Re: Trouble getting decent digital pics

From: Gordon Couger (gcougerTakeThisOut_at_couger.com)
Date: 02/21/05 

Date: Mon, 21 Feb 2005 14:58:50 -0600

Joe Hope wrote:
> Thank you so much Aaron and Gregor.
>
> Your suggestions were really most helpful and I am now getting much
> better images, if not quite as nice as I would really like. At least
> now I have more realsitic expectations of what can easily be achieved.
> For instance, I know that the 'ring artefacts' aren't just a result of
> my own incompetance!
>
> There is one phenomenon I experience that I don't think I've seen
> described elsewhere however, and I wonder if anyone else knows
> anything about it...
>
> Usually I set everything up so that the light levels are rather high
> so the exposure will be fast. Even so, I use a delayed exposure.
> Usually, the image on the monitor of the Coolpix looks quite sharp at
> this stage, but when the image is actually captured it is almost
> invariably disappointingly softer or fuzzier than the preview image.
> It is generally usable, but I am left thinking "if only the camera
> took what I was seeing on the monitor BEFORE it took the picture".
>
> Probably I am exhibiting some confused thinking here -- if anyone can
> put me in the picture I'd be grateful.

Hi Joe,

Some of that comes from the image processing that done by camera
you can't turn it off unless you install the firmware that lest
you capture a raw image and have the software to assemble it
into to something like bitmap or TIFF that you can working with
out loss of data from the image.

The only sure test I know for it is to capture a raw image or
put a 950 or 990 CoolPix beside it and take two identical images.

Gordon
Gordon Couger

I collect links on information related to light microscopes.
www.couger.com/microscope/links/gclinks.html
Please forward anything you think might be useful to others.
Microscope Documentation is at www.science-info.org

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