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07-13-2012, 10:11 AM   #1
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Lens difference ???

Can anyone tell me the difference between these two identically priced lenses on the Pentax store website:

SMC PENTAX DA 18-55MM F3.5-5.6 AL WR
($199)

SMC PENTAX DA 18-55MM F3.5-5.6 AL II
($199)

Only difference I can see is the design of the texture on the focus and zoom rings.
But that's just cuz I'm an ignorati noob.

Also, can anyone point me to a place that defines the different types of Pentax lenses?

Like, what does SMC mean?
And 'DA' and 'AL', 'WR' etc., etc.

Many thanks,

07-13-2012, 10:31 AM   #2
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The first is a Water resistant version and the second is the non-Water Resistant version. Same optics.

The lens section here (see top dark bar under LENSES) has reviews and comments on each model, both current and historic, for many lenses. There are in depth reviews of many of the more common models on the site as well.

Welcome Aboard!

Last edited by Docrwm; 07-13-2012 at 10:50 AM.
07-13-2012, 10:32 AM   #3
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For the same price, might as well go for the WR version.
07-13-2012, 10:37 AM   #4
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QuoteOriginally posted by ChucK20D Quote
SMC PENTAX DA 18-55MM F3.5-5.6 AL WR
($199)
this is the weather resistant one

QuoteOriginally posted by ChucK20D Quote
SMC PENTAX DA 18-55MM F3.5-5.6 AL II
($199)
improved over the first version for improved optics and optics for the WR are same as this from last reports


QuoteOriginally posted by ChucK20D Quote
Like, what does SMC mean?
And 'DA' and 'AL', 'WR' etc., etc.
SMC = Super Multi Coated ...long time acronym in Pentax
DA = denotes the lens family ... other family members being FA, A, M, K,
AL = Aspherical?
WR = weather resistant

07-13-2012, 10:39 AM   #5
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Here is a link to an explanation of the various Pentax lens mounts

Here is a link to the lens database here on the forum

The short answer to your lens question is that the WR means 'weather resistant' and has more seals than the non-WR version. Supposedly they are identical optically but that's just what I read.

Pentax K-mount lenses come in a number of different series:
'K' the original and only called K for convenience because there is no 'K' designation on the lens
'M' (Pentax-M) second series with smaller, lighter lenses but mostly the same functionality
'A' (Pentax-A) added control of the aperture by the camera by using electrical contacts
'F' (Pentax F) first auto-focus lenses
'FA' (Pentax FA) second series of auto-focus lenses
'DA' ( Pentax DA) modern lenses designed for APS-C sensor digital cameras
Some lenses will also have '*' in the name designating that they are the best Pentax could make

WR = Weather Resistant
SMC = Super-Multi-Coating a lens coating developed and used by Pentax, it has changed and improved over the years
IF = Internal focus
07-13-2012, 12:10 PM   #6
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Thank you!!!!!

I knew I'd come the right place.
WR it is. It'll go nicely with my weather-sealed K20D.
Thanks y'all.
07-13-2012, 12:39 PM   #7
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QuoteOriginally posted by ChucK20D Quote
I knew I'd come the right place.
WR it is. It'll go nicely with my weather-sealed K20D.
Thanks y'all.
Nice choice. I really enjoy my WR combo, let me keep going no matter what the impending weather is threatening. Hope you stick around and let us know how it works for you.
07-14-2012, 10:42 AM   #8
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QuoteOriginally posted by ChucK20D Quote
I knew I'd come the right place.
WR it is. It'll go nicely with my weather-sealed K20D.
Thanks y'all.
They don't have the "WR" designation but all high-grade DA* lineup are also Weather Resistant

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