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Re: camera advice

  • Subject: [iris-photos] Re: camera advice
  • From: "irischap" <irischapman@netscape.net>
  • Date: Mon, 15 Apr 2002 17:39:07 -0000

> > This is the blind leading the blind, but with my cheapo digital 
> > to keep it from overexposing light colored irises, I put a sheet 
> > white poster board (leaning it against an upside down plastic 
trash can)
> > as a backdrop.  That way the dumber than me camera can tell that 
> > yellow isn't as white as the backdrop & it seems to figure out 
what to
> > do about it.  I haven't a clue how it knows, but it seems to work.
> >
> > Linda Mann
> >

The camera is metering off general background, which it tries to make 
a neutral grey ( refered to as a 17% grey). There are several 
solutions, the white background can work in some situations. 
1) Find out from your manuel how to change the metering to center 
weighted metering. This will let it set exposure according to what is 
in the center of the lens. 
2) Set exposure using a neutral colour. This can be done by pointing 
the camera at a neutral grey card, back of your hand (works for me), 
a cut out picture, or other neutral shaded object at the same 
distance from the lens. Wth most cameras if you half push the shutter 
the camera will lock in the exposure, then you point the camera back 
at your subject and "click"
3) A lot of cameras have an exposure adjustment. Check your manuel 
and then set the exposure for about -1 setting. This will make your 
photo darker , but the flower will be correctly exposed. It may need 
more or less then -1, you'll have to experiment.
4) White balance is a setting available on some digital cameras. Try 
your menu button and see if anything seem similar. 

Check camera manuel for further help. There are a lot of adjustments 
that can be made. I just about have all the buttons and adjustments 
figured out for my camera.

Chuck Chapman, Guelph, Ontario, Canada. Reticulata in bloom about a 
week ago, still here.

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