I do long exposures with digital quite frequently, and have for a few
years now. I don't know about Michael Kenna-style (had to look him
up), as mine are done in the dark of night and I don't know what his
chosen time of day is. I also work in color where he seems to prefer
black & white.
Results seem to vary with the camera manufacturer and model. I use
Canon and most of the complaints and problems I've seen with long
exposures come from Nikon users. They seem to be prone to heating in
the corners referred to as "amp glow." I've never seen it with a Canon.
Digital noise is another issue. Cranking up the ISO will introduce
noise, regardless of length of exposure or camera maker. Therefore I
keep the ISO at 100 and the only time I see any noise is when I
underexpose a frame. There is also some noise in extreme shadow
areas when the lighting is very contrasty, but I think this is
something different than the usual color noise from high ISOs--it's
all white and quite random. I also don't find it very objectionable
as you have to be looking at the picture at the pixel level to see
it. I just ignore it.
Cheers,
Rich
On Nov 19, 2008, at 8:18 AM, lookaround360@xxxxxxxxxxxxxxxxx wrote:
Guys,
I was looking at various high-quality prints recently that ranged from
P&S digital to 8 X 10 sheet film images. Some of the film images were
made with very long exposures - up to 15 minutes! I hadn't given much
thought about long-exposure digital images. But it dawned on me that I
hadn't seen any - at least not any that resembled classic film images.
Could one make, with a digital camera, Michael Kenna-type images where
everything is very sharp except moving objects? In other words - small
aperture, long, long exposure? No doubt something of the sort could be
done as a PS illustration. That's not what I want to do.
The problem is, of course, digital noise. Aside from noise reduction
software is there a digital technique, perhaps used with the better
cameras, that allows noiseless, minutes long, digital exposures?
AZ
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