True black

[Rafal]

I'm gonna try to explain it best to my abilities When taking a long exposure picture( bulb mode) in low light does the humidity of air affect the blackness of dark areas?
Also, does the pollution make a difference? I haven't had the chance to experiment yet..

 

[tirediron]

Unless you've got so much humidity that you can see it (fog), it should have no effect whatsoever on the image unless it condenses on the lens.

Pollution can be a killer! Climb up to a high point over a large city and look out; you'll see a grey/blue haze which is MURDER on photography.

 

[Rafal]

Unless you've got so much humidity that you can see it (fog), it should have no effect whatsoever on the image unless it condenses on the lens.

Pollution can be a killer! Climb up to a high point over a large city and look out; you'll see a grey/blue haze which is MURDER on photography.

Thanks for the tip. I'm in Chicago and I was wondering why that greyish black appears. I guess the air is not that clean