This is an unexpected surprise to me concerning the EOS 5D Classic - even though the ISO only goes to an unimpressive 3200, using the "extended" setting (all new DSLR's can now reach at least 12,800, with premium models going as high as 102,800, which is 5X better than the 8 year old 5D Classic), I was amazed to find how exceptionally absent the noise is with this older camera.
I took both of these pictures last night with the ISO set at 1600 in a very dimly lit room, and just to get any kind of realistic shutter speed (which ended up at an insane 1/4 sec) I had to apply an exposure compensation of -2 EV. The lens I was using was my 28-105 zoom, set at around 35mm, and so my Aperture was "wide open" at f4. So, in every respect, we're "way down there" - I've never had a full frame DSLR before, and I just surrendered an almost new Rebel T3i (APS-C 23mm size frame, 18 Megapixels) to buy this 8 year old 5D (Full Frame 35mm size, 12 Megapixels). Cost wise, it ended up being close to an even swap for me, although to get the 5D, I had to put out some extra cash to buy two lenses, pay for delivery, and some unique accessories.
I thought these shots would be hopeless - with four things working against me:
- Hand-holding a 1/4 sec shutter speed with no Image Stabilization
- -2 EV - you "never do this with a digital camera", as you're shooting way down in the less-significant data
- Wide open Aperture contributes softness to image
- Using camera's next to very fastest ISO is bound to make a lot of noise / speckle
- Dim ambient light with no AF Assist would normally result in extreme difficulty focussing