Reclaimed and Recycled
Its always good to take a test shot at high ISO to get a feel of it.Great info. Tanveer... Thanks for the share. BTW, can you please suggest suitable exposure times for relevant scenes like city nightscapes, star trails (with / without moon etc), traffic trails etc.... I guess I mean to say, how do we decide or predict the suitable exposure time for a shot in Bulb mode... do you have any bench marks or its hit and trials and then learning as you shoot...
there is no exact math.
On a very dark night with light pollution, you need to take minimum 15-20 minutes exposure at ISO 200 F5.6
With moon, even a 4-5 minute exposure at ISO 200 can be enough.;
Even if you take twice the exposure, you still have to recover just one stop!