CHF101.–
Olympus EE-1 Dot Sight
Electronic viewfinder
Question about Olympus EE-1 Dot Sight
Does the part also work on a Sony /RIII?
Helpful answer
Yup, it's a stand-alone thing - I've got it on the 7Rm3.
I only know this with the OM-1, but according to the internet it should work with all camera brands.
https://www.youtube.com/watch
Should work, as it is model independent. Possibly check the OM System page. Great part for bird photography.