I am looking toi get a K1mkII - will this lens work?

LightSpeed · 03-11-2020, 01:38 PM

smc PENTAX-DA★16-50mmF2.8ED AL[IF] SDM

I already have this lens for my K5
Along with the wr macro lens.

I am assuming the DA* won't work to full capacity with the K1

**whammerhead** · 03-11-2020, 01:44 PM

I don't think so. Have a look at this: Pentax K-1 Lens Compatibility Guide - Articles and Tips | PentaxForums.com
and https://www.pentaxforums.com/compatibility/

Adam · 03-11-2020, 01:50 PM

The 16-50mm is a crop lens. You'll want to replace it with the DFA 24-70mm, ideally.

The 100mm wr macro is a full frame lens, so you'd be fine there.

zzeitg · 03-11-2020, 01:54 PM - **1 Like**

No... Full Frame Coverage of DA Lenses: Comprehensive Test - Gear Guides | PentaxForums.com

**beachgardener** · 03-11-2020, 03:49 PM

Originally posted by LightSpeed

I am assuming the DA* won't work to full capacity with the K1

K-1's have a crop mode, it would work in that, but yes not properly at full 35mm mode.

SharkyCA · 03-11-2020, 05:08 PM

Originally posted by LightSpeed

smc PENTAX-DA★16-50mmF2.8ED AL[IF] SDM

I already have this lens for my K5
Along with the wr macro lens.

I am assuming the DA* won't work to full capacity with the K1

Pentax K-1 II and SMC Pentax-DA* 16-50mm F2.8 ED AL [IF] - Compatibility | PentaxForums.com

noelpolar · 03-11-2020, 05:44 PM

My simple take on it is.... the 16-50 will work to it's full capacity....... and the K1 (whatever) will work functionally to it's full capacity but with APSC ball park resolution.

beachboy2 · 03-11-2020, 06:28 PM

Of course it will still work. Just accept that you will need to crop the image in post, or try using 1x1 crop mode on the K1ii.

**Rondec** · 03-12-2020, 03:13 AM

You can mount any K mount lens on a K-1 II. The DA lenses will typically require some amount of cropping in order to make them work. Some of the longer primes will be OK with a slight crop, some, like the DA *16-50 and wider primes will need basically a full APS-C crop.

You can choose to do that in post or just shoot in crop mode on the camera (or square mode if you like that better).

**clickclick** · 03-12-2020, 11:01 AM

If you use it in crop mode on the K-1 II, you will end up with a 16 MP picture. In this aspect, it will be like your K5 - you'll have the same FOV and pixel density that you are used to. And just to be clear, in crop mode, you're taking the portion of the image circle of the lens that doesn't have vignetting, hence you end up with the 16 MP output and same FOV as using the lens on APS-C. Hope this makes sense.

LightSpeed · 03-12-2020, 11:24 AM

Makes perfect sense.
Thanks guys

leekil · 03-12-2020, 11:27 AM

Do you have the lens already, or are you considering getting one?

03-11-2020, 01:38 PM	#1
LightSpeed Banned Join Date: Dec 2011 Posts: 639	I am looking toi get a K1mkII - will this lens work? smc PENTAX-DA★16-50mmF2.8ED AL[IF] SDM I already have this lens for my K5 Along with the wr macro lens. I am assuming the DA* won't work to full capacity with the K1

03-11-2020, 01:44 PM	#2
whammerhead Site Supporter Join Date: Aug 2019 Location: Belfast Posts: 128	I don't think so. Have a look at this: Pentax K-1 Lens Compatibility Guide - Articles and Tips \| PentaxForums.com and https://www.pentaxforums.com/compatibility/ Last edited by whammerhead; 03-11-2020 at 01:46 PM. Reason: addon

03-11-2020, 01:50 PM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	The 16-50mm is a crop lens. You'll want to replace it with the DFA 24-70mm, ideally. The 100mm wr macro is a full frame lens, so you'd be fine there. 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:

03-11-2020, 03:49 PM	#5
beachgardener Site Supporter Join Date: Sep 2013 Location: Australia Photos: Gallery Posts: 3,842	Originally posted by LightSpeed I am assuming the DA* won't work to full capacity with the K1 K-1's have a crop mode, it would work in that, but yes not properly at full 35mm mode. Last edited by beachgardener; 03-11-2020 at 08:56 PM.

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03-11-2020, 01:54 PM - 1 Like	#4
zzeitg Pentaxian Join Date: Sep 2014 Location: South Bohemia Photos: Gallery \| Albums Posts: 4,017	No... Full Frame Coverage of DA Lenses: Comprehensive Test - Gear Guides \| PentaxForums.com

03-11-2020, 05:08 PM	#6
SharkyCA Pentaxian Join Date: Sep 2017 Location: Carleton Place, Ontario, Canada Photos: Gallery Posts: 806	Originally posted by LightSpeed smc PENTAX-DA★16-50mmF2.8ED AL[IF] SDM I already have this lens for my K5 Along with the wr macro lens. I am assuming the DA* won't work to full capacity with the K1 Pentax K-1 II and SMC Pentax-DA* 16-50mm F2.8 ED AL [IF] - Compatibility \| PentaxForums.com

03-11-2020, 05:44 PM	#7
noelpolar Veteran Member Join Date: Oct 2013 Location: Goolwa, SA Photos: Gallery Posts: 4,310	My simple take on it is.... the 16-50 will work to it's full capacity....... and the K1 (whatever) will work functionally to it's full capacity but with APSC ball park resolution.

03-11-2020, 06:28 PM	#8
beachboy2 Senior Member Join Date: Dec 2012 Location: Perth Western Australia Photos: Gallery Posts: 222	Of course it will still work. Just accept that you will need to crop the image in post, or try using 1x1 crop mode on the K1ii.

03-12-2020, 03:13 AM	#9
Rondec Loyal Site Supporter Join Date: Mar 2009 Location: Gladys, Virginia Photos: Gallery Posts: 27,653	You can mount any K mount lens on a K-1 II. The DA lenses will typically require some amount of cropping in order to make them work. Some of the longer primes will be OK with a slight crop, some, like the DA *16-50 and wider primes will need basically a full APS-C crop. You can choose to do that in post or just shoot in crop mode on the camera (or square mode if you like that better).

03-12-2020, 11:01 AM	#10
clickclick Loyal Site Supporter Join Date: May 2016 Location: East Coast Posts: 2,903	If you use it in crop mode on the K-1 II, you will end up with a 16 MP picture. In this aspect, it will be like your K5 - you'll have the same FOV and pixel density that you are used to. And just to be clear, in crop mode, you're taking the portion of the image circle of the lens that doesn't have vignetting, hence you end up with the 16 MP output and same FOV as using the lens on APS-C. Hope this makes sense.

03-12-2020, 11:24 AM	#11
LightSpeed Banned Join Date: Dec 2011 Posts: 639 Original Poster	Makes perfect sense. Thanks guys

03-12-2020, 11:27 AM	#12
leekil Pentaxian Join Date: May 2016 Photos: Albums Posts: 2,003	Do you have the lens already, or are you considering getting one?