Archived from groups: rec.photo.digital (
More info?)
Jim <j.n@nospam.com> wrote:
>"Joseph Meehan" <sligojoe_Spamno@hotmail.com> wrote in message
>> John Bean wrote:
>>>>Why would this be a useful feature to have?
>>>
>>> Exposure compensation to aboid blown highlights for example.
>>
>> Could you not just take one image with the A520 and then delete it if
>> needed?
>>
>The histogram shows how much to change the exposure. What you want are
>values across the entire display.
Not quite. If you shoot a contrastry scene then you will have values
across the display and then you get to choose whether you want to lose
shadows or highlights. If it's a cloudy low-contrast day then you'll
likely see a spike in the middle of the display with little at the
ends.
> And, if you have a spike at the bright
>end, your image may be seriously overexposed. On the other hand, if there
>are no values past the midpoint, for example, your image is underexposed by
>two stops or more.
>
>In addition, with a digital camera, you don't have to wait until the roll
>gets developed to find all this out.
--
Ray Fischer
rfischer@sonic.net