350D and 580EX flash problem?

Archived from groups: rec.photo.digital (More info?)

Hi,

Took a picture in P-mode with the flash -> 1/60 s f5.6. Same f5.6 in Av
mode yields 1/6 s shutter speed. What's going on? Am I missing something?

Arttu

Archived from groups: rec.photo.digital (More info?)

So there is no way to benefit from increased sharpness with smaller
apertures (of eg. the kit lens) in flash photography? (exposure times get
too long for handheld operation)

Arttu


"David J. Littleboy" <davidjl@gol.com> wrote in message
newsfrbio$hu7$1@nnrp.gol.com...
>
> "Arttu" <no.email@this.time> wrote:
>>
>> Took a picture in P-mode with the flash -> 1/60 s f5.6. Same f5.6 in Av
>> mode yields 1/6 s shutter speed. What's going on? Am I missing something?
>
> In Av and Tv modes, the camera meters and sets the exposure normally both
> when the flash is up and when it's down. When up, the flash is used to
> fill in the shadows. This is the normal, correct, and desired behavior<g>.
>
> David J. Littleboy
> Tokyo, Japan
>
>

Archived from groups: rec.photo.digital (More info?)

"Arttu" <no.email@this.time> wrote:

> So there is no way to benefit from increased sharpness with smaller
> apertures (of eg. the kit lens) in flash photography? (exposure times get
> too long for handheld operation)

Just shoot in "M" mode and set whatever shutter speed/f stop combination you
like (as long as the flash has enough zorch). That's what people did for the
first 100 years of photography...

Oops, I see you wrote:

>Of course possible in M mode, but I meant in Av.

"M" mode is the correct mode for what you want to do.

The 350D's behavior in Av mode is normal, correct, and desired. It's the way
most automagic cameras have worked in the last few years. When you set the
camera to Av mode, that means "Hey camera, please set the shutter speed
according to the ambient light", so it does. With flash, this means "fill
flash mode". If you don't want the camera to set the correct shutter speed
for fill flash mode photography, then you have to do something different.

(Sorry to sound like a grumpy rant here: I'm just trying to explain what
"Av" means, and point out that what the camera does actually makes sense.)

David J. Littleboy
Tokyo, Japan

Archived from groups: rec.photo.digital (More info?)

Arttu wrote:
> Hi,
>
> Took a picture in P-mode with the flash -> 1/60 s f5.6. Same f5.6 in Av
> mode yields 1/6 s shutter speed. What's going on? Am I missing something?
>
> Arttu
>
>
Custom function 3 can be used to force a 1/200 s flash sync in Av mode.

--
John Reagan

Archived from groups: rec.photo.digital (More info?)

not@real.address (Jim Townsend) wrote:
> David Littleboy answered your question, but if you're interested
> in Canon's flash modes:
>
> http://photonotes.org/articles/eos [...] #confusion

Any URL ending in "confusion" _has_ to be good! I'm off to read.

--
http://08016.com/ - Burlington City history on the internet, since 1995.