I recently bought a Pentax 110 SLR camera and a selection of Pentax 110 lenses*.  The camera was made in the late 70s/early 80s, and was advertised as the world’s smallest interchangeable lens SLR system.  It was made for the 110 film size and 110 negatives are almost exactly the same size as the Four Thirds sensor in my Micro Four Thirds (MFT) cameras.  This means that the lenses behave on MFT cameras just as they would on the original Pentax 110 body.  All you need is a £20 Pentax 110 to MFT adapter. The lenses are all f2.8 aperture, are very small indeed!  Here’s the 24mm lens, the smallest,…