7d meter question

Hi

i have a question about the 7d meter system

on digital review i read http://www.dpreview.co​m/reviews/canoneos7d/p​age3.asp

i'm not sure , but the should meter work with 2 layers or 3 ?
2 layers Red->Green and Green->blue
3 layers color luminance contrast

and is the 7d the only camera with this meter?
or do the pro 1d have the same meter?

i don't talk about the zone , but the layers


for example the 1d mark IV has the same meter,hasn't it?
thanks

the T2i and 60D have this metering system too.

not sure on the 60D and T2i.... but the 7D also will follow the AF point selected....
meaning the camera will add more weight to exposure based AF point selected.

The 1D Mark IV does not support the iFCL metering system. It uses the same 63-zone metering system as the 1D Mark III.

But it's true that the 550D, 60D and 600D also use the iFCL metering, which was first introduced in the 7D.

When metering in evaluative mode with the 7D, the iFCL system prioritizes zones (out of the 63) where the active AF points, or point if only one is used, are located. But the 7D also always check the focus status for all 19 AF points, regardless of which is used. Points that aren't active, but still have focus, or near so, are considered to cover the main subject, so they are also given some priority in the calculation of the exposure of the image.

There are two different layers, sensitive to different color combinations, to allow the metering system to reduce the natural oversensitivity for red color tones.

It's reasonable to believe that the more recent cameras with iFCL behave in a similar way, even if they have less AF points, and thus less ability to assess where the main subject is located in the frame.

apersson850 wrote in post #11981759
The 1D Mark IV does not support the iFCL metering system. It uses the same 63-zone metering system as the 1D Mark III.

But it's true that the 550D, 60D and 600D also use the iFCL metering, which was first introduced in the 7D.

When metering in evaluative mode with the 7D, the iFCL system prioritizes zones (out of the 63) where the active AF points, or point if only one is used, are located. But the 7D also always check the focus status for all 19 AF points, regardless of which is used. Points that aren't active, but still have focus, or near so, are considered to cover the main subject, so they are also given some priority in the calculation of the exposure of the image.

There are two different layers, sensitive to different color combinations, to allow the metering system to reduce the natural oversensitivity for red color tones.

It's reasonable to believe that the more recent cameras with iFCL behave in a similar way, even if they have less AF points, and thus less ability to assess where the main subject is located in the frame.

thanks
don't understand why the id mark IV doesn't feature the new meter system
it's a pro camera, it should have the best
maybe IFCL is not better then the meter of the 5d mark2 , or the other cameras

Because Canon is very conservative when it comes to changing their top level models. Just look at the outside of a 1D Mark III and a 1D Mark IV. It's hard to tell them apart, if you don't look at the model number plate. Or turn on the rear display.
Obviously Canon didnt' dare introducing a new metering system in the 1D Mark IV, something their (mainly) professional customers aren't used to.

Another reason could be that the 63 zone iFCL system isn't compatible with a focusing system with 45 AF points, where the rows are skewed half a point, to make it even worse. They would probably have to go down to 19 points or so in the AF/metering relation. Also, remember that this relations slows the 7D down to about four frames/s in low light, regardless of which shutter speed you use. They may not have found that acceptable by their typical 1D series customers either.

Finally, the 1D Mark III already had a 63 zone metering system, so it was more similar to today's iFCL than the other 35 zone metering systems were.

apersson850 wrote in post #11985377
Because Canon is very conservative when it comes to changing their top level models. Just look at the outside of a 1D Mark III and a 1D Mark IV. It's hard to tell them apart, if you don't look at the model number plate. Or turn on the rear display.
Obviously Canon didnt' dare introducing a new metering system in the 1D Mark IV, something their (mainly) professional customers aren't used to.

Another reason could be that the 63 zone iFCL system isn't compatible with a focusing system with 45 AF points, where the rows are skewed half a point, to make it even worse. They would probably have to go down to 19 points or so in the AF/metering relation. Also, remember that this relations slows the 7D down to about four frames/s in low light, regardless of which shutter speed you use. They may not have found that acceptable by their typical 1D series customers either.

Finally, the 1D Mark III already had a 63 zone metering system, so it was more similar to today's iFCL than the other 35 zone metering systems were.

thanks
did not find a gain in the ifcl meter system
my 5d mark 2 and 5d expose better then the 7d

7d is a great camera , but the servo tracking mode is not very good ,to be kind , and the focusing point in the viewfinder are huge and ugly

mantra wrote in post #11986763
thanks
did not find a gain in the ifcl meter system
my 5d mark 2 and 5d expose better then the 7d

7d is a great camera , but the servo tracking mode is not very good ,to be kind , and the focusing point in the viewfinder are huge and ugly

Interesting: servo tracking has been extremely good on my 7D.
After precise tweaking of the custom functions that is.

I don't have any 5D cameras, so I can't compare with them. At least the 7d is not inferior to my prior EOS cameras.

It's good the AF points are big in the viewfinder. They should be even bigger, really, since they are in reality. Since the 7D has a superior viewfinder system, compared to the 5D, for example, with the ability to hide everything not active, making the AF points resemble their real size would be more feasible.

