5D3 + AF assist beam = slower focus

[Carerra911]

Hello All,

While I am new on these forums I have been on the Canon Rumors Forums for a few years now, 

I really wanted to bring this too the attention of you and Canon as it is simply a highly important problem, those of you that don't know, the 5D3 suffers serious focus locking issues when a Canon speedite is attached in Low light, the AF assist beam causes lag with the AF from the 5D3, this makes it virtually impossible to achieve focus in low light when the speedlite is attached, I wanted to bring the topic to this forum, so I have pasted a link to all the discussion we have already had about this problem at Canon Rumors.com - see below

http://www.canonrumors.com/forum/index.php?topic=10275.0

Please help in letting Canon know this is a very serious problem and effects the cameras performance in most working environments when a speedlite is attached and working in low light, conferences, nightclub work, weddings etc, and can stop the photographer completing the job or task.

Regards

Louis

[dll1477]

As an observer of the different experiences here I can assure you studiorl, that something about your two cameras is different. At least, something is different about the way you describe your two cameras, compared to the way I and otheres are describing theirs.    it is not unlikely at all for two cameras to have the same mfg defect, esp. if they are early in the product life cycle and come from the same production run. 

It would be fascinating to compare performance using the EV standard that I refered to.  I'm happy to re-construct my tests as well to compare notes.  It should not be too difficult to create similar "enough" scenarios and compare results!