DA 50mm focusing click

Lee Malta · 09-28-2019, 11:07 AM

Hello Fellow Pentaxians,

I just bought the SMC Pentax-DA 50mm F1.8, It appears to be in mint condition.
As I have never had one before just wanted to know from regular users of this lens,
When I first attach the lens to the camera it seems to make a clicking sound on the first focus attempt is this Normal?
I put the camera in Manual focus and through the focus all the way in both directions, and its there again, now it focuses extremely fast so just wondered if its a kind of an internal slap due to the speed of the motor, just to add when it has done it once it seems normal when I just aim and focus on any target.

Many Thanks in Advance

Adam · 09-28-2019, 11:13 AM - **1 Like**

There should be no sounds other than the ad drive shaft engaging the first time you switch from mf to af, which should be nearly indistinguishable from the regular focusing sound. Could you post a video of the lens focusing?

builttospill · 09-28-2019, 12:55 PM - **1 Like**

I agree with Adam. There is a click when the AF coupler from the screw drive mechanism on the lens mount of the camera first engages the lens. It should only make this clicking noise once though, unless you switch to manual focus or remove the lens. Then it will click again as the protruding slot slides into place inside the crevice of the lens focusing mechanism.

09-28-2019, 11:07 AM	#1
Lee Malta Junior Member Join Date: Oct 2016 Location: Malta Photos: Albums Posts: 31	DA 50mm focusing click Hello Fellow Pentaxians, I just bought the SMC Pentax-DA 50mm F1.8, It appears to be in mint condition. As I have never had one before just wanted to know from regular users of this lens, When I first attach the lens to the camera it seems to make a clicking sound on the first focus attempt is this Normal? I put the camera in Manual focus and through the focus all the way in both directions, and its there again, now it focuses extremely fast so just wondered if its a kind of an internal slap due to the speed of the motor, just to add when it has done it once it seems normal when I just aim and focus on any target. Many Thanks in Advance

09-28-2019, 11:13 AM - 1 Like	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	There should be no sounds other than the ad drive shaft engaging the first time you switch from mf to af, which should be nearly indistinguishable from the regular focusing sound. Could you post a video of the lens focusing? 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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09-28-2019, 12:55 PM - 1 Like	#3
builttospill Pentaxian Join Date: Jun 2009 Location: Utah, Idaho Photos: Gallery Posts: 2,398	I agree with Adam. There is a click when the AF coupler from the screw drive mechanism on the lens mount of the camera first engages the lens. It should only make this clicking noise once though, unless you switch to manual focus or remove the lens. Then it will click again as the protruding slot slides into place inside the crevice of the lens focusing mechanism.