Canon has used diffractive optics technology in this lens to enable a compact ... of Micro Four Thirds for telephoto work, it’s this hugely popular 100-300mm zoom. One of Panasonic’s earliest ...

OM System has lenses across wide-angle, standard, and telephoto zoom ... The lineup lacks some common options, like a 300mm f/2.8 lens, but those may not be necessary considering Panasonic's ...