Roxie2401 wrote in post #16679170
Do you think this relates to using FEC & ETTL and they thought AFR was no longer necessary?
NEVEC first was discussed prior to 2004. Apparently one document mentions that the Elan 7E (c. 2000) has NEVEC.
Back in 2001, on dpreview forums AFR was discussed.
"Andy Miles wrote:
This article mentions a custom function that disables the ambient
'All EOS cameras have a built-in program called "automatic flash
reduction control" that varies flash exposure level according to
ambient light level. It applies standard flash exposure (no
compensation) in dark conditions, and reduced flash exposure in
bright conditions. This program was designed to provide
natural-looking flash fill in most bright conditions, so that even
a beginner without experience could achieve pro-quality results.
However, any flash exposure compensation set by the user on the
camera or Speedlite is applied on top of, net instead of, automatic
flash reduction contral. This may cause unexpected results in
bright conditions unless the automatic flash reduction is taken
into account. Some EOS cameras* are equipped with a Custom
Function** which shuts off automatic flash reduction central, thus
applying a standard flash exposure level in any lighting condition.
We recommend the use of this Custom Function' "
(apparently in 2001 the above link worked, but it is no longer active)
It also seems to be a feature listed by Canon outside USA, but not by Canon USA. In some current information (copyright 2014)
"Auto flash reduction
"You need to be careful when applying flash exposure compensation to cameras that use E-TTL metering. When you shoot in bright light, they assume that you are using flash for fill-in, and automatically provide flash reduction. If you apply further reduction, the fill-in effect may be too weak. You need to get to know your camera so that experience will tell you when to apply compensation and when to leave well alone.
"Some EOS models offer a custom function that disables automatic flash reduction. This has two uses. First, it allows you to take control of flash reduction in all situations − you don’t have to guess whether or not flash reduction has been applied − you know it hasn’t. Secondly, you can turn off the auto reduction when photographing backlit subjects. Here, you need a good burst of light from the Speedlite to add detail to the shadow areas of the subject."