Colour in Seestar S50 images

3AC9bx99

A lot of images of nebula I take are almost always all red in colour, blues, yellows are not there. I don't use external processing software, just what's available in the Seestar app and Android photo editing. I take it that is just the way the Seestar is, being more sensitive to red light. Can the colour palette be improved upon in future models of the Seestar?

Lilo

3AC9bx99
It's LP dual band filter. It passes only Ha - red and OIII - green.
Try some nebulae with OIII emission, Veil for instance, and you should see green.

SKG95T28

3AC9bx99
If you live in Canada or USA, the red is cause this summer by the polution done by the forest fire.

Support@Seestar

Perhaps you can contact our technical support through this link https://support.zwoastro.com/ and upload one of your single FIT images so we can take a look at what might be wrong.

3AC9bx99

Elephant Trunk A image captured, in EQ mode. Just shades of red.

3AC9bx99

East Veil image taken in EQ mode. Only 26 mins. What colours can you see?

Lilo

3AC9bx99
Yep, something is wrong with it.
Should be like

3AC9bx99

You have a good image. I have played around with Graxpert and Siril and Microsoft Designer and now get the following on the following image using same fits file.

3AC9bx99

I think my focusing is out, dark frame needs to be redone, and of course a longer imaging time. Only 26 mins at 20s. But I have more green now with external processing. Autofocus is not sharp enough. I need to manually adjust with a Bhatinov mask on the next clear night.

Lilo

Mine both are 37min each, city Bottle 6-7, only seestar internal processing
Your's looks more like artificial "Hubble palette"
Sometimes I want to experiment with pixel math to shift it into red-blue, bit a bit lazy so far )

3AC9bx99

Yes mine is poor. I sometimes think just using the seestar internal processing works best. Autofocus is out. Need to try again perhaps with a darker sky. May redo flats while I'm at it.

3AC9bx99

I have now adjusted the default focus position, and retook the East Veil in AZ mode with 10s over 30 mins. Processed in Graxpert and Siril. I now have more green in the image as opposed to almost all red.

wvreeven

In nearly all emission nebulae OIII is MUCH MUCH MUCH fainter than Ha. So without extensive processing all images will predominantly show red. Notable exceptions are planetary nebulae but most of them are too small for SeeStars. Exceptions are, for instance, M 27, M 57, M 97 and NGC 7293.

Lilo

wvreeven
Look a couple of posts above.

wvreeven

Lilo You didn't mention planetary nebulae 🙂 And my explanation is more general as well. Anyway, we're both trying to say the same and to help TS.