Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: RobertM on Apr 29, 2025, 14:12:53

Title: Wide field around the Cats Paw nebula
Post by: RobertM on Apr 29, 2025, 14:12:53
My first posting here for quite some while...

This image apture was with some of my older kit but processed in PixInsight using modern tools available now.

Capture was with a Samyang 135mm lens fully open at f/2 and a 2 second exposure at ISO 40,000 with an astromodified Sony A7S.  Unfortunately to reach focus I had to use a Baader Neodymium filter which added unnecessary filtering.


Click here for the Warts and all 4k version on Flickr
(https://live.staticflickr.com/65535/54483827652_f2fbb128a2_b.jpg)
 (https://live.staticflickr.com/65535/54483827652_224de6db0f_4k.jpg)

TFL Robert
Title: Re: Wide field around the Cats Paw nebula
Post by: Carole on Apr 29, 2025, 21:30:36
Oh Wow, so great to get these targets below our UK horizon.

Is this really only a 2 sec exposure in total?  Not a batch of 2 sec exposures stacked?  If so amazing. 
Title: Re: Wide field around the Cats Paw nebula
Post by: RobertM on Apr 30, 2025, 10:47:54
Yes Carole it was one 2 second exposure with the camera on a tripod.  SQM reading overhead was 21.9 at the time but not quite so good where the exposure was taken.