T. Hogan on D800 QC issue

Started 5 months ago | Discussions thread
inasir1971
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Re: T. Hogan on D800 QC issue
In reply to Daniel Lauring, 5 months ago

Daniel Lauring wrote:

inasir1971 wrote:

The Focal statistics are useless because of

(i) small sample size and

(ii) the severe adverse selection problem:

It is a paid program, a PIA, time consuming (I have been putt off running it because I perceive it to be this way) - all of which add up to mean that anyone who runs it and thus provides data is likely to be someone who is experiencing AF difficulties.

Few, if any, with perfectly functioning AF will expend the time and money to run Focal so it will not be a representative data sample.

While you could say the data could be more statistically significant, you can't say it isn't significant at all. The only statistical explanation for ALL Nikon's being worse than ANY Canon, would be Canon users like to tweak their good cameras with software, while Nikon users will only fix their really bad ones. That seems pretty implausible. The only scenario I could see for that, is if most Canon users send their bad cameras back to Canon, while Nikon users service the cameras themselves. If that were the case it leads to other concerns...like why do Nikon users not trust Nikon to fix their cameras like Canon users do, or perhaps, Nikon doesn't make the service as convenient...or it isn't free, like it is with Canon.

Any way you look at it, the data is troubling for Nikon.

Focal with Canons will run in completely auto mode while with Nikons it requires user intervention to adjust AF fine tune each time.

You cannot get around the problem that people who run Focal are much more likely than not to be people with problems. Further this issue differentially affects Canons and Nikons due to the additional user intervention (setting AF fine tune) required by users with Nikons making it even more likely that Nikon data is from users with problems.

Look at how much smaller the number of bodies for Nikons are compared to Canons.

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