For the LAST TIME...raise your right hand and repeat:

RichA wrote:

nospam wrote:
In article , Rich
wrote:

I'd agree with that except for two possible exceptions. Some users of
Nikon's D80 and D90 have reported intermittent focusing issues with
heavier lenses like the 17-55mm. This could very well be the result of
body flexture since no other cause has been isolated and the same problem
has not been seen with the D300. But, not many D90 owners are willing to
pay for a 17-55mm so the problem is not a hugely important one.
nonsense. the chassis is metal.

What's it anchored to? Plastic.

Bristolian: Really Rich, think about what you have just written. If
taken literally (i.e. the metal chassis is anchored to the plastic body)
then you are saying that the plastic is the stronger material of the
two. Kinda goes against your previous ramblings.


Second,
plastic bodies, black ones, heat up much faster and hotter than black
metal bodies when exposed to the sun.
metal will heat up and conduct it to the internals of the camera faster
than plastic will.


Conducts heat better yes, heats up faster, no and not as hot. I've
tested this. Paint or anodizing on a metal surface (black) does not
absorb IR as much as black molded plastic used for camera bodies does.

Bristolian: Are you saying that only the IR element of the sun's rays
have a heating effect? Hmm, that's gonna screw up the laws of physics
(as we know them). Metallic substances are denser than plastics (with
one or two very specialised exceptions) which means that their molecules
are packed tighter together resulting in a) more rapid heating (due to
the molecules bumping into each other more) and b) greater heat transfer
through the material (for the same reason).

So, you're either a ****ing liar and have never done any tests at all or
just an imbecile - or both.

Have a nice day :-)

--
Regards

Bristolian