HD Pentax-DA* 16-50mm F2.8 lens question

Michael Piziak · 07-17-2021, 11:53 AM

Will the new
HD Pentax-DA* 16-50mm F2.8 lens

work on my aging K-s2 ?

I know the general rule of thumb is that new Pentax camera bodies are compatible with older lens, but the older camera bodies aren't always compatible with the newest lens (which is the way it should be) ....

**ramseybuckeye** · 07-17-2021, 12:10 PM

I think so, as the K-50 was the oldest camera that could use the PLM lenses.

AfterPentax Mark II · 07-17-2021, 01:28 PM - **1 Like**

Originally posted by ramseybuckeye

I think so, as the K-50 was the oldest camera that could use the PLM lenses.

Hi MIchael,
I think you mean for the use with an electro magnetic aperture control. As in the info on the website it works backwards up to the K50, so the K-S2 can be used with the new 16-50!. Backwards to K100D (with the right firmware) you can use PLM, which is the AF-motor. I think Ramseybuckeye got the technicals confused. PLM stands for Pulse Motor, nothing to do with aperture.

Adam · 07-17-2021, 03:03 PM - **1 Like**

Originally posted by Michael Piziak

Will the new
HD Pentax-DA* 16-50mm F2.8 lens

work on my aging K-s2 ?

I know the general rule of thumb is that new Pentax camera bodies are compatible with older lens, but the older camera bodies aren't always compatible with the newest lens (which is the way it should be) ....

We have a tool that answers just this question:
Pentax K-S2 and HD Pentax-DA* 16-50mm F2.8ED PLM AW - Compatibility | PentaxForums.com

The use of PLM doesn't affect compatibility any differently than other in-lens AF technologies. It's the KAF4 mount that imposes limitations, which are fortunately addressed through a firmware update on the K-S2. Bodies older than the K-50 won't be able to stop the lens down.

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:

Michael Piziak · 07-17-2021, 07:00 PM

Originally posted by Adam

We have a tool that answers just this question:
Pentax K-S2 and HD Pentax-DA* 16-50mm F2.8ED PLM AW - Compatibility | PentaxForums.com

The use of PLM doesn't affect compatibility any differently than other in-lens AF technologies. It's the KAF4 mount that imposes limitations, which are fortunately addressed through a firmware update on the K-S2. Bodies older than the K-50 won't be able to stop the lens down.

Thank you Adam !

---------- Post added 07-17-21 at 07:01 PM ----------

Originally posted by AfterPentax Mark II

Hi MIchael,
I think you mean for the use with an electro magnetic aperture control. As in the info on the website it works backwards up to the K50, so the K-S2 can be used with the new 16-50!. Backwards to K100D (with the right firmware) you can use PLM, which is the AF-motor. I think Ramseybuckeye got the technicals confused. PLM stands for Pulse Motor, nothing to do with aperture.

Thank you also AfterPentax Mark II

peggers · 07-18-2021, 08:55 PM

Originally posted by Adam

We have a tool that answers just this question:
Pentax K-S2 and HD Pentax-DA* 16-50mm F2.8ED PLM AW - Compatibility | PentaxForums.com

The use of PLM doesn't affect compatibility any differently than other in-lens AF technologies. It's the KAF4 mount that imposes limitations, which are fortunately addressed through a firmware update on the K-S2. Bodies older than the K-50 won't be able to stop the lens down.

Yet another reason why this forum is so useful for Pentax users. Thank Adam

07-17-2021, 11:53 AM	#1
Michael Piziak Closed Account Join Date: Dec 2013 Location: West Virginia Posts: 2,815	*HD Pentax-DA 16-50mm F2.8 lens question Will the new HD Pentax-DA* 16-50mm F2.8 lens** work on my aging K-s2 ? I know the general rule of thumb is that new Pentax camera bodies are compatible with older lens, but the older camera bodies aren't always compatible with the newest lens (which is the way it should be) ....

07-17-2021, 01:28 PM - 1 Like	#3
AfterPentax Mark II Pentaxian Join Date: Mar 2021 Posts: 1,462	Originally posted by ramseybuckeye I think so, as the K-50 was the oldest camera that could use the PLM lenses. Hi MIchael, I think you mean for the use with an electro magnetic aperture control. As in the info on the website it works backwards up to the K50, so the K-S2 can be used with the new 16-50!. Backwards to K100D (with the right firmware) you can use PLM, which is the AF-motor. I think Ramseybuckeye got the technicals confused. PLM stands for Pulse Motor, nothing to do with aperture. Last edited by AfterPentax Mark II; 07-17-2021 at 01:29 PM. Reason: typo

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07-17-2021, 12:10 PM	#2
ramseybuckeye Site Supporter Join Date: Apr 2009 Location: Hampstead, NC Photos: Gallery Posts: 17,292	I think so, as the K-50 was the oldest camera that could use the PLM lenses.

07-17-2021, 03:03 PM - 1 Like	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Originally posted by Michael Piziak Will the new *HD Pentax-DA 16-50mm F2.8 lens** work on my aging K-s2 ? I know the general rule of thumb is that new Pentax camera bodies are compatible with older lens, but the older camera bodies aren't always compatible with the newest lens (which is the way it should be) .... We have a tool that answers just this question: Pentax K-S2 and HD Pentax-DA* 16-50mm F2.8ED PLM AW - Compatibility \| PentaxForums.com The use of PLM doesn't affect compatibility any differently than other in-lens AF technologies. It's the KAF4 mount that imposes limitations, which are fortunately addressed through a firmware update on the K-S2. Bodies older than the K-50 won't be able to stop the lens down. 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:

07-17-2021, 07:00 PM	#5
Michael Piziak Closed Account Join Date: Dec 2013 Location: West Virginia Posts: 2,815 Original Poster	Originally posted by Adam We have a tool that answers just this question: Pentax K-S2 and HD Pentax-DA* 16-50mm F2.8ED PLM AW - Compatibility \| PentaxForums.com The use of PLM doesn't affect compatibility any differently than other in-lens AF technologies. It's the KAF4 mount that imposes limitations, which are fortunately addressed through a firmware update on the K-S2. Bodies older than the K-50 won't be able to stop the lens down. Thank you Adam ! ---------- Post added 07-17-21 at 07:01 PM ---------- Originally posted by AfterPentax Mark II Hi MIchael, I think you mean for the use with an electro magnetic aperture control. As in the info on the website it works backwards up to the K50, so the K-S2 can be used with the new 16-50!. Backwards to K100D (with the right firmware) you can use PLM, which is the AF-motor. I think Ramseybuckeye got the technicals confused. PLM stands for Pulse Motor, nothing to do with aperture. Thank you also AfterPentax Mark II

07-18-2021, 08:55 PM	#6
peggers Senior Member Join Date: Apr 2012 Location: Endeavour Hills, Victoria, Australia Photos: Gallery Posts: 210	Originally posted by Adam We have a tool that answers just this question: Pentax K-S2 and HD Pentax-DA* 16-50mm F2.8ED PLM AW - Compatibility \| PentaxForums.com The use of PLM doesn't affect compatibility any differently than other in-lens AF technologies. It's the KAF4 mount that imposes limitations, which are fortunately addressed through a firmware update on the K-S2. Bodies older than the K-50 won't be able to stop the lens down. Yet another reason why this forum is so useful for Pentax users. Thank Adam