Thread: Hand held Orion
View Single Post
  #11  
Old 6th February 2019
wornish's Avatar
wornish wornish is offline
Senior Member
 
Join Date: Sep 2015
Location: Cheshire
Posts: 6,050
Thanks: 341
Thanked 549 Times in 429 Posts
Likes: 2,856
Liked 1,596 Times in 787 Posts
Re: Hand held Orion

The higher the ISO the shorter the exposure needed to capture the same amount of signal, but there is a noise trade-off.

Many people shoot astro shots at ISO800 or ISO1600 beyond that the noise becomes a real problem.

If you shoot with the 40-150mm + 1.4TC at maximum aperture and ISO800 then a shot of 5 - 10 secs on your tripod should be OK. Even 20 secs for fainter objects but you will see a little elongation.

Have fun.
__________________
Dave

My Flickr
Reply With Quote
The Following User Says Thank You to wornish For This Useful Post:
MJ224 (6th February 2019)
The Following User Liked This Post:
raichea (6th February 2019)