Not done much imaging since DSC 2nd April since it has been tiny galaxy season and I am in Bortle 8 anyway. Then the summer solstice, so short nights and no astronomical darkness. But Ha often works.
I don't normally post a half done image, but since little has been posted on the forum recently, I thought I would post up my progress so far. I have tried a few Oiii and Sii subs, but I think I am either going to have to wait for Astronomical darkness to come back, or wait for a DSC to get the rest of the data on this target.
Here is my Ha so far 37 x 600 - just over 6 hours between 11pm and 2am:
(https://cdn.astrobin.com/thumbs/1c3xMAe5yzPp_2560x0_n1wMX-gx.jpg)
I got the idea from this image on Astrobin, but this is a 56 hour image taken from Sierra Remote Observatories in the USA.
WE CAN BUT DREAM!!!!
https://www.astrobin.com/8nqfnh/
Carole
Here is a more stretched version.
(https://cdn.astrobin.com/thumbs/iOM15-LfCYNB_16536x0_b9muqi8S.jpg)
Looking excellent Carole 8)
I find that imaging in Ha/NB and keeping the RGB exposures at <5min during summer/nautical twilight, I can achieve good enough results. Nautical twilight only comes at around 11pm and lasts until 3am but that allows targets to be completed in 3/4 nights.
Roberto
Thanks Roberto. In this case l am doing Hubble Palette and l think l need darker skies for the Oiii and Sii.
I can only do about 200 secs RGB on my Samyang lens before the sensor whites out.
Carole
Oh, I hand't realised this was with the Samyang. Yes, you'd have to keep exposures very short with such a fast lens. I'm imaging at f/5 in RGB. You've done really well in Ha.
Roberto
Thank you Roberto
Carole
Just checked the image and it is fantastic , but the stars are all white and sterile.
Roger