RASA - Atik - Rosette Nebula - 35 seconds

[RICH-DSO]

Celestron RASA
Etendue 800 cm2-deg2
Atik 460ex osc, binning=1
no guiding
Mount: Evolution alt-az
50 x 35seconds stacked in DSS
StarTools processing

https://www.astrobin.com/416429/?image_ ... 2&nc=&nce=

[happy-kat]

This one is my pick of your images, very nice.

[RICH-DSO]

h-k thank you for the comment.

[happy-kat]

The image is also showing minimal field rotation at the edges which is an achievement for the focal length of telescope, the target was probably in a favourable location for AltAz mount imaging. (I assumed you did not use a wedge)
The colours are great and vibrant as well.

[RICH-DSO]

The image is also showing minimal field rotation at the edges which is an achievement for the focal length of telescope, the target was probably in a favourable location for AltAz mount imaging. (I assumed you did not use a wedge)
The colours are great and vibrant as well.

Thanks HC, No, I don't use a wedge. At the time this photo was taken, the Rosette of Monoceros was located to the SW-W. I believe a West orientation is best for alt-az photography.
I have been able to get up to 90s unguided using a SCT9.25 and the RASA.

If I may ask you what do you think of these 2 M101. Follow the link,

https://www.astrobin.com/416558/?nc=user 6 hours of data

https://www.astrobin.com/416562/?nc=user 3 hours of data