I got an adapter to use Canon EF lenses on MFT (=Micro 4/3) . I’m not planning to use it much because it makes the lenses all manual and anyway, the idea with MFT was to have small and light lenses, not to drag along the heavy EF lenses plus adapter. But it could be fun for something… say for example, a 300/2.8 macro? Because that’s what the Sigma 150mm macro becomes on the small Olympus. 300mm certainly compensates for the small sensor so you get a wafer thin DOF.

There are two kinds of adapters available, a simple one which is only a lens mount which forces you to use the lens wide open unless the lens has mechanical aperture control. The second type of adapter has an aperture ring (this is the adapter I got) but I found that it vignettes quite extremely when stopped down. I’ve attached a straight-from-camera picture shot with the adapter at f8 and you can see that the corners are quite dark already but still fixable in post processing. At f11 the corners were almost black. So when you work with a 300mm macro, you really have to make the best of the short DOF because it’s not possible to increase DOF by stopping down. Today’s 365 is taken at f5.6.

Looking forward to the flower season to explore the world of 300/2.8 macro!