Re: Possible that lens element manufacture has gone to China
- From: Rich <none@xxxxxxxx>
- Date: Sun, 30 Oct 2005 01:27:04 -0400
On Sat, 29 Oct 2005 02:29:11 GMT, "bmoag" <aetoo@xxxxxxxxxxx> wrote:
>I seriously doubt that Chinese quality control is anything like what
>Japanese manufacturers formerly achieved in their home contry facilities.
>Canon is not the only manufacturer experiencing quality problems with low
>cost Chinese factories. A case in point: the new Nikon 55-200. If this is an
>example of Chinese quality control in lens manufacturing I think we better
>all stock up now on what KEH and other reputable used dealers have to offer.
Problem is, the companies using them are not asking for that level of
control, even though it's possible, and cheaper than it would be in
Japan. Most of the work is done on computer-controlled equipment so
the human element is reduced and cost-savings only possible with
speeded up production time and corner cutting. It may be that
Japanese production has simply passed the point of affordability, at
least for camera lenses. But, the trick is that using better
materials in some ways makes up for lesser quality. Case in point, ED
glass used reduces aberrations even though it's overall quality
of manufacture may lag that of high precision older lenses. Material
versus production quality. It's very hard to polish fluorite (Canon
material) without sleeks owing to it's softness, so you may correct
colour aberrations while losing contrast due to polish quality. Trade
off one aberration for another, or rely on the material to correct
what production can't, due to cost. I've seen examples of this
myself.
-Rich
.
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