Will the Pentax DA 55-300mm PLM WR RE work on a K5 ??

**jpzk** · 02-09-2017, 04:29 PM

Just wondering if that lens would work on a K5 because of its KAF4 mount.

Mod's: If that has been asked previously please delete or move accordingly? I couldn't find an answer.
Thanks !

**lithedreamer** · 02-09-2017, 04:34 PM

No. The K-5 hasn't received a firmware update to support PLM lenses.

Adam · 02-09-2017, 04:45 PM

Originally posted by jpzk

Just wondering if that lens would work on a K5 because of its KAF4 mount.

Mod's: If that has been asked previously please delete or move accordingly? I couldn't find an answer.
Thanks !

Correct, the camera won't be able to control the lens aperture. I think it will always shoot wide-open.

Manual and auto focusing should work, though it's not something I've tested.

jddwoods · 02-09-2017, 06:21 PM

I have a K-3 and K-5 but have only tried it on the K-3 where it works beautifully. I never tried it on the K-5. This is due to the older camera not able to control the electromagnetic aperture. By releasing the K-3 version 1.30 firmware upgrade Ricoh successfully tempted me enough to buy the 55-300 PLM. Now I suppose by not releasing a firmware upgrade for the K-5 they are trying to tempt me into buying the KP

stevebrot · 02-09-2017, 06:24 PM

Originally posted by jpzk

Just wondering if that lens would work on a K5 because of its KAF4 mount.

Nope, while the KAF2 (crippled) mount on the K-5 series has all the required contacts to support a KAF4 lens, the body lacks support to control the in-lens aperture motor. The K-50 is the oldest body offering updated firmware for KAF4 support.

Steve

**jpzk** · 02-09-2017, 06:59 PM

Thanks for the information, folks!

Well, that settles the matter.

Cheers!

02-09-2017, 04:29 PM	#1
jpzk Site Supporter Join Date: Jan 2009 Location: Québec Photos: Gallery \| Albums Posts: 8,251	Will the Pentax DA 55-300mm PLM WR RE work on a K5 ?? Just wondering if that lens would work on a K5 because of its KAF4 mount. Mod's: If that has been asked previously please delete or move accordingly? I couldn't find an answer. Thanks !

02-09-2017, 04:45 PM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by jpzk Just wondering if that lens would work on a K5 because of its KAF4 mount. Mod's: If that has been asked previously please delete or move accordingly? I couldn't find an answer. Thanks ! Correct, the camera won't be able to control the lens aperture. I think it will always shoot wide-open. Manual and auto focusing should work, though it's not something I've tested. 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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02-09-2017, 04:34 PM	#2
lithedreamer Site Supporter Join Date: Sep 2013 Photos: Gallery \| Albums Posts: 1,799	No. The K-5 hasn't received a firmware update to support PLM lenses.

02-09-2017, 06:21 PM	#4
jddwoods Pentaxian Join Date: Nov 2012 Location: Newark, Delaware Posts: 1,035	I have a K-3 and K-5 but have only tried it on the K-3 where it works beautifully. I never tried it on the K-5. This is due to the older camera not able to control the electromagnetic aperture. By releasing the K-3 version 1.30 firmware upgrade Ricoh successfully tempted me enough to buy the 55-300 PLM. Now I suppose by not releasing a firmware upgrade for the K-5 they are trying to tempt me into buying the KP

02-09-2017, 06:24 PM	#5
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by jpzk Just wondering if that lens would work on a K5 because of its KAF4 mount. Nope, while the KAF2 (crippled) mount on the K-5 series has all the required contacts to support a KAF4 lens, the body lacks support to control the in-lens aperture motor. The K-50 is the oldest body offering updated firmware for KAF4 support. Steve

02-09-2017, 06:59 PM	#6
jpzk Site Supporter Join Date: Jan 2009 Location: Québec Photos: Gallery \| Albums Posts: 8,251 Original Poster	Thanks for the information, folks! Well, that settles the matter. Cheers!