NGC 6888 bicolor

[Kenza]

Here is a bicolor ( Ha + OIII) image of the Crescent  nebula.

Optics: Equinox 120

Mount: Astrophysics 900 GTO

Camera: QSI 690 ( Ha 120’ ; OIII 60’  + Flats )

Post processing: Pixinsight and PS

Crescent Nebula Bicolor by Aleksandar Topalov, on Flickr

 

For guiding i use a Lodestar and a 180 mm FL guide scope which gives me an image scale of 9.6 arcsec/pix. My imaging rig gives me 1 “/pix. I know that the guider image scale is way too high. I should probably bring it down to 3-4. Maybe use a barlow? Then i think is Lodestar a good choice for a guiding camera with such big pixel size? You need a really long FL scope to get reasonable image scale.

How much would lowering the image scale improve my images? 

 

[teoria_del_big_bang]

That's a superb image 🙂 

Steve

[Guest]

Very nice Image  regards Martin

[alan potts]

Albeit with a small amount of movement in the guiding that is one hell of an image!!!

Alan