Non-IF WR lenses

keos · 01-06-2019, 01:30 AM

How weather & dust resistant are the WR lenses that are not internal focus? I would think the zoom action would be pulling in a lot of air one way or another. Going on a trip where air quality may get a little dusty.

**aslyfox** · 01-06-2019, 03:30 AM

you may want to review this thread:

About those WR body weather seals...User responsibility and best practice - Page 4 - PentaxForums.com

Adam · 01-06-2019, 11:48 AM

Originally posted by keos

How weather & dust resistant are the WR lenses that are not internal focus? I would think the zoom action would be pulling in a lot of air one way or another. Going on a trip where air quality may get a little dusty.

There are only 3 lenses with internal zooming, and I agree, these would be the most convenient for super harsh environments:
Weather Sealed Lenses | PentaxForums.com

Most non-star lenses are branded WR rather than AW, which means they are not sealed against dust. However, they all have internal focusing with the exception of the 100mm macro and the 18-50mm, 18-55mm, 55-300mm F4-5.8, and 50-200mm kit lens variants.

As for the weather-sealed lenses with internal focusing, they should be OK to use as long as you are careful. You don't want to be zooming quickly or suddenly when the barrel is wet, of course. Use caution and you should be fine

01-06-2019, 01:30 AM	#1
keos Senior Member Join Date: Jan 2018 Posts: 108	Non-IF WR lenses How weather & dust resistant are the WR lenses that are not internal focus? I would think the zoom action would be pulling in a lot of air one way or another. Going on a trip where air quality may get a little dusty.

01-06-2019, 11:48 AM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Originally posted by keos How weather & dust resistant are the WR lenses that are not internal focus? I would think the zoom action would be pulling in a lot of air one way or another. Going on a trip where air quality may get a little dusty. There are only 3 lenses with internal zooming, and I agree, these would be the most convenient for super harsh environments: Weather Sealed Lenses \| PentaxForums.com Most non-star lenses are branded WR rather than AW, which means they are not sealed against dust. However, they all have internal focusing with the exception of the 100mm macro and the 18-50mm, 18-55mm, 55-300mm F4-5.8, and 50-200mm kit lens variants. As for the weather-sealed lenses with internal focusing, they should be OK to use as long as you are careful. You don't want to be zooming quickly or suddenly when the barrel is wet, of course. Use caution and you should be fine Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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01-06-2019, 03:30 AM	#2
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,581	you may want to review this thread: About those WR body weather seals...User responsibility and best practice - Page 4 - PentaxForums.com