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Re: Forked tongue advice...
In reply to Billx08,
6 months ago
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Billx08 wrote:
Mark H wrote:
Billx08 wrote:
carsonbm wrote:
What is the fastest shutter speed that can be used with the flash?
Using Shutter Priority and Manual shooting modes, 1/4000th sec. In Aperture Priority and Program mode, the X10's shutter speed never gets very fast, preferring values between 1/30th and 1/250th sec. even if it means gross overexposure. I guess that it can't handle close subject distances using the flash very well in those shooting modes, and dialing in -EC on the flash doesn't help very much, so Shutter Priority is probably the one you'd usually want to use for short distance shooting.
Bad advice - 'Shutter Priority' really won't help flash exposure.
As a rule, you cannot control flash exposure using shutter speed - especially not at 'short distances' where the flash power/duration can easily be even shorter than 1/4000s.
As a general rule, that's true, but the alternatives produce photos using shutter speeds down to 1/30th sec., and so it's a tradeoff between gross background overexposure vs. underexposure. But if the flash duration is less than 1/4000s, it's at a considerably reduced power, which shows that it did have an effect on flash exposure.
In mixed light i.e. 'ambient + flash', the shutter speed will only affect the ambient light component of the exposure - whereas the aperture (and ISO) value(s) affects both the flash and the ambient exposure components.
To see what I'd get with the X10 with a subject about 3 ft. from the camera and several background objects another foot or two farther from the camera, using ISO 100, Aperture priority at f/11 chose 1/60th sec. and Shutter priority at 1/1000th sec. chose f/2.8. Both images showed similar exposures and histograms in playback. The only problem was that the A priority photo used much more battery power for its very high flash output, and the S priority photo obviously not only used much less battery power for the flash, it also used a much higher shutter speed, which after all was what the OP was interested in. If you check, you'll see that all that he asked was :
What is the fastest shutter speed that can be used with the flash?
I've noticed that when you try to help, it often doesn't help with the original question. Instead, it usually seems intended to help you to further your agendas.
See, you've actually learnt something - that you can shoot flash exposures at close distance, potentially with either exposure priority mode, and without "gross over-exposure" (subject to settings and limitations).
Re: If the flash duration is less than 1/4000s, then of course it is at reduced power - but that is not anything to do with the shutter speed setting - the flash power is calculated as function of the subject distance, aperture and ISO values - not shutter speed.
Re: Your being so concerned about departing from the OP's original question - then why did you post such a rambling/garbled response to him yourself, re 'close distances', '-EC flash compensation', and different 'exposure modes'?
I already responded to the OP directly, elsewhere - above, I was responding to you, and the bad advice, that you had offered up...
I.e. Quote: "I guess that it can't handle close subject distances using the flash very well in those shooting modes, and dialing in -EC on the flash doesn't help very much, so Shutter Priority is probably the one you'd usually want to use for short distance shooting"
...which was not only poor advice, but poor advice that also, to paraphrase your own typically hypocritical words... 'If you check, you'll see that the OP hadn't actually even asked for'.
Re: quote,"agendas" - if contesting/correcting such completely erroneous advice (as your suggesting 'Shutter Priority, to work better than -EC flash compensation') is somehow having an 'agenda' - then if you choose to see it that way, then tough, you had probably better get used to it.
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