On 5/30/2013 4:28 PM, Bruce Walker wrote:
On Thu, May 30, 2013 at 5:11 PM, Walt <[email protected]> wrote:
I watched one of his videos last night and it was a lot better than any of
the others I saw. Obviously, being a Pentaxian has its downsides and this is
one of those cases, since his tutorial was Canon/Nikon-centric (as were all
the others). The one I just started watching demonstrates the difference in
the way Canon and Nikon handle ambient light in combination with flash. But,
based on what I can tell, Pentax apparently uses shutter speed to control
ambient light (like Nikon) while Canon uses exposure compensation.
Out of curiosity, though, would I have to use it in manual mode, or could I
accomplish it in TAv as well?
I've never tried P-TTL with TAv. I have my doubts about how well that
would work. I've mostly stuck to either Av and P-TTL _or_ M and manual
flash. In fact I prefer the latter. The Strobist has a tutorial on
mixing ambient and flash using Av mode. It makes complete sense and
should work well, but it will be like juggling and balancing a
basketball on your head at the same time. :-)
Ha! That's my morning routine before coffee.
The great thing about the shutter speed is (as long as its under your
flash sync speed [160th]) it's decoupled from your flash exposure so,
as Larry said, you can set the ambient exposure via shutter speed and
the flash exposure via aperture. But this is also the bad thing
because now you are controlling two different exposures at the same
time which means measuring two exposures and getting them right. Just
go slow and methodical or you'll go crazy.
I have a feeling it's going to be slow and methodical for a while,
anyway. Though, I have to say I actually like the idea of controlling
two different exposures. There have been times when I've used exposure
to knock down ugly backgrounds at the expense of the subject in the
foreground, and the ability to control both sounds appealing to me, even
if it does require a bit of a juggling and balancing act to get it
right. Between that and getting more familiar with the inverse square
law, I can see where I'll be able to get a lot of shots I would have
foregone (or simply rolled the dice on) in the past.
Oh yeah, all the while this is going on your subject will be standing
there wondering if you're ever going to pay some attention to her. She
may be tapping her foot. Bad sign. :-)
Well, maybe if I offered to make it up to her after the shoot . . . ?
-- Walt
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-bmw
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