British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Community Member Pages John Bell
Image search

Milky Way


Expand image

About this observation
John Bell
Time of observation
10/07/2018 - 00:19
Milky Way
Observing location
North Cornwall
Sony A7S modded
iOptron SkyStacker
80sec f1.4 24mm iso8000
Like This Image

Amazed at the brightness of the milky way from here (invisible from home) Interested in id of the red (H alpha) region above Antares and near delta Oph. Presumably a LBN object.


nickjames's picture

That really is awesome. Is this really a single 80s frame? The reason I ask is the original A7S does strange things to the raw file beyond 30s. In fact, while the A7s is a stunning camera the Sony raw file format is really a pain. What firmware version are you using on the camera?

John Bell's picture

Sorry Nick. It is a stack of three subs. All at 80sec. Firmware version is Body ILCE-7S ver 3.20 I think that is an early version of the A7S-1. I've never worried too much about the so called Sony star-eater. It goes deep enough for me, and I routinely expose for 3 or 4 minutes at home.. My version of DSS stacker doesn't accept Sony raw files. I convert to DNG in order to stack.

nickjames's picture

John - Yes that's the firmware version in mine. I think the raw star-eater problem got worse with the mark 2 body. Anyway, it certainly didn't have any bad effect on this image which is really stunning.

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.