What are subs?

[jetset]

I've seen loads of people post images and say they consist of x amount of 'subs' but I have no idea what they are.

I've just watched a very good video by  Forrest Tanaka who explains 'Light' 'Dark' and 'Bias' frames but doesn't mention these 'subs'.

So what are subs?

Thanks

 

 

[vlaiv]

Subs - short for sub-exposures meaning single light frame used for stacking with other subs to give "full" exposure.

Sub is just light frame but with attached meaning of more than one light frame was recorded and all of them combined/stacked later

[HowardHopkinson]

You may find the following glossary of terms of use.

http://www.astropix.com/HTML/I_ASTROP/GLOSSARY.HTM

[jetset]

Great link. Thanks

[keeny]

what does    m6  m8  etc mean  it sound like motor ways to me lol   

[johnrt]

12 hours ago, keeny said:

what does    m6  m8  etc mean  it sound like motor ways to me lol   

The Messier Catalogue - https://en.wikipedia.org/wiki/List_of_Messier_objects

[keeny]

hi thanks far that cheers start to run my brain around it lol