 100% which is too high. Try and keep to circa 75% or less. I found that just putting the cap on and covering the cap with foil was all that was needed. That way the ventilation grills are open and the camera can disipate the heat from the cooling.