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|  » Stats |
Members: 50,176
Threads: 82,394
Posts: 853,594
Top Poster: glsammy (15,069)
| | Welcome to our newest member, Songbirdsteve | |  | | 
17-12-2010, 09:55 AM
| | Commander of the Wild Empire | | Join Date: Jul 2008 Location: Watford, Hertfordshire.
Posts: 4,868
| | | Re: Exposure setting confusion
Check the histogram and ensure it's as far to the right as possible, without touching the end (and thus blowing the highlights). Modify this if there are specular highlights, such as sparkle on water. These are never going to get correct exposure without 'blocking' up all the rest of the image - so just let them 'blow'!
The reason for exposing to the right?
Half the image data is captured in the brightest stop. The next brightest stop captures half the remainder - and so on down to the darkest stop, which captures very little data. This means that if you underexpose by just one stop, you miss half the available data for the image (and two stops, three quarters of the data!). The effect of this may be shown as 'posterisation' in the shadows - where there is not enough data to show continuous tones.
Jim |
17-12-2010, 06:13 PM
|  | Wild Member | | Join Date: Dec 2010 Location: North Devon
Posts: 113
| | | Re: Exposure setting confusion
I think my next steps would be to.
a) reset all the cameras settings to default.
b) shoot a field of grass, fill the frame with the stuff (or something else with a neutral tone, grey card if possible) and see how that comes up.
If your still getting iffly looking exposures then perhaps the camera needs looking at.
Random thought, were you using a hood on your lens then and not now, I have seen large differences in contrast occasionally when I have forgotten a hood? just a thought.
Stephen |
21-12-2010, 06:13 AM
|  | Commander of the Wild Empire | | Join Date: May 2009
Posts: 1,546
| | | Re: Exposure setting confusion
Stephen I lost my hood I think you might have nailed it. Thanks a million mate and to all that responded. Ill get a new hood and see if that does the trick. Great stuff folks. |
29-12-2010, 06:22 PM
| | Wild Member | | Join Date: Dec 2010 Location: North Devon
Posts: 113
| | | Re: Exposure setting confusion
Be interested to know if that was the answer, great if it is 
Stephen |
29-12-2010, 07:04 PM
| | Commander of the Wild Empire | | Join Date: Jul 2008 Location: Watford, Hertfordshire.
Posts: 4,868
| | | Re: Exposure setting confusion
Quote:
Originally Posted by FUDGEY  Stephen I lost my hood I think you might have nailed it. Thanks a million mate and to all that responded. Ill get a new hood and see if that does the trick. Great stuff folks. | This might temporarily help: Free printable cardboard lens hoods
Jim |
30-12-2010, 12:17 AM
| | Wild Member | | Join Date: Dec 2010 Location: North Devon
Posts: 113
| | | Re: Exposure setting confusion
Quote:
Originally Posted by Jim Ford | Well I never, what a great link and bookmarked in an instant.
Thanks
Stephen |
31-12-2010, 07:44 PM
|  | Commander of the Wild Empire | | Join Date: Jun 2007 Location: Lancashire
Posts: 3,329
| | | Re: Exposure setting confusion
Quote:
Originally Posted by Stephen Raff Well I never, what a great link and bookmarked in an instant.
Thanks
Stephen | Me too. Well nifty!
Happy New Year, Chris |
08-01-2011, 02:57 PM
|  | Commander of the Wild Empire | | Join Date: Sep 2008 Location: knowle, solihull (just south of b'ham)
Posts: 2,830
| | | Re: Exposure setting confusion
Haha! there is a printable hood for the canon 600mm f/4L IS  .
Has to be printed on A2 paper! | | | |
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