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06-09-2011, 08:43 AM   #1
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Pentax Macro 100mm F2.8 WR Product Number

Hi forum,

I just bought the smc Pentax D FA Macro 100mm F2.8 WR from Amazon. The product number imprinted on the box says 21910, but Pentax official website says this lens has a product number of 21917.

Does anyone know why the difference in P/N?


06-09-2011, 12:58 PM   #2
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I have no idea what's up with this but I suggest that you email Pentax about this mystery. Honestly, as long as the lens is the right one, I wouldn't be so concerned about what's on the box.
06-09-2011, 01:02 PM   #3
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I agree with Tim. If the less is 100%, then I would think the no. on the lens is the one to refer too, and then go out and enjoy.
It is a great lens.
06-09-2011, 01:29 PM   #4
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My box says 21910. My copy was purchased in Canada.

I also just checked B&H, and their MFR# is 21910 as well.

Google search shows both are used--weird, but nothing to worry about.

Great lens!

06-10-2011, 10:58 AM   #5
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Thanks All. The lens is the right one so I just keep it and ignore the P/N difference. I think somehow Pentax mis-printed their box with the Non-WR version P/N.
06-13-2011, 12:41 AM   #6
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Mine is 21910.

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