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View Full Version : Custom lens adapter with aperture control: Pentax 110 to Micro 4/3



Karl K
07-18-2013, 04:37 PM
The problem with 99% of the lens adapters made for the Pentax 110 lenses is that you can't control the f/stop. All exposures are made "wide-open", reducing resolution, depth-of-field and preventing complete control over exposure.

This custom adapter with variable aperture solves that problem to some extent by allowing some control over exposure when used with Panasonic and Oympus Micro 4/3 cameras.

This adapter is custom made, all metal, with a spring-loaded finger operated aperture contol arm (pictured in red).

Pentax lenses lock in securely and focus to infinity.

Depending on the model of your camera, the Pentax lenses may be used in Manual, Aperture Priority or Program modes.

$90 + $6 shipping

Karl K
07-20-2013, 11:04 AM
New photos of the adapter mounted on a Panasonic GF-1 both with and without a Pentax 18mm Wide-Angle lens have now been added.

Kindly excuse the quality of these iPhone photos.

Karl K
07-22-2013, 08:25 AM
The red aperture arm extends away from the base of the adapter's edge by 7/16".
I do not have an Olympus E-M5 with a battery grip to see if the arm would interfere with the grip.
If someone could do a measurement I would greatly appreciate knowing the answer.
Thanks.

Karl K
08-15-2013, 03:19 AM
sale pending

Karl K
09-15-2013, 04:46 PM
Sold.