DA 17-70 weather sealing?

Started May 1, 2012 | Discussions thread
hikenhi
Regular MemberPosts: 498Gear list
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Re: Too bad 17-70 f4 is KAF3...most people think you're up a creek...
In reply to SRT201, May 4, 2012

Most people are under the misconception that if your SDM fails, your up a creek when it comes to Auto focus. This is not the case, unless it's a KAF3. KAF2 SDM's are actually better than just screw drives because you have a redundant auto-focus system. What will you do if your camera's screw drive system takes a dump in the field?

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Pentax K-7 Pentax K-5 Tamron SP AF 70-200mm F/2.8 Di LD (IF) MACRO Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM Pentax smc DA* 50-135mm F2.8 ED (IF) SDM +5 more
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