IFN Surrounding M31 Andromeda and M33 Triangulum
Here is a late processing of a widefield target from earlier this fall. This field contains two major galaxies The Andromeda Galaxy(M31) and Triangulum galaxy (M33).
The IFN "integrated flux nebula" is a very faint dust cloud which reflects light emitted by our milky way. IFM and ISM, interstellar medium, can be spotted sweeping across vast areas of our skies. There are several surveys which have mapped out the IFN whihc can be very helpful for identifying faint structures. It is very difficult to discern between gradients and ifn when processing structures this faint. I was able to pull a strong luminance image from the green channel and bring out the faint nebulosity by blending with the original iamge.
This image is 70 x 90s subs at iso 1600 using a full spectrum T2i and astronomik uv/ir cut clip filter. Lens was a pentax-m 50mm F1.7 stopped to F4