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Mitutoyo 7.5x defective

 
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ChrisR
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Joined: 14 Mar 2009
Posts: 7832
Location: Near London, UK

PostPosted: Wed Apr 26, 2017 2:05 pm    Post subject: Mitutoyo 7.5x defective Reply with quote

Reminder:
As discovered by Chris S., and previously reported.
Defective Mitutoyo 7.5x/0.21 serial number is R33036811.

It may be on ebay again.
100% test doesn't mean it passed the test...
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Chris S.
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Joined: 05 Apr 2009
Posts: 3040
Location: Ohio, USA

PostPosted: Thu Apr 27, 2017 9:24 pm    Post subject: Re: Mitutoyo 7.5x defective Reply with quote

I echo ChrisR's advice to be cautious about this lens.

Am nearly certain that photographs shown for eBay item 262953739749 are of a lens I tested and found defective. (If anyone cares to see the test images, with comparisons against a "known-good" specimen, PM me.) The serial number of the specimen I tested (as listed by ChrisR) matches the serial number of the eBay lens pictured, for those digits of the serial number that can be read. The scrapes on the front of the eBay lens exactly match my recollection of the tested lens. So either this is the lens I tested, or the vendor is showing photos of a different lens from the one on offer, without disclosure (a practice I detest).

I sent a message to the vendor asking for the serial number of the lens. Vendor replied: "hello ,what do you need serial number ?"[sic]

I answered: "I myself tested the lens shown in your pictures, and it failed these tests--it is defective. However, if you are selling a different lens from the one in the pictures, it might be good."

So far, there has been no reply.

--Chris S.
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Lou Jost



Joined: 04 Sep 2015
Posts: 2717
Location: Ecuador

PostPosted: Thu Apr 27, 2017 9:45 pm    Post subject: Reply with quote

It is great that you were so alert to catch that. Ebay can be a cesspool, but a little policing might go far to make our particular eBay alcove a bit safer to swim in. Thanks for doing that!
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