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5D Mark III & 1D X Black Focus Point in AI Servo Information

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Canon Rumors:
Share Some technical stuff for you
I wrote about this functionality a few weeks ago, and it appears no solution is in sight. I have been given a bit of information as to why it may be difficult to address. Background
For some of us shooting the 5D Mark III, there is an issue that is driving some, not all, photographers bonkers. That is, when shooting in AI Servo mode, the focus point we have selected does not illuminate red, like it does on the EOS-1′s like the 1D Mark IV. The 7D has always had the black focus points in AI Servo and we never really heard many complaints about it. However, since the 5D3 came about, there have been countless complaints about shooting in AI servo mode without the illuminating focus points. I finally spent a serious amount of time with the 5D Mark III, and I am on the side of it being extremely annoying that I can’t see my AF point in AI servo mode in various situations. Lowlight, black shirts, birds in flight and that sort of thing. With the 61 AF points, I do move the focus point off of center during AI Servo usage. As mentioned, there have been lots of forum threads on the topic and I have finally heard from a few people what the issue is. Below is some technical information about why (correct me if we’re wrong).
The transmissive LCD is the issue with both the 5D Mark III and the 1D X. Despite greatly improved AF, the exposure is affected by the red light of the AF point. This is why they do not light up in AI servo just prior to the exposure reading being made. In order to solve the problem, Canon will have to figure a way to turn them on (red), yet adjust for the exposure differential. That isn’t as easy as it sounds, as each focus point will affect exposure slightly differently not to mention it’s also dependant on which exposure mode is active. Can it happen?
It’s possible, because I’m told Canon is working on a solution. They do know a segment of photographer is having trouble with the black AF points. I am told the 1D X will launch with the same functionality as the 5D Mark III. For some photographers, this is not an issue, or even a minor annoyance. cr

DustinF00:
I have an issue in just single shot mode, where when you half press for focus, the single focus point selected doesnt light up at all, so you have no idea what's trying to focus on where (if you say forget which AF Point you've left selected).

This behavior is driving me nuts.

Does this make sense to anyone else?

neuroanatomist:

--- Quote from: DustinF00 on May 24, 2012, 03:37:22 PM ---I have an issue in just single shot mode, where when you half press for focus, the single focus point selected doesnt light up at all, so you have no idea what's trying to focus on where (if you say forget which AF Point you've left selected).

--- End quote ---

AFAIK, you can set it to light up in the C.Fn's.

awinphoto:

--- Quote from: Canon Rumors on May 24, 2012, 03:27:35 PM --- The 7D has always had the black focus points in AI Servo and we never really heard many complaints about it. However, since the 5D3 came about, there have been countless complaints about shooting in AI servo mode without the illuminating focus points.</p>

--- End quote ---

Coming from the 7d, i guess it never really bothered me and I appreciated the AF system so i learned to deal.  When I had it in AI Focus, which I have my cameras set on most the time, It illuminates when it gets initial focus but doesn't after the subject starts moving.  I think it would annoy me more than help me if the freaking VF kept blinking as the subject moved and af adjusted.. Just kinda would drive me bonkers but my 2 cents. 

Drizzt321:
The solution is probably Canon running every single possible focus point combination against all metering modes under a variety of lighting & subject conditions to get information on how the metering is affected when it's black vs red. And then run a whole bunch of calculations, and figure out the best adjustments/algorithms to add into a later firmware. That's my guess, and it'd be extremely time consuming.

I for one would like this to be an option, and I'm hoping they do come up with the necessary fixes to release another firmware to enable this.

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