Can you use lenses from an Olympus OM-20 SLR camera on any new digital SLR cameras?
While adapters to exist for Four thirds and micro four thirds, as well as Canon EF mounts, you will not have any autofocus (but the OM mount never had any autofocus in the first place) or open aperture metering. Now while it’s worthwhile adapting a 50mm f1.2 lens (a new one of those will set you back around £1000), theres little value adapting old zoom lenses thanks the the technology at the time, ditto goes for long telephoto primes for the purposes they’re used for really benefit from modern high speed autofocus and image stabilisation. So if you have 35mm, 50mm, 85mm, and 135mm primes (lenses that don’t zoom) it’s worthwhile looking at adapters for them. Zuiko lenses are generally pretty good, so if you’ve got those they’re worth having a crack at adaption.