Yongnuo YN-622C Controller Trigger

thegreekM3 wrote in post #15225335

Hosted photo: posted by thegreekM3 in
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forum: Flash and Studio Lighting

This is +2/3 FEC

Hosted photo: posted by thegreekM3 in
./showthread.php?p=152​25335&i=i147549628
forum: Flash and Studio Lighting

this is 0 FEC
The only thing i changed is the flash metering mode (average) and Manual Exposure.Of the two which one you think is the correct exposure.Do you guys think that the metering is correct ,do I need to change any settings?
Is this what I should expect from ETTL?

TIA

I think these look about right for ETTL, and that the +2/3 shot might look a little better exposure-wise (+1/3 might be just about perfect). With ETTL metering using average you'll generally get a stronger flash than with evaluative. For that reason, I generally use ETTL/evaluative for fill. With average there may be a little more chance that a large dark or bright area in the scene will throw the flash exposure off, just as with the camera's metering.

btmlinedan wrote in post #15225723
Looks about right. ETTL doesn't always know what you want so you gotta help it out a bit. Were you shooting through a diffuser?

Yes soft box with 1 layer of diffusion.

stsva wrote in post #15225770
I think these look about right for ETTL, and that the +2/3 shot might look a little better exposure-wise (+1/3 might be just about perfect). With ETTL metering using average you'll generally get a stronger flash than with evaluative. For that reason, I generally use ETTL/evaluative for fill. With average there may be a little more chance that a large dark or bright area in the scene will throw the flash exposure off, just as with the camera's metering.

I was getting underexposed ones with evaluative.Check the previous that i posted.These look better I guess.Can you tell why the previous were underexposed?

thegreekM3 wrote in post #15225794
I was getting underexposed ones with evaluative.Check the previous that i posted.These look better I guess.Can you tell why the previous were underexposed?

As I noted, if shot in ETTL/evaluative you'll get a "softer" exposure than if shot in ETTL/average. Did you shoot the first set in evaluative or average?

stsva wrote in post #15225831
As I noted, if shot in ETTL/evaluative you'll get a "softer" exposure than if shot in ETTL/average. Did you shoot the first set in evaluative or average?

The first was in evaluative.I prefer the second set.The question is that if I am doing something wrong and I need +FEC.I have read that this is regular behaviour with Canon ETTL II when using modifiers or bounce.Can i do something to get better exposures?

thegreekM3 wrote in post #15225861
The first was in evaluative.I prefer the second set.The question is that if I am doing something wrong and I need +FEC.I have read that this is regular behaviour with Canon ETTL II when using modifiers or bounce.Can i do something to get better exposures?

If you want perfect, non-changing exposures, you will need to use a flash meter and set your flash power manually. ETTL II works very well, but it still is evaluating the scene and calculating an exposure. Like your camera's metering system, it can be fooled and it doesn't always get things "right," plus it doesn't know how you want the subject/scene to look. The "perfect" exposure you envision may not be the "perfect" exposure for the scene in terms of the camera/flash metering programming. When using ETTL, FEC is part of the game to fine tune the exposure. Although modifiers will cut down on the amount of light reaching the subject, ETTL will take that into account through evaluation of the pre-flash. What you're experience is basically what ETTL is programmed to do.

stsva wrote in post #15225940
If you want perfect, non-changing exposures, you will need to use a flash meter and set your flash power manually. ETTL II works very well, but it still is evaluating the scene and calculating an exposure. Like your camera's metering system, it can be fooled and it doesn't always get things "right," plus it doesn't know how you want the subject/scene to look. The "perfect" exposure you envision may not be the "perfect" exposure for the scene in terms of the camera/flash metering programming. When using ETTL, FEC is part of the game to fine tune the exposure. Although modifiers will cut down on the amount of light reaching the subject, ETTL will take that into account through evaluation of the pre-flash. What you're experience is basically what ETTL is programmed to do.

