Anti-flicker not needed for flash?

Started 3 months ago | Questions
tdbmd Contributing Member • Posts: 934
Anti-flicker not needed for flash?

Probably a stupid question but if using an on camera speedlight for indoor group photos under fluorescent lights, there is no need to use the anti-flicker function?

 tdbmd's gear list:tdbmd's gear list
Canon EOS 7D Mark II Canon EOS Rebel T8i (EOS 850D) Canon EOS R6 Canon EF-S 17-55mm f/2.8 IS USM Canon EF-S 24mm F2.8 STM +8 more
ANSWER:
This question has not been answered yet.
tugwilson Veteran Member • Posts: 3,702
Re: Anti-flicker not needed for flash?

tdbmd wrote:

Probably a stupid question but if using an on camera speedlight for indoor group photos under fluorescent lights, there is no need to use the anti-flicker function?

As your shutter speed with be the sync speed or lower it's not going to be an issue.

What may be an issue is the colour of the ambient light.  All fluorescents used to have a very nasty green colour but these days you can get tubes that have warmer light.  If you are able to use a camera setting that nukes the ambient light then you don't have to worry about this. If your speedlight is not powerful enough to overcome the ambient than you may have a problem.

Take a shot with the settings you are going to use without the speedlight but with the colour temperature set to ~550K. If the result is very dark you are OK, if it has a green tint than you need to use a colour correction gel on your flash, if it looks OK then carry on as normal.

OP tdbmd Contributing Member • Posts: 934
Re: Anti-flicker not needed for flash?

Thank you for the tips!

 tdbmd's gear list:tdbmd's gear list
Canon EOS 7D Mark II Canon EOS Rebel T8i (EOS 850D) Canon EOS R6 Canon EF-S 17-55mm f/2.8 IS USM Canon EF-S 24mm F2.8 STM +8 more
Rico Tudor Contributing Member • Posts: 966
Re: Anti-flicker not needed for flash?

if using an on camera speedlight for indoor group photos under fluorescent lights, there is no need to use the anti-flicker function?

It depends on the fluorescent fixture. The common US variety flickers at 120Hz: at exposures near 1/120s, a pronounced color shift is easily observed within the frame. A fancier electronic ballast moves the frequency above 20kHz. The anti-flicker feature of modern cameras really works if you need it, and allows consistent blending of light from electronic flash. You still need to color-match the light by gelling the flash. Note that color temps vary from fixture to fixture even of the same kind, so good luck!

-- hide signature --

Canon, Nikon, Contax RTS, Leica M, Sony, Profoto

GreatWhiteWing Senior Member • Posts: 1,604
Re: Anti-flicker not needed for flash?

tugwilson wrote:

tdbmd wrote:

Probably a stupid question but if using an on camera speedlight for indoor group photos under fluorescent lights, there is no need to use the anti-flicker function?

As your shutter speed with be the sync speed or lower it's not going to be an issue.

What may be an issue is the colour of the ambient light. All fluorescents used to have a very nasty green colour but these days you can get tubes that have warmer light. If you are able to use a camera setting that nukes the ambient light then you don't have to worry about this. If your speedlight is not powerful enough to overcome the ambient than you may have a problem.

Take a shot with the settings you are going to use without the speedlight but with the colour temperature set to ~550K. If the result is very dark you are OK, if it has a green tint than you need to use a colour correction gel on your flash, if it looks OK then carry on as normal.

I hope not to derail this thread but if you set ambient exposure to near dark and use 99 strobe for illumination should the anti-flicker be used?

I am guessing no, does it have any effect at all?

 GreatWhiteWing's gear list:GreatWhiteWing's gear list
Canon EOS 5D Mark IV Canon EF 24-70mm F4L IS USM Canon EF 16-35mm F4L IS USM Tamron SP 70-200 F2.8 G2 +2 more
tugwilson Veteran Member • Posts: 3,702
Re: Anti-flicker not needed for flash?

GreatWhiteWing wrote:

tugwilson wrote:

tdbmd wrote:

Probably a stupid question but if using an on camera speedlight for indoor group photos under fluorescent lights, there is no need to use the anti-flicker function?

As your shutter speed with be the sync speed or lower it's not going to be an issue.

What may be an issue is the colour of the ambient light. All fluorescents used to have a very nasty green colour but these days you can get tubes that have warmer light. If you are able to use a camera setting that nukes the ambient light then you don't have to worry about this. If your speedlight is not powerful enough to overcome the ambient than you may have a problem.

Take a shot with the settings you are going to use without the speedlight but with the colour temperature set to ~550K. If the result is very dark you are OK, if it has a green tint than you need to use a colour correction gel on your flash, if it looks OK then carry on as normal.

I hope not to derail this thread but if you set ambient exposure to near dark and use 99 strobe for illumination should the anti-flicker be used?

I am guessing no, does it have any effect at all?

You've contributed to not derailed this thread.

If the ambient has minimal contribution to the exposure it doesn't matter what it's doing.

rumple
rumple Senior Member • Posts: 1,814
Re: Anti-flicker not needed for flash?

tdbmd wrote:

Probably a stupid question

Not so much

but if using an on camera speedlight for indoor group photos under fluorescent lights, there is no need to use the anti-flicker function?

If ambient is part of the exposure, yes.  If you're killing the ambient entirely, no.

Having said all of that, I don't think there is a downside to turning the flicker detection / avoidance on.

-- hide signature --

"THINK" - Watson

Keyboard shortcuts:
FForum MMy threads