it is not difficult to shoot stars, and let me share some of my experience
if you do not have extra telescope equipment (e.g.Losmandy G11 with Celestron C8), we can either shoot a star trail or max ~30-50s else the star will be look like a small lines instead of blinking stars
- I do not own one those equipment so I do not know in depth .. but basic is those equipment will auto trace the stars so we can have longer exposure (which really need it while in real dark environment and do not want to shoot super high ISO
so ... I shoot as below
1. star trail
a. in real dark environment, make a rough estimation of exposure with setting below
i. biggest aperture as possible
ii. infinity focus
iii. manual focus
iv. mirror lock up
v. high ISO normally I use ~400-1600 depend the environment
vi. for the exposure depend on the light pollution ... may need few try to get right exposure
vii. shoot 2 picture .. the sky one could be very long and make the foreground over expose. so shoot another exposure for foreground
b. not so dark environment
i. biggest aperture as possible
ii. infinity focus
iii. manual focus
iv. mirror lock up
v. high ISO normally I use ~400-1600 depend the environment
vi. shoot 10-30s depend how bad is the light pollution
vii. set shooting mode to continuous shooting, and use remote to continue shooting for >20mintues (you should see some line or curve depend which direction you face)
viii. shoot 2 picture .. the sky one could be very long and make the foreground over expose. so shoot another exposure for foreground
viiii. use a software call startrail.exe (google it) and it can auto stack the all shots into single frame which combine the star as line/curve
x. shoot north and south :D , if possible... if you prefer circle/curve compare to lines
xi. I use a software load into my android call skymap .. real coold application, you should have it , if you love night photography
or .. for both shooting for sure you need a clear sky which mean better planning and luck :D
sample from last 2 nights
1. sample at not so dark or even quite bright area ...
canon 5dm2 +1635L@16mm+168 exp
# Exposure Time (1 / Shutter Speed) = 8/1 second ===> 8 second
# Lens F-Number / F-Stop = 28/10 ===> ƒ/2.8
# ISO Speed Ratings = 400
which I do not have luck
... Time-lapse while waiting for the clear sky ...
or better view @
http://www.liewwkphoto.com/still/Putrajaya/28Nov2010/Putrajaya28112010.htm
2 sample under bit dark area
a. long exposure method
apply with some black card method
5dm2, SIGMA 1224@12mm, tripod, cable release
# Exposure Time (1 / Shutter Speed) = 727/1 second ===> 727 second
# Lens F-Number / F-Stop = 5/1 ===> ƒ/5
# ISO Speed Ratings = 400
images stack method
hope this give some ideas how I shoot stars ..
