Redness vs aperature in photography?
Have recently been experimenting with night time photography with long exposures (around 30 second shutter speed). Have found if i have the aperature set to F2, the photograph produced is vibrant and colourful! However, if the aperature is set to F16, the image is darker and red! I understand that F16 has a smaller iris/aperture, so less light gets to the sensor, making it darker, but why the redness? Is this something to do with light bending like redshift??????
at F2.8 you are letting in 16 times more light then at F16, so hence the manmade amber light is being picked up alot more at F2.8 than at F16
the light is "spilling" onto the black (or where it should be black)..........
what iso are you using??? without that no more geussing from me....
i find 100iso F8 - F16 handles most 30sec exposures around manmade ambient light/ night shots - without a lot of red/orange spill
EDIT: i agree with Zanas sypnosis also, mostly i use transparencies for long exposures as i prefer reproprosity failure and the characteristics of transparency in long exposures (no noise etc)
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