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Monster Adapter LA-KE1 Magic Ring Pentax K Lens to Sony E-Mount Camera Adapter

BH #MOPKSEA • MFR #LA-KE1
Monster Adapter LA-KE1 Magic Ring Pentax K Lens to Sony E-Mount Camera Adapter
Key Features
  • Pentax K Lens to Sony E-Mount Camera
  • Supports Pentax K Screw-Drive AF
  • Supports Electronic Communication
  • Supports Infinity Focus
The LA-KE1 Magic Ring Pentax K Lens to Sony E-Mount Camera Adapter from Monster Adapter allows select LA-KE1-mount autofocus DSLR lenses to be used on Sony E-Mount camera bodies while retaining electronic communication and autofocus function. This adapter has a built-in AF switch, screw-drive focus motor, aperture motor, and communication and power supply contacts. It can support KAF, KAF2, KAF3, and KAF4 lenses from 1986 to the present and can automatically identify traditional screw-drive focus lenses, SDM/DC lenses with built-in motors, lenses with traditional lever-type aperture, and electromagnetic aperture lenses.
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$349.00
Reg Price $439.00
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Lens Mount
Nikon F
Pentax K
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Monster Adapter LA-KE1 Overview

The LA-KE1 Magic Ring Pentax K Lens to Sony E-Mount Camera Adapter from Monster Adapter allows select LA-KE1-mount autofocus DSLR lenses to be used on Sony E-Mount camera bodies while retaining electronic communication and autofocus function. This adapter has a built-in AF switch, screw-drive focus motor, aperture motor, and communication and power supply contacts. It can support KAF, KAF2, KAF3, and KAF4 lenses from 1986 to the present and can automatically identify traditional screw-drive focus lenses, SDM/DC lenses with built-in motors, lenses with traditional lever-type aperture, and electromagnetic aperture lenses.

Available firmware for the adapter updates can be installed through the camera body.

Compatible Sony Camera Bodies
  • a9
  • a7S III
  • a7S II
  • a7S
  • a7R IV
  • a7R III
  • a7R II
  • a7R
  • a7C
  • a7 III
  • a7 II
  • a7
  • a6600
  • a6500
  • a6400
  • a6300
  • a6100
  • a6000
  • a5100
  • a5000
  • a3500
  • a3000
  • All NEX-series cameras
Compatible Pentax Lenses
  • HD PENTAX-DA 15mm f/4 AL Limited
  • HD PENTAX-DA 21mm f/3.2 ED AL Limited
  • HD PENTAX-DA 35mm f/2.8 Macro Limited
  • HD PENTAX-DA 40mm f/2.8 Limited
  • HD PENTAX-DA 70mm f/2.4 Limited
  • smc PENTAX-D FA Macro 100mm f/2.8 WR
  • smc PENTAX-DA 15mm f/4 AL Limited
  • smc PENTAX-DA 21mm f/3.2 AL Limited
  • smc PENTAX-DA 35mm f/2.8 Macro Limited
  • smc PENTAX-DA 40mm f/2.8 Limited
  • smc PENTAX-DA 40mm f/2.8 XS
  • smc PENTAX-DA 50mm f/1.8
  • smc PENTAX-DA 70mm f/2.4 Limited
  • smc PENTAX-FA 135mm f/2.8 [IF]
  • smc PENTAX-FA 28mm f/2.8 AL
  • smc PENTAX-FA 31mm f/1.8 AL Limited
  • smc PENTAX-FA 35mm f/2 AL
  • smc PENTAX-FA 43mm f/1.9 Limited
  • smc PENTAX-FA 77mm f/1.8 Limited
  • smc PENTAX-FA* 200mm f/2.8 ED[IF]
  • smc PENTAX-FA* 24mm f/2 AL[IF]
  • smc PENTAX-FA* 300mm f/2.8 ED[IF]
  • smc PENTAX-FA* 300mm f/4.5 ED[IF]
  • smc PENTAX-FA* 85mm f/1.4 [IF]
  • smc PENTAX-FA* 80-200mm f/2.8 ED[IF]
  • Samsung/Schneider D-XENOGON 35mm f/2
  • Samsung/Schneider D-XENON 100mm f/2.8 Macro

Monster Adapter LA-KE1 Specs

Adapter
Camera MountSony E
Lens MountPentax K
Electronic CommunicationYes
DisplayNo
Physical
DimensionsH: 3.1 x W: 2.4 x D: 0.9" / H: 80.0 x W: 60.0 x D: 23.0 mm
Weight3.4 oz / 96 g
Packaging Info
Package Weight0.365 lb
Box Dimensions (LxWxH)4.4 x 4.3 x 2.5"

Monster Adapter LA-KE1 Reviews

Great, but!

By Mario
Rated 3 out of 5
Date: 2022-04-06

I was a Pentax user, but some years ago I changed to Sony Mirrorless Camera. I own many lens on PK mount. For testing purpose I used a Sony Aps-C 6600 Camera. The adapter work well with SMC Pentax-DA 15mm, SMC Pentax-DA* 16-50mm, works with SMC Pentax-DA* 50-135. But it doesn't work with all other Pentax lenses I tested, like with 10-17mm fisheye zoom lens, also with the 18-250mm, the 17-70mm, the 80-320mm and others. In addition, it does not work with any lens from other makers, such as the Sigma 120-400mm zooms lens and the 70-200mm f/2.8 zoom lens. I know that these lenses weren't on the list, but it would have been reasonable to expect a minimum operation.

Great for MF but limited AF

By Howard
Rated 3 out of 5
Date: 2021-11-29

On A6409 and A7c of the lenses I've tried so far it works fine with manual focus on Da35 f2.4, Sigma 70 f2.8 macro, DA12-24 f4, DA 60-250. AF only works with DA100 macro WR and DA50 F1.8 though and then slow and jerky with the usual Sony problems focusing on anything lacking contrasty edges. Still happy with it, the 12-24 gives great results on the 6400 (and on A7C FROM 18mm) and the 100 macro is excellent on either body.