DutchVince wrote in post #11986818
Interesting: servo tracking has been extremely good on my 7D.
After precise tweaking of the custom functions that is.

maybe it's too much complex to some user(like me) a precise tweaking

i was trying to track some animals in the zoo with a 70-200 2.8L II
every 10 shots , 1 was sharp "enough"
don't want to make a compare or a vs , but the second day i was with a friend of mine , nikon d300s and 70-200 2.8 sigma , 10 shots always sharp
and i dont' shoot nikon, but the tracking was amazing really and i used a sigma

maybe it's me

mantra wrote in post #11987434
maybe it's too much complex to some user(like me) a precise tweaking

i was trying to track some animals in the zoo with a 70-200 2.8L II
every 10 shots , 1 was sharp "enough"
don't want to make a compare or a vs , but the second day i was with a friend of mine , nikon d300s and 70-200 2.8 sigma , 10 shots always sharp
and i dont' shoot nikon, but the tracking was amazing really and i used a sigma

maybe it's me

Probably he had set up his Nikon correctly.

The whole reason I bought the 7D was because it is so good at tracking.

Try my settings for my 7D for BIF. The % of keepers is very high


All settings saved under C1 (this is such an excellent feature!)

1. Use Zone AF or single point with expansion. Don't use 19 pointAF, it seems slower.
2. Use AI servo (AI focus reacts slower)
3. Auto ISO
4. Tv 1/1500
(5. Overexpose 1.5 stop [only for BIF])
6. Hi speed continuous shooting

7. Custom functions: CFN III
No.1: slightly slow or totally slow.
No.2: 0
No.3: 1
No.4: 1

8: turn IS of: there is no hand tremor at 1/1500 anyway.

for explanations on the custom functions see:
http://cpn.canon-europe.com …om_functions_ex​plained.do
Pages 4 and 5. (can't hotlink to the correct pages)

Examples:

mantra wrote in post #11987434
maybe it's too much complex to some user(like me) a precise tweaking

i was trying to track some animals in the zoo with a 70-200 2.8L II
every 10 shots , 1 was sharp "enough"
don't want to make a compare or a vs , but the second day i was with a friend of mine , nikon d300s and 70-200 2.8 sigma , 10 shots always sharp
and i dont' shoot nikon, but the tracking was amazing really and i used a sigma

maybe it's me

There is a learning curve to using the AF system in the 7D. It could be you were not using the appropriate AF option. Secondly, there have been some 7D's with focus issues. I would check your AF system in one shot mode and if you are getting a low number of in focus shots, then send it to canon for evaluation.

Somehow I manage to get pretty accurate focus about 95% of the time or better with my two 7D, usually shooting fast moving subjects with AI Servo.

The Nikon AF system seems slightly superior (although they got totally carried away with the number of AF points). If it's any consolation, I think Canon's image quality is slightly superior, higher resolution and better noise control. Color rendition of both is neck and neck. Metering systems are about equally capable.

The "secret" is to keep it simple and don't rely too heavily on the camera's automation. There's no substitute for the photographer doing their job. I use Single Point (usually the center one), AI Servo, and Back Button Focusing most of the time.

There are times when it's useful to use the other focus modes - Zone, All Points, Expansion Points and Spot Focus. But they need to be used judiciously. A lot of learning to use the 7D is learning to recognize when not to use particular modes.

But this post is about the new 63 zone iFCL metering system. I've found it pretty good. It was introduced on the 7D and is now used in 60D and T2i, soon on T3i as well.

I'm not so sure that the metering system on the 1D Mk4 isn't actually quite similar, with differences primarily being some fancy name the marketing department came up with for the 7D. The 1D series have used a 63 zone system for a while. Prior to 7D/60D/T2i, the xxD and xxxD cameras used a 35 zone system. Of course, the 5DII still uses it.

It's probably a "trickle down" from the higher end cameras (the way the 7D's AF system appears to be). But the 63 zone system in the 1D series and the one in the 7D/60D/T2i clearly aren't identical. Obviously the metering system needed to be tweaked for use in the croppers. Another clue, the 7D has a considerably smaller spot metering area than any 1D (I haven't compared 60D and T2i). I'd have expected just the opposite, if an identical metering sensor array were used.

Where I used to use ETTR (sometimes called HAMSTR here on POTN) a lot with the 35 zone system on the earlier cameras, I find I need to use it less with the 63 zone system.

Is the new metering system better? I dunno. I think it's subtly different. It has managed to nail some tough exposures for me (example, strong backlighting) that I think would have fooled the earlier system. But, it's still a reflective metering system and, as always, with type of metering come a lot of quirks that need to be compensated or corrected for by the shooter.

jase1125 wrote in post #11987756
Secondly, there have been some 7D's with focus issues. I would check your AF system in one shot mode and if you are getting a low number of in focus shots, then send it to canon for evaluation.

i won't say "some"
talking with a huge camera service they told me lots of cameras , lots

mine seems to focus correctly ,by the way i used the 1d mark IV , 10/10 shots perfect

jase1125 wrote in post #11987756
The "secret" is to keep it simple and don't rely too heavily on the camera's automation. There's no substitute for the photographer doing their job. I use Single Point (usually the center one), AI Servo, and Back Button Focusing most of the time.

There are times when it's useful to use the other focus modes - Zone, All Points, Expansion Points and Spot Focus. But they need to be used judiciously. A lot of learning to use the 7D is learning to recognize when not to use particular modes.


.

thanks
in short you use only 1 point to track in servo?