Astrophotography Group April

What we do in the Shadows – Part 2

This talk starts by reviewing what we talked about in Part 1:

1 What makes a good astrophoto – SNR
2 Signal (the photon funnel)
3 Noise (the square root of the signal)
4a, b Myths (f-ratio and ISO / Gain)

In Part 2 we will talk about:

4c Dynamic Range (the relationship to SNR)
5 Subexposure
6 Fun With Mathematics