Road Train !!!!!!!!!!

by Russell McMahon

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2
votes
3answers
212 views

If TTL only preflashes once, how does it get correct exposure immediately after?

If I understood TTL correctly, say you are in M mode with a camera and you have intentionally underexposed. The flash in TTL mode theoretically would try to add enough light to correctly expose the ...
8
votes
5answers
255 views

How does TTL flash work when there are multiple flashes?

I've been watching a lot of deconstructing videos on how the light is setup. Often times there are 2-3 flashes at the studio. The photographer will say that they are all set to TTL. But how does that ...
2
votes
1answer
142 views

What flash guide number do I need to underexpose a “sunny” background?

I'm familiar with the maths behind flash usage (guide numbers, etc.). Here's a more practical question that doesn't yet seem to have an answer on photo.se: Consider a subject, outdoors, on a regular ...
2
votes
4answers
150 views

Is this statement By Jim Zuckerman incorrect?

"For the exposure of the foreground, though, the lighting came from the flash only. Therefore, changing the shutter speed didn’t affect the exposure of the subject, since the speed of light is faster ...
1
vote
2answers
138 views

My D3100 takes longer exposure shots instead of using the flash

Both the camera and the Flash are in AUTO, so in low light it should make the flash pop up, but it does not. Instead it just seems to take a shot with longer exposure, making the photo appear with ...
1
vote
2answers
577 views

Overexposed images when using ring flash

I am somewhat of a newbee to photography, but I have a Sigma EM-140 Ring Flash with a 18-250mm Sigma lens. In short, when I use the camera with the ring flash I can't get it to take photos that ...
4
votes
2answers
141 views

Does a flash's TTL automatically adjust as I change its location?

I just bought a radio trigger for my flash. I was just wondering if I understood TTL correctly, as I move the flash around and changes the distance does TTL automatically try to compensate (assuming ...
4
votes
3answers
884 views

How do TTL flash metering systems calculate how much power is needed?

Does anyone know how TTL calculates the amount of power to put in after the preflash is done? I understand that the value is somewhat brand specific, but what is the general logic? Because if you ...
0
votes
0answers
59 views

Why does my flash have lower power in automatic than in manual? [duplicate]

I have a Sony HVL-43AM flash. I've found that when I'm in automatic mode, when I dial the flash exposure compensation to -2EV I was able to get a much weaker flash than if I went manual with the flash ...
1
vote
5answers
278 views

What exactly does TTL flash sets its power to?

I understand that TTL flash means the flash will preflash and try to calculate the right exposure for that particular scene. That part makes sense, but what exactly is the "right exposure"? Does it ...
1
vote
7answers
2k views

What could cause severe under-exposure when using a Canon 5D Mark III with Speedlite 600EX-RT with Evaluative E-TTL2 metering?

I recently purchased a Speedlite 600EX-RT for use with my 5D Mark III. I'm shooting with a 17-40 f4/L lens. Particularly when using the flash in the standard forward position, I get extremely severe ...
2
votes
1answer
110 views

Synchronization problems with Rekam NEO 200 and Canon 600D

I've recently got two Rekam NEO 200 lamps with synchronization cable. To connect them to my canon 600D i've bougth an adapter. The flash seems to sync correctly when setting exposition to values ...
1
vote
1answer
472 views

Why would I use FEB (Flash Exposure Bracketing)?

In what situation would using FEB (Flash Exposure Bracketing) be a good idea? Exposure bracketing can be blended together with HDR, but why would I use FEB?
5
votes
2answers
511 views

Should my Nikon D3100 adjust settings to allow for use of flash in AP or SP mode

When I'm shooting with the onboard flash in low light conditions, I observe the exposure preview settings between no flash and the flash popped up - there appears to be little or no difference between ...
1
vote
1answer
221 views

Skin tones become yellower/ oranger when flash is on

When I take pictures of people, the yellow and red tones seem to be enhanced and the result is a more jaundiced complexion in best case scenario and orange and a bit shiny if their skin is a bit oily. ...
6
votes
2answers
1k views

Pentax P-TTL: Why and when does underexposure occur and what can I do?

Pentax's P-TTL flash metering system tends to be unreliable and may underexpose at times. When and why does the system underexpose and what can I do? I want to know the situations that cause flash ...
2
votes
4answers
1k views

How do I prevent the background from going dark when using the flash with a subject?

This is with Flash, short shutter exposure time, and zoomed in This is without Flash but with long shutter exposure time when using the Flash the background tends to get dark and the subject ...
7
votes
4answers
7k views

How does TTL flash work in manual exposure mode?

I got the Metz 44 AF-1 flash recently that is TTL capable for my Canon 550D, and have been reading around to get a better understanding of using flash on-camera (Neil Van Niekerk's article on flash ...
4
votes
3answers
606 views

Why are there multiple contradictory ways to control flash ratio?

I am reading the following introduction to flash photography: http://www.cambridgeincolour.com/tutorials/camera-flash-2.htm In this article, I came across two seemingly contradictory statements: ...
14
votes
2answers
1k views

How can I think logically about getting correct exposure with flash?

I recently got a new off-camera flash (Nikon SB-700), and I'm having trouble thinking about the variables that go into proper exposure. For example, without flash, I have a little mental decision ...
4
votes
4answers
2k views

Why does my Canon 60D sometimes lengthen exposure when using the flash?

In low light conditions, my first shot will often be handheld with no flash. If there's not enough light however, the shutter speed can be too slow and I'm not steady enough for a crisp image - so ...
12
votes
9answers
5k views

How do I take a portrait at night with detail in the background instead of just blackness?

I was trying to make a photo of my girlfriend around 9 pm with a D7000, Sigma 24-70 2.8, and SB-900. She was in the center of the frame, taking up about 20% of the frame. About 40% was taken up by ...
10
votes
2answers
417 views

Why does exposure compensation have no effect with my hotshoe flash?

Taking photos with my Canon XTi and 550ex. Camera exposure compensation did not seem to effect the exposures. I figured out I needed to use the on-flash exposure comp. But the flash output is ...
17
votes
3answers
8k views

How do I predict exposure when using flash?

So I've got the basics down for the exposure triangle, but sometimes you just need to add more light to the room and the flash can be the most convenient way of doing that. The problem is that the ...
8
votes
2answers
2k views

Creating silhouettes in a studio environment

The trick to creating silhouettes in the field, as far as I know, is to use spot-metering and to expose for the background. However, this is a bit more difficult in a studio environment. What is the ...
10
votes
3answers
2k views

What is sync speed?

When referring to flash exposure, what does "max sync speed" mean?