Yes I understand manual flash is more consistent,but kids are moving and i invested some money to get decent exposures of my kid .I guess FEC is the only way right now.

thegreekM3 wrote in post #15226002
Yes I understand manual flash is more consistent,but kids are moving and i invested some money to get decent exposures of my kid .I guess FEC is the only way right now.

Yeah, for moving subjects ETTL + FEC as needed is the way to go.

iituner. Thanks for the info.

thegreekM3 wrote in post #15225794
I was getting underexposed ones with evaluative.Check the previous that i posted.These look better I guess.Can you tell why the previous were underexposed?

The previous photos were shot with the ISO at 100...The second set was shot with the ISO at 400...

Guys, I need help!

I have a 5D mark ii a 430exii and a pair of YN622c triggers.

I put the trigger on the 5d mark ii, I put the other trigger on the flash unit and put that on a light stand.

I put the flash behind an umbrella.

Settings on camera: I went to flash control, external flash, and set it to ETTLii.

I then went to the flash unit and set that on ETTL setting (not manual).

I turn on both trigger systems... I fire a shot, it's always the same exposure, no matter the ambience in the room (Super bright, full power it looks like).

What am I doing wrong?

reicaden wrote in post #15227268
I have a 5D mark ii a 430exii and a pair of YN622c triggers.
...
I fire a shot, it's always the same exposure, no matter the ambience in the room (Super bright, full power it looks like).

That is usually due to poor contact between hot-shoe and hot-foot. Clean the contacts and make sure that each foot is fully seated and locked down.

Don't make settings on the flash - just use the menus.

Except to do this test. Take the 430EXII off the 622 and set it to Manual.
Place back on 622, and power them up. On camera menus, set E-TTL. Half-shutter and release, The flash should now show E-TTL mode.

CliveyBoy wrote in post #15227340
That is usually due to poor contact between hot-shoe and hot-foot. Clean the contacts and make sure that each foot is fully seated and locked down.

Don't make settings on the flash - just use the menus.

Except to do this test. Take the 430EXII off the 622 and set it to Manual.
Place back on 622, and power them up. On camera menus, set E-TTL. Half-shutter and release, The flash should now show E-TTL mode.

Hi Clive,

I'm still working on my 7D and EXii speedlites, but also trying to get my head around why the 5Dii works differently. Is it because the circuitry is different from the 7D, because with that and an EXii, the speedlite would be on ETTL and the camera on Manual .... I think that's right.

Malcolm

thegreekM3 wrote in post #15225335
The only thing i changed is the flash metering mode (average) and Manual Exposure.Of the two which one you think is the correct exposure.Do you guys think that the metering is correct ,do I need to change any settings?
Is this what I should expect from ETTL?

Use Average if the flash is on a film camera -its not equiped for multi-zone evaluations.

I find the two images a little puzzling, (assuming that exposure has not been altered in Lightroom).

Image 1: M 1/40S f3.2 ISO400 EC disabled FEC+2/3
Image 2: M 1/40S f3.2 ISO400 EC disabled FEC+0

Those settings would normally provide considerable ambient. But here the background changes with the FEC. If the background is lit mainly by the flash, with little fall-off, the flash is in a shoot-through umbrella and is well back, and is providing most of the light. That demands a lot of power from the flash, perhaps more than it can give.

The camera tries to produce an 18% grey tone over all as a "normal" exposure. The photog assesses the lighting and reflectance,and uses EC and FEC to adjust. It is a required skill for flash and non-flash exposures.

Try the flash about 3 feet from the subject's head.

Alexam wrote in post #15227414
trying to get my head around why the 5Dii works differently. Is it because the circuitry is different from the 7D, because with that and an EXii, the speedlite would be on ETTL and the camera on Manual

Part of the answer lies in the different settings and custom functions that have been set within the camera, even with two of the same model.

With the test I suggested to Alexam, it was designed to get him to rely on the flash control menus, and to establish that correct communication had been established. Camera exposure settings are irrelevant for this.

For normal shooting with flash, I would suggest the camera mode be Manual, and the Flash mode set by camera menu be E-TTL for action situations and Manual for controllable ones. Regardless of body used.