First bad 18-250 shows up.

Started Nov 5, 2007 | Discussions thread
grahamdyke
Regular MemberPosts: 152
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Re: First bad 18-250 shows up.
In reply to grahamdyke, Nov 11, 2007

Right here we are again then, got the lens back from Tamron UK (Intro2020) and collected it on Wednesday.

I finally managed to retest the lens on Saturday 10/11/2007 and here are the results.

A18-F1.JPG is the far left and right, full size crop portions of an image taken at:
ISO 100, 1/400 sec, f/3.5, 18mm.

A18-F2.JPG is the far left and right, full size crop portions of an image taken at:
ISO 100, 1/250 sec, f/4.5, 18mm.

A18-F3.JPG is the far left and right, full size crop portions of an image taken at:
ISO 100, 1/40 sec, f/11, 18mm.

So as we can see and much to my surprise, everything now appears to be great.

In fact the left side is now so sharp that it makes the right side look a little soft, but that's just being picky.

So if there are any other disgruntled Tamron 18-250 owners out there, don't worry, just send the lens back to Tamron and get it serviced under warranty.

Here's what Tamron did to the lens to fix it:
Re-centered at the wide 18mm end and adjusted wide resolution power.
Adjusted light axis and focus shift to within standard.

Now I'm officially impressed and look forward to getting out there and shooting some of those autumn colours before they all disappear.

Here's the link to the full gallery again for convenience:
http://www.entsoft.co.uk/Web%20Albums/K10D%20A18%20Samples/index.html
--
Graham Dyke

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