Velocity Reviews > Exposure values

# Exposure values

Don
Guest
Posts: n/a

 08-13-2005
Folks

I understand F stops and their use etc. Can somebody give me an idiots
guide to exposure value. I can extract this figure using my light meter but
am not sure what and how its best used for still photography. Look forward
to all information as always.

--
Don From Down Under

dylan
Guest
Posts: n/a

 08-13-2005

"Don" <(E-Mail Removed)> wrote in message
news:C0jLe.82648\$(E-Mail Removed)...
> Folks
>
> I understand F stops and their use etc. Can somebody give me an idiots
> guide to exposure value. I can extract this figure using my light meter
> but am not sure what and how its best used for still photography. Look
> forward to all information as always.
>
> --
> Don From Down Under
>

to get you started...

http://www.chem.helsinki.fi/~toomas/photo/ev.html
http://www.digicamhelp.com/what-is-e...e-settings.htm
http://www.dpreview.com/learn/?/Glos...xposure_01.htm
http://www.jackspcs.com/evzones.htm

Don Stauffer
Guest
Posts: n/a

 08-13-2005
Don wrote:
> Folks
>
> I understand F stops and their use etc. Can somebody give me an idiots
> guide to exposure value. I can extract this figure using my light meter but
> am not sure what and how its best used for still photography. Look forward
> to all information as always.
>

Essentially, EV is related to the amount of energy striking the focal
plane. The meter reads EV, and you have a choice of shutter speeds and
apertures that give you that exposure. The exposure is proportional to
T/(f/#)squared- T divided by the square of the f/#. That is a bit hard
to figure in your head, so there are circular "slide rules" that do the
computation for you, showing which combinations of shutter speed and
aperture expose properly for the EV for a given film speed. Many light
meters used to have such "slide rules" built onto the meter.

Don
Guest
Posts: n/a

 08-14-2005
Thanks all

regards

Don
"Don Stauffer" <(E-Mail Removed)> wrote in message
news:AGnLe.6\$(E-Mail Removed)...
> Don wrote:
>> Folks
>>
>> I understand F stops and their use etc. Can somebody give me an idiots
>> guide to exposure value. I can extract this figure using my light meter
>> but am not sure what and how its best used for still photography. Look
>> forward to all information as always.
>>

>
>
> Essentially, EV is related to the amount of energy striking the focal
> plane. The meter reads EV, and you have a choice of shutter speeds and
> apertures that give you that exposure. The exposure is proportional to
> T/(f/#)squared- T divided by the square of the f/#. That is a bit hard to
> figure in your head, so there are circular "slide rules" that do the
> computation for you, showing which combinations of shutter speed and
> aperture expose properly for the EV for a given film speed. Many light
> meters used to have such "slide rules" built onto the meter.