Schoolboy Error

[dark knight]

So finally got out under the stars Friday night to test my kit out (specifically my new 2600mc pro OSC and autofocuser) on the Pinwheel Galaxy. I've gone back to nina for control and acquisition with a new mini pc mounted on the telescope and connect wireless to my indoor pc. I have to say everything worked wonderfully, nice to have a camera that is so sensitive with integrated cooler!!! In fact once I got to grips with my kit again I thought let's have a go at the Pinwheel Galaxy, auto focus worked flawlessly, I was impressed, so I set up sequencer and shot 30 180sec subs and another 20 120 sec subs followed by matching darks. In the morning I chucked them all into DSS and waited for what I thought would be a great image to process,,,the result,,,,,a greyscale image, I checked all the subs and all appeared to register as greyscale!!!  What the %*&£!!!! I thought. After another hour of trying to pin the blame on software I realised something,,I had left my Lenhance filter in the optical chain!!! Of course now all made sense because the lenhance is a narrow band filter!!!! Schoolboy error most definately!!!

[RT65CB-SWL]

At least you remembered to remove the end caps! 😜

[dark knight]

Thanks Phillip lol, I've put it down to over excitement on my part, just got to work out what to use those subs for now.

[Peter Drew]

3 hours ago, dark knight said:

Thanks Phillip lol, I've put it down to over excitement on my part, just got to work out what to use those subs for now.

Reminders?     🙂

[rickwayne]

Eh, when you revisit the target, create a synthetic luminance channel and stack the unintended NB subs to refine that a tad.

[dark knight]

Great idea rick, at least that way they won't be wasted.

[Fegato]

I don't use DSS, but I'm a bit confused as to why you got a greyscale image? L-enHance is a dual narrowband filter and should give you a colour image if you use OSC and process it as colour. It's also got quite wide bands, particularly on the blue/green, and should give you a decent M101, enhancing the Ha quite nicely (albeit, longer exposures required).

All I can think is - did you run debayer on the subs? It will be greyscale until you do this...

[david_taurus83]

As above, you might need to tell DSS the Bayer pattern for the camera, RGGB. Also, you really don't need to use darks with this camera, as long as you are dithering to remove hot pixels. I just use a master bias and dither for both my 533MM and 2600MC.

[dark knight]

Yeah I don't understand it either  I loaded the subs into dss as  lights for a quick an rough stack to see what was there but the registered files showed as greyscale, I'm sure I set the rggb and debayered, I'll have another look and check dss settings. I'm very slowly trying siril, but it seems complicated to me, having to convert files etc. I'll have another go.

[dark knight]

Just loaded subs back into dss.

[dark knight]

For some reason they are greyscale 16bit?? Could I of saved them incorrectly when acquiring them in NINA??

[Fegato]

That's what you would expect out of NINA - 16 bit greyscale. The debayer should turn it to RGB. If you make a sub available I can look at it in Pixinsight and debayer if you want?

[Fegato]

NB for the future, now you've got the 2600, I would save in FITS format in NINA rather than TIFF so you get all the Astro header data included.

[david_taurus83]

CFA (Colour Filter Array) is set to NO so it thinks they are mono. You need to manually set DSS to debayer.

[dark knight]

As far as I can see dss is set to debater, could it be I saved the files as tiff instead of fits

[Enceladus Dan]

Would sirill be able to convert tiff to fits? I tried sirill for my comet ztf image and all my cr2 were converted to fits before I could do any of the other processes. 

I found sirill a bit complex and ended up using a trial of PI to do my image, but it it's first step creates you some fits maybe from there DSS will accept them and apply the debayer? 

I'm following this as I have bought a 533mc and not managed to use it yet due to clouds. 

 

Clear skies

Danny

[dark knight]

Dan siril will convert the files but then may as well use siril to do the stacking etc too. I have siril but find it complicated too!!

[Fegato]

Spotted this - does sound like you need to convert your TIFF files to FITS...

https://groups.io/g/DeepSkyStacker/topic/tiff_files_come_out_as_gray/80969992?p=