K-3 III How-to: Using M and K Lenses
How to use M and K series lenses with the K-3 III
By PF Staff in Articles and Tips on May 27, 2021
The process of using manual focus lenses with no A-setting on the aperture ring has been vastly improved with the new Pentax K-3 Mark III DSLR. It is now as easy to shoot in Av mode with The K-3 III as it was with the beloved film cameras like the ME, K2, Super Program, Super A, etc.
Add to this the improved viewfinder with its 1.05x magnification, which makes manual focusing easier and more accurate.
For users of legacy lenses these two improvements alone may be sufficient to justify upgrading to the K-3 Mark III!
Step 1: Prepare the Camera
Bring up the Custom Menu page 6 and:
a) Set Length Input on Startup to On
b) Set Using Aperture Ring to On
c) Set Aperture Info Record to On
Step 2: Set the Focusing Mode to MF (manual focus)
Step 3: Set the Exposure Mode to Av
Step 4: Set the ISO, or Set it to "ISO Auto"
Step 5: Mount the Lens
Step 6 (Optional): Enter the Focal Length on the Rear Monitor
Step 7: Set the Aperture on the Lens
Step 8 (Optional): Set the Aperture Value on the Camera
Step 9: Shoot and Enjoy
Compose the image, focus by turning the focusing ring on the lens, and press the shutter button!
Below is a sample photo (jpg out of camera, no post) shot with an SMC Pentax 28mm F3.5 lens at F11, ISO 200, center-weighted metering (multi-segment metering is not available with these lenses). The scene was shot at several F-stops from F3.5 to F22. Exposure was quite consistent across that range.
After a bit of a waiting period, the Pentax K-3 III is finally fully in stock in the US. Order yours today!