Flash verses contuinuous lighting
Mar 4, 2012 13:38:08 #
On your camera are the settings the same like iso, shutter speed, and F stop. When using flash verses coutinuous lighting. I can't seem to get it in my head that thay would be the same. I would think so ?
Mar 4, 2012 14:54:47 #
Lockdown, If you have relative fancy DSLR, than you should have two EV settings one for your normal exposure and the other that controls you flash power. The flash power control (EV) actually controls how much power you will allow flash to be increase or decrease by for a given situation. I hope this answers your question? Arnold
lockdown wrote:
On your camera are the settings the same like iso, shutter speed, and F stop. When using flash verses coutinuous lighting. I can't seem to get it in my head that thay would be the same. I would think so ?
Mar 4, 2012 15:45:42 #
Adubin wrote:
Lockdown, If you have relative fancy DSLR, than yo... (show quote)
Flash and continuous lighting are the same...sort of.
When using flash vs ambient though, they are treated differently.
For example; the duration of flash is very quick...something on the order of 1/20000 of a second.
So...knowing that..you can understand that your shutter speed really has no affect on how much flash appears in your shot...but it DOES affect the amount of continuous light.
The aperture affects both.
You should treat flash shots as "two different shots" the ambient shot and the flash shot.
does that make sense?
Mar 5, 2012 01:15:46 #
Mar 5, 2012 01:20:50 #
Thank you, It's all making more sence now, I own a Nikon D80. I'm now getting into flash and have used it alot. It takes great pic and was just needing to understand it alittle better. I can always count on Ugle Hedgehog to help. Thanks
Mar 5, 2012 05:35:51 #
lockdown wrote:
Thank you, It's all making more sence now, I own a Nikon D80. I'm now getting into flash and have used it alot. It takes great pic and was just needing to understand it alittle better. I can always count on Ugle Hedgehog to help. Thanks
No problem...
I'd HIGHLY recommend you check out the strobist.
www.strobist.blogspot.com
Go through the "Lighting 101" course...
This is the best resource on flash use and lighting using speedlights
on the internet today...it really is.
Mar 5, 2012 12:50:49 #
lockdown wrote:
On your camera are the settings the same like iso, shutter speed, and F stop. When using flash verses coutinuous lighting. I can't seem to get it in my head that thay would be the same. I would think so ?
I keep 1/200, f/5.6 in my full manual settings as a general rule. When I walk into a flash situation I switch to full manual, pop the flash and generally come up with pretty good results.
Continuous lighting, depending on how much there is, can give you the option of higher shutter speeds or perhaps a higher f/stop which with increase your sharpness.
One good way is to meter the setting. All I do for metering is set the camera to program, do a half press on my subject and check what the camera thinks the settings should be and go from there.
I've found that my t1i is accurate on settings virtually every time so I rely on it a lot for continuous / available light settings.
Good Luck
Mar 6, 2012 02:05:23 #
Thanks. Ok this is what I'm trying to really understand. Lets say you have two pictures that look excactly the same. One taken in flash and one in contuinuous lighting. Would the shutter speed be the same for both pictures
Mar 6, 2012 02:39:11 #
lockdown wrote:
Thanks. Ok this is what I'm trying to really understand. Lets say you have two pictures that look excactly the same. One taken in flash and one in contuinuous lighting. Would the shutter speed be the same for both pictures
Well they wouldn't look the same becase flash can be very harsh and normally continuous lighting is much softer. But I'd say yes, or at least very close. If the camera sees the same light yes.
But that's still difficult to predict because the flash isn't on when you focus and expose so the camera has to know, from firmware, given the distance to the subject, what the settings should be when the subject is lit with flash.
It gets kind of complicated to predict what a given situation will give you.
Jim
Mar 6, 2012 04:45:49 #
lockdown wrote:
Thanks. Ok this is what I'm trying to really understand. Lets say you have two pictures that look excactly the same. One taken in flash and one in contuinuous lighting. Would the shutter speed be the same for both pictures
They could.
Light is light and you could set the shutter speed the same on both; the flash picture and the natural light picture.
The crux of this whole conversation comes down to this:
When using flash, you are actually MAKING TWO DIFFERENT EXPOSURES....
You have to treat your shot as two different exposures.....right?
Exposure #1: Ambient light
Exposure #2: Flash
They are separate, treat them separate. I know that sounds weird but it's true.
Here is a good article about how to bounce flash to it looks natural and it will illustrate what I'm saying:
http://neilvn.com/tangents/flash-photography-techniques/4-bouncing-flash/
Mar 6, 2012 12:32:35 #
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