For slide film I would suggest you upgrade your Mark-I Eyeball Sunny 16 light meter (which is generally sufficiently accurate with negative) with Any Brand can Work SBC incident light meter. Your results will miraculously upgrade from pretty disastrous to pretty well exposed as well
Good advice. I intentionally have never used a meter when shooting this camera. I am trying to improve the Mark-I Eyeball. It was a bad idea to do it with Velvia, though.