Industar-69 28 2.8 is on camera lens and it was made for FSU Chaika-2 half-frame camera. Now they sell those lenses for cheap on-bay. Mine cost to me five dollars.
It works just fine on M8, but on M-E corners are blacked out. If you crop a little and proces little bit, it works 🙂
For me 28mm framelines of M-E are too wide to be used comfortably. It is perfect 35mm lens camera, in my opinion. 50mm framelines on M-E are cluttered with confusing 75mm framelines.