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- Path: sparky!uunet!think.com!rpi!utcsri!csri.toronto.edu!acs
- Newsgroups: rec.photo
- From: acs@csri.toronto.edu (Alvin Chia-Hua Shih)
- Subject: Re: Plastic Canon
- Message-ID: <1993Jan24.113006.25411@jarvis.csri.toronto.edu>
- References: <nicholson.11@main.mndly.umn.edu>
- Date: 24 Jan 93 16:30:06 GMT
- Lines: 59
-
- In <nicholson.11@main.mndly.umn.edu> nicholson@main.mndly.umn.edu (JOHN JAY NICHOLSON) writes:
-
- >Why are most Canon cameras made of mostly plastic? You pick up the Elan or
- >the new A2E, and they feel so cheap? I understand that the EOS 1 is a very
- >well made camera, and is very durable, but all the others that I have seen
- >are almost pure plastic. If you don't believe me, open the back of the A2E
- >and look.
-
- I put this question to Chuck Westfall, Technical Information Specialist
- at Canon USA. I find his reply reasonably convincing:
-
- Alvin,
-
- This has always been a thorny question to answer. There are two key issues:
- (A) the weight differential between polycarbonate and metal; and (B) the
- reliability of engineering plastics for cameras.
-
- Concerning the weight differential between polycarb and metal, I don't think
- its realistic to expect the A2/E to be made any heavier than it is. Extra
- weight considered independently is obviously undesirable and costly. It's
- been a constant goal in camera design to minimize weight and cost while
- maintaining features and reliability.
-
- Concerning reliability, I prefer to let product quality speak for itself.
- I believe in field experience more than lab tests. So far, the EOS 10s, Elan
- and A2/E have not disappointed me in this regard. For example, we constantly
- loan out Elans and 10s's to professional photographers through our CPS loan
- program. (The EOS A2 and A2E will be phased into our program this year.)
- Pros are notorious for abusing loan equipment, but our experience has shown
- that both the Elan and 10s are remarkably reliable.
-
- Moreover, when it comes to reliability of plastics in camera body design,
- Canon is in a better position than most manufacturers to make the statement
- that they hold up quite well in the long term. We pioneered the development
- of plastic-bodied SLRs as early as 1978 with the AV-1, followed in 1982 by
- the AL-1 and in 1983 by the T50. Each of these cameras has been on the
- market for at least 10 years by now, with no body-related problems of any
- kind. To be sure, they were designed as entry-level amateur cameras, but
- they provided a wealth of manufacturing experience which has been used in
- the ongoing development of the EOS series.
-
- Alvin, maybe you should ask these people what makes them think that a
- polycarbonate body is a problem. Are they mechanical engineers? Have any of
- them personally run durability tests on the equipment? Where is their
- documented research?
-
- Canon Inc. has conducted a great deal of research on all aspects of the use
- of plastics in cameras, including resistance to heat, impact, vibration,
- static pressure and drop-shock. The EOS A2 and A2E (as well as other EOS
- cameras) have passed all these tests with flying colors.
-
- Regards--Chuck
-
- --
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