Video Chat with a Photography Expert - Live

Pentax Mount Adapter K

BH #PEMAK • MFR #30120
Pentax Mount Adapter K
In Stock
Save the Tax with the credit card. 
Protect Your Gear
Add a protection plan from $10.79
Ask Our Experts

Pentax 30120 Overview

The Pentax Mount Adapter K allows a Takumar screw mount lens to attach to a Pentax K mount camera.

With this adapter the automatic diaphragm will not work, so meter reading must be made with the lens aperture stopped down.
UPC: 027075003965

Pentax 30120 Specs

Camera Mount
Pentax K
Lens Mount
Packaging Info
Package Weight
0.035 lb
Box Dimensions (LxWxH)
3.7 x 3.2 x 0.3"

Pentax 30120 Reviews

See any errors on this page? Let us know


got the pentax k3, is this addapter the right one to plug a Pentax M42 lens?
Asked by: Anonymous
Yes, that adapter will allow you to use M42 lenses on the K3. If you read the customer reviews on it you will see that people are quite pleased with its performance.
Answered by: Matthew C.
Date published: 2018-08-28

Will this work with the K1000? It doesn't have a ...

Will this work with the K1000? It doesn't have a way to do stopped-down metering even with native lenses and it seems as though the adapter may be depressing a pin in the camera
Asked by: Thorn
Yes, the following adapter is based on a Pentax K bayonet mount system.
Answered by: hectorm
Date published: 2021-10-17


Do you ship to Australia? More specifically, Western Australia?
Asked by: Anonymous
Yes, we ship many items to Australia. You may calculate your actual shipping options/order totals by adding the items you want to a shopping cart. It will then list the shipping options, descriptions, ETA's and fees to your location.
Answered by: Heather S.
Date published: 2018-08-28

Is this adaptor made by Rico or is it an ...

Is this adaptor made by Rico or is it an aftermarket maker?
Asked by: Bryand
This is an original (not aftermarket) adaptor made by Pentax. It comes in Pentax branded packaging.
Answered by: Cindy
Date published: 2022-01-03


I bought both an unused original Penac adaper for my K5II to use with tele Takumar M42 lenses but it wiggles iomce in the comera. Bought a chinese adapter, it is more stable but with rough machining. Is stil stable once in the camera mount? Or is wiggles like the knes i have.
Asked by: Sergio V.
Mounting a lens from the early days of Pentax (before the Spotmatics) the mounting flange on the lens can be too small. It may lead to a lens wiggle and some light leak through the slits in the adapter.
Answered by: Wim
Date published: 2023-10-26


Is this a genuine Pentax adapter?
Asked by: Anonymous
I hope you get other responses. I only used it a few times and not with me now while I am travelling. It seemed to be well made and fit nice with both the old Super Takumar lens and the K5 body. I don't recall any stamps that indicated Pentax but could have been.
Answered by: Dennis A.
Date published: 2018-08-28


Will this adapter depress the aperture pin and allow you to do stop down metering on any M or A lens
Asked by: Harry N.
Google pentax k mount adapter m42 stop down and read the article in the Pentax Forums titled How to stop down an M42 on a K-mount camera . In a nutshell, there is no aperature link between the m42 lens and the K mount camera. You must focus (for brightest view) fully open, read the meter at wide open, stop down to the aperture you desire, calculate the speed, set it and take the picture. It's been a while but if you do a depth of field preview stopped down, that should give you your shutter speed. Anyway, it is a small price to pay to allow you to use some of the excellent old glass out there.
Answered by: Doug R.
Date published: 2018-08-28


I tried out this adapter on my K3II with a Pentax Super Takumar 55mm lens (M42), and for the life of me I now cannot remove the adapter. Any tips/tricks? Thanks!
Asked by: Michael Farrell D.
With the 55 mm lens removed, one of the open slots on the adapter has a flat metal (spring) tab that needs to be compressed before removing adapter. Use a jeweler's screwdriver or something similar in size, Hope this was helpful.
Answered by: Jesse A.
Date published: 2022-01-03
  • y_2023, m_11, d_30, h_6CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.37
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_10
  • loc_en_US, sid_673977, prod, sort_[SortEntry(order=HAS_STAFF_ANSWERS, direction=DESCENDING)]
  • clientName_bhphotovideo