11-11-2012 02:15 PM
11-11-2012 02:33 PM
I use my 580 in AV mode a lot. What are the settings and the situation you are trying to use it in?
11-11-2012 04:35 PM
I am using two 580s.
The one on camera is set as master. Both same channel.
I set the apparture high so I would think sync speed should not be a problem but then let me rechech and will post more info with this in consideration.
My main reason to use on AV is to have a better DOF as set on Auto, Flash TTL everthing works well but very shallow deepth due to mostly chosen highest F stop.
11-11-2012 08:56 PM
should work - we shoot AV often - high f should cause lower shutter speed - no high speed sync needed unless you are in blazing sun.
One thing to realize is that in most all shooting modes (AV, TV, etc) Canon wants to do fill flash - i.e., the camera tries to set the exposure so that the background is correct and uses flash to fill-in. Thus, problems can occur in dark conditions where setting a high f would not be possible (shutter speed cannot go low enough to compensate for the narrow aperture) for correct background exposure. You can over-ride this with manual settings, but will probably end up with a really dark background - that or you have to use to high ISO settings to allow for a correct aperture/shutter speed combo.
11-11-2012 02:36 PM - edited 11-11-2012 02:38 PM
You can but make sure you shutter speed does not exceed your shutter sync speed or set the speedlight to high speed sync. Note that hi speed sync will eat more power.
05/31/2023: New firmware updates are available.
EOS R6 Mark II - Version 1.1.2
05/18/2023: New firmware updates are available.
EOS Rebel T100 - Version 1.1.0
EOS 5D Mark IV - Version 1.4.0
EOS 6D Mark II - Version 1.2.0
PowerShot Elph 360HS - Version 18.104.22.168
PowerShot SX420 IS - Version 22.214.171.124
PowerShot 620 HS - Version 126.96.36.199
PowerShot SX720 HS - Version 188.8.131.52
PowerShot G1X Mark III - Version 184.108.40.206
PowerShot G7X Mark II - Version 220.127.116.11
PowerShot G9X Mark II - Version 18.104.22.168
04/20/2023: New firmware version 1.4.1 is available for EOS R3
03/30/2023: New firmware updates are available.
EOS 1DX Mark III- Version 1.7.1
Speedlite EL-1 - Version 1.0.2
03/30/2023: Product Advisory for EF50 F1.2 L USM
03/30/2023: Product Advisory for EOS R10
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM
Canon U.S.A Inc. All Rights Reserved. Reproduction in whole or part without permission is prohibited.