D300s, Long exposure noise reduction

[Jakov Minić]

Robert. this is very nice. i like how the stars look like comets with their tails.

[Seapy]

Thank you Jakov, the tails are an option of the StarTraX software, I felt they added a novel dimension to the otherwise geometric image.

[Erik Lund]

You have captured a UFO

I also like the comet shaped stars!

[Patrick Berg-Pedersen]

With an exposure times as "short" as 10 seconds you surely can (and absolutely if the temperature outside is low enough) try to use a D300 with LENR off, but when the exposure time extracts to minutes, not a photo program on earth are able to do what the LENR on would manage. So as a wise man once said to me, the LENR should ALWAYS be on on exposures longer than a minute.

[Marco Lanciani]

Is it worth it to take some dark frames before and after the "light" sequence, to have a better "map" of hot pixels and noise, or only after the light sequence is the right way to go?

Yet, I do noticed a difference in time on long exposures on my D7000. Usually when I need long exposures on intervals, I use the Promote Control: if I set 30" I get 32". If I set more, it's proportional. I thought it was the Promote Control... until I read this thread. I still have to check with the camera alone.