On 29/06/2011 18:16, Paul Furman wrote:
Stewart Robert Hinsley wrote:
philo writes
Allen wrote:
Interesting--but at what cost of resources?

http://www.pcworld.com/article/23086...l_wbx_h_crawl1

or Tinyurl:

http://preview.tinyurl.com/3o6t33t

I saw that and posted the info on alt.photography

Ah, I didn't click to the article though, very interesting.

there were a few skeptics there...but personally I find it rather
amazing.

If it comes out at an affordable price and the reviews are good...
I'd consider getting one

I share the suspicion that raw images are going to be memory hogs. The
system would, I think, eliminate autofocus lag, at the cost of greater
time spent processing the image after exposure.

It seems to me that it moves the cost of the system from the glass to
the sensor (and the processor).

However, while the PC World article talks about refocusing the image,
one of the applications described in the associated Ph.D. thesis is an
extended depth of field. While I see why this might not be desired in,
for example, portrait shots, it would come in handy for closeups of
flowers and insects, especially if wanted for technical illustration,
rather than artistic purposes.

Something else that I wonder whether this can supply - one can sort of
get away with photographing through fences when the fences are greatly
out of focus - but could this throw away the light from the fence so you
have a photograph which is if the fence wasn't there?

Extended DOF may or may not be unique, you can always stop down and
generally pay a price with diffraction, a longer exposure and/or more
noise but the selective focus is very interesting. Perhaps the design
solves the light loss associated with stopping down too but I doubt that.

That is in a real sense exactly what it solves. The coded mask trick
allows you make a pseudo "pinhole" that lets a lot more light through.
The price is a lot of computation to get from the raw data to a usable
image. And introduction to the basics is online at:

http://www.paulcarlisle.net/old/codedaperture.html

I don't know what family of MURA Lytron are using.

Regards,
Martin Brown