July 26, 2014, 10:10:02 AM

Author Topic: *UPDATE* Canon Rebel T4i/650D on June 8 [CR3]  (Read 30696 times)

briansquibb

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Re: *UPDATE* Canon Rebel T4i/650D on June 8 [CR3]
« Reply #120 on: June 10, 2012, 05:14:15 PM »
No reason the AF system couldn't dynamically reconfigure the available AF points and point spread by lens with such knowledge.

Except the camera wouldn't know about all the lens.

Even DxO software cant cope with large whites (which is a major reason one might buy DxO) - so it would be a logistical nightmare trying to maintain the firmware as new lens come to market several years down the line.

That wouldn't be the case if the necessary information comes from the lens itself. If lenses are equipped with microchips that fully describe the optical characteristics, then the AF system wouldn't need firmware updates.

So a whole new system then? ....

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Re: *UPDATE* Canon Rebel T4i/650D on June 8 [CR3]
« Reply #120 on: June 10, 2012, 05:14:15 PM »

AvTvM

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Re: *UPDATE* Canon Rebel T4i/650D on June 8 [CR3]
« Reply #121 on: June 10, 2012, 07:19:43 PM »
So a whole new system then? ....

not necessarily. Canon EF and EF-S lenses are already chipped. They just need to write a couple of additional "optical characteristics" bits onto them. For existing lenses in the field it might be done attached to a camera via FW-Update. 

briansquibb

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Re: *UPDATE* Canon Rebel T4i/650D on June 8 [CR3]
« Reply #122 on: June 10, 2012, 08:21:18 PM »
So a whole new system then? ....

not necessarily. Canon EF and EF-S lenses are already chipped. They just need to write a couple of additional "optical characteristics" bits onto them. For existing lenses in the field it might be done attached to a camera via FW-Update.

Good idea!

Not sure it will fly though :(

V8Beast

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Re: *UPDATE* Canon Rebel T4i/650D on June 8 [CR3]
« Reply #123 on: June 11, 2012, 04:29:21 PM »
20D
Color Depth: 21.9 bits
DR: 11 Evs
ISO: 721

7D:
Color Depth: 22 bits
DR: 11.7 Evs
ISO: 854

70d & 7d2:
Color Depth: 22,1 bits
DR: 11.8 Evs
ISO: 855

Sounds about right. Don't forget the touch screen ;D

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Re: *UPDATE* Canon Rebel T4i/650D on June 8 [CR3]
« Reply #123 on: June 11, 2012, 04:29:21 PM »