Thursday, 31 July 2025

M31, The Andromeda Galaxy


This image was taken from the Gower Peninsula under clear sky conditions with stars visible down to about magnitude 5.8. I was using a Vixen DX mount, an Atik 383L mono CCD camera, a 200mm lens with  a set of astronomik narrowband and RGB filters. I took two minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of noise and  vignetting in the final image.

The total exposure time was 20 minutes using an O111 filter, 60 minutes using a H Alpha filter, 60 minutes using an IDAS filter, 45 minutes using a blue filter and 30 minutes using green and red filters.

Equipment used



 M31, The Andromeda Galaxy 



Wednesday, 30 July 2025

SH2-129 The Flying Bat nebula in Cepheus.

This image was taken on two separate evenings under clear sky conditions with only light pollution to contend with. I was using a Vixen Atlux mount, a ten inch reflector piggybacking my Atik 383L mono CCD camera with a 135 mm lens attached to it. The filter was placed on the front of the lens using H Alpha, S11, O111 and RGB  filters. I captured two minute sub frames with matching dark frames and combined them with  flat field frames to reduce the effect of noise and vignetting in the final image 

The total exposure time was two hours using a H Alpha filter, Two hours using an O111 filter, 20 minutes using an S11 filter and ten minutes for each RGB filter.

RGB



Narrowband