Tuesday, March 03, 2020


Micro Four Thirds has a sensor that is about the same size as the old 110 film format. This is why I have an adaptor for the Pentax 110 lenses...

The Pentax 110 Auto SLR lenses are all f/2.8, because the lenses themselves have no built-in iris. The aperture blades in the camera are the same as the shutter; two L-shaped metal leaves that retract to make a diamond-shaped opening. If you use an adaptor to shoot these lenses on a MFT camera, you're always going to be shooting wide open.