Works great now with version 2.0 firmware

By Jeffrey
Rated 4 out of 5
Date: 2022-02-03

Hi, I wrote the above review. I updated to the version 2 firmware and it now works in AF-C mode and with both my A7riii and A6600. I am now pleased with the performance and upgrading to 4 stars.

Spotty performance

By Jeffrey
Rated 2 out of 5
Date: 2021-12-20

As a little background, I love my Pentax limited lenses and my Sony cameras, so being able to use them together with AF has a lot of value for me. My first copy of the adapter would not work on my A7Riii or A6600 with any of my 5 Pentax lenses, so I returned it. ( I updated to the latest firmware on both cameras.) My second copy does not work with my A7riii, but does work with my A6600, but only in AF-S mode (not AF-C). AF on my A6600 is slow, but eye AF works ok, so I'm keeping the adapter. The main reason is that I like to be able to do portraits with my Pentax 77/1.8 and 43/1.8 lenses and the adapter is useable for that purpose. It would not work for autofocusing on a moving subject. I'm hopeful that Monster releases some new firmware that will fix the issue of that adapter not working on my A7riii and allow for AF in AF-C mode.

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Will there be one for Pentax to Fuji X mounts please?
Asked by: David
There are no Monster lens adapters for mounting a Pentax lens to a Fuji X-mount camera.
Answered by: Boyd
Date published: 2021-06-07

Is this for Screwdrive only lenses forever or ...

Is this for Screwdrive only lenses forever or just as the initial firmware? Is it planned to handle SDM/DC lenses down the road?
Asked by: Brad
As far as I know, SDM/DC lens will be supported in near future.
Answered by: Qiwen
Date published: 2021-09-30

Where can I get new firmware for the adapter and ...

Where can I get new firmware for the adapter and how to update the adapter?
Asked by: masterche
Check directly with the manufacturer for any available firmware updates via the MonsterAdapter Weibo, Facebook, or Twitter accounts. To update firmware, you'll need to connect the adapter to your camera body and then connect the camera to a computer via USB.
Answered by: Bjorn
Date published: 2021-12-01

Does the adaptor work for the third parties' ...

Does the adaptor work for the third parties' lenses, such as Tamron and Sigma?
Asked by: Hiroshi
No, the Monster Adapter KA-KE1 Magic Ring Pentax K Lens to Sony E-Mount Camera Adapter is only compatible with the following lenses: HD PENTAX-DA 35mm f/2.8 Macro Limited HD PENTAX-DA 40mm f/2.8 Limited HD PENTAX-DA 70mm f/2.4 Limited smc PENTAX-D FA Macro 100mm f/2.8 WR smc PENTAX-DA 15mm f/4 AL Limited smc PENTAX-DA 21mm f/3.2 AL Limited smc PENTAX-DA 35mm f/2.8 Macro Limited smc PENTAX-DA 40mm f/2.8 Limited smc PENTAX-DA 40mm f/2.8 XS smc PENTAX-DA 50mm f/1.8 smc PENTAX-DA 70mm f/2.4 Limited smc PENTAX-FA 135mm f/2.8 [IF] smc PENTAX-FA 28mm f/2.8 AL smc PENTAX-FA 31mm f/1.8 AL Limited smc PENTAX-FA 35mm f/2 AL smc PENTAX-FA 43mm f/1.9 Limited smc PENTAX-FA 77mm f/1.8 Limited smc PENTAX-FA* 200mm f/2.8 ED[IF] smc PENTAX-FA* 24mm f/2 AL[IF] smc PENTAX-FA* 300mm f/2.8 ED[IF] smc PENTAX-FA* 300mm f/4.5 ED[IF] smc PENTAX-FA* 85mm f/1.4 [IF] smc PENTAX-FA* 80-200mm f/2.8 ED[IF] Samsung/Schneider D-XENOGON 35mm f/2 Samsung/Schneider D-XENON 100mm f/2.8 Macro
Answered by: Lawrence
Date published: 2021-08-21

On the 80-200 zoom listed in the compatible list, ...

On the 80-200 zoom listed in the compatible list, will the NEX cameras be able to control the Power Zoom function?
Asked by: PiDicus
Yes, the adapter will allow you to take advantage of all functions the lens has to offer.
Answered by: hectorm
Date published: 2021-08-12

Does image stabilization in body work with this ...

Does image stabilization in body work with this mount adapter?
Asked by: Takashi
Yes, when adapting a lens to a camera with IBIS (in body image stabilization), the camera IBIS still works. This is true with all adapters, not just the Monster.
Answered by: Dan
Date published: 2021-07-27

I don't see most Pentax zoom lenses in the list, ...

I don't see most Pentax zoom lenses in the list, will this work on lenses such as the Pentax HD PENTAX D FA 150-450mm f/4.5-5.6 DC AW Lens? I have that and a couple of other really great lenses that I would want to use if I purchase the Sony A1 and am hopeful these lenses are supported.
Asked by: Jordana
Pentax HD PENTAX D FA 150-450mm f/4.5-5.6 DC AW Lens Pentax has a built-in DC type autofocus motor, but no provision for screw drive autofocus. For that reason the Monster Adapter LA-KE1 Magic Ring Pentax K Lens to Sony E-Mount Camera Adapter is not compatible.
Answered by: Lawrence
Date published: 2021-11-25

Will there be one for Fuji X mounts please?

Will there be one for Fuji X mounts please?
Asked by: David
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Answered by: Kirk
Date published: 2021-06-07
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