Ken rockwell has spoken...

Started Dec 2, 2008 | Discussions thread
bobn2
bobn2 Forum Pro • Posts: 55,356
Re: Same front end

Marianne Oelund wrote:

bobn2 wrote:

Ken is wrong - the D3x costs Nikon less to make than the D3 because
it doesn't require the six AD9974 analog front end chips, which are
expensive, so it should cost $1000 less than the D3.

Both the D3 and D3X sensors are described by Nikon as "12-channel
readout" so I would expect both to have the same front end design.
The on-chip A/D converters aren't used (or may not even be present in
Nikon's variant).

No they aren't, you have to parse what they say very carefully. Read here: http://chsvimg.nikon.com/products/imaging/lineup/d3/en/features/performance/

It says specifically that the D3x has on-chip ADC's, and the sentence construction means that the 12 channel readout applies to just the D3. Similarly, the diagram here http://chsvimg.nikon.com/products/imaging/lineup/d3/en/features/proven/ is labelled 'D3', and the text says nothing specific about 12 channel analog outputs. Moreover, the chip pinout appears to be identical with the A900. I have seen the 12 bit digital output of the A700/D300 referred to as '12 output channels', and I'd guess that's what's going on here - after all it's written by copywriters not technical authors.
--
Bob

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