Kenko DG extension tube set for Micro Four Thirds finger grip The QR system base attaches

The QR system base attaches via either 1/4" or 3/8" inner threads

But if you're looking for a camera that you can focus manually

Optics are pretty decent for a lens of this age

800mm at f5

Kenko DG extension tube set for Micro Four Thirds finger grip The QR system base attachesThis Kenko DG extension tube set includes 10mm and 16mm tubes which can be used together or separately to provide substantial close up capability with most Micro Four Thirds lenses (sold separately). Full electronic passthrough means that manual focus and exposure functions are preserved; autofocus function may vary based on lighting conditions. In excellent condition.