It's Nikon who uses the term 3D-matrix, taking into account distance
info from lenses...
On 17/06/2012, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> Ken is trying to invent a marketing term but too late for the now
> defunct Minolta. Minolta never used the term "matrix" let alone "3D
> matrix". I'm sure what he's talking about is what Minolta called
> "multi-segment" metering. For the A1 it's described as:
>
> "uses 300 segments to measure luminance and color. This data is
> combined with distance information to calculate the camera exposure.
> This advanced metering system will give accurate worry-free exposures in
> almost all situations."
>
> I see that the terminology has been carried over to Sony DSLRs with the
> A900 having 40 segments. But the A900 manual makes no mention of
> distance integration perhaps because many lenses don't pass distance
> data. The A1 with its integrated 28-200mm equivalent lens does know
> focusing distance and the sensor based exposure system can have lots
> more segments. By the time we get to the NEX-7, however,
> "multi-segment" has morphed into "multi-pattern" and again there is no
> mention of distance.
>
> I suspect that there's a patent application or Minolta white-paper
> somewhere that describes how distance info is integrated into the
> exposure calculation but I'm unaware of it.
>
> ps: I agree that the A1's metering system is quite accurate.
>
> Chuck Norcutt
>
>
> On 6/17/2012 12:41 AM, Moose wrote:
>> On 6/16/2012 10:02 AM, Ken Norton wrote:
>>> ... But, Minolta did even better with the A1 by adding the 3D
>>> matrix to it.
>>
>> OK, I'll let the flacks throw wild terms around for marketing. What
>> is 3D matrix? What's the third dimension? Time? How?
>>
>> Curious Moose
>>
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