The Industar 50-2 f3.5, is a very small pancake M42 lens, its very small in size and with an M42-m43 adapter on my EPL5 is not bigger than the stock 14-42mm kit lens. It is a bit heavier since the Industar is metal. It is easy to focus through the back screen at least in adequate lighting. The changing of the aperture can be tricky if you haven’t used it again. Because the aperture ring is the threaded ring at the front of the lens and is relatively difficult to use without accidentally changing focus at the same time. It is a clumsy design. If any filters are used then they would effectively be threaded into the aperture ring, making it difficult to use a polarizing filter as the filter would be affected if either the aperture or focus is changed.
The m42-m43 adapter is a metal adapter that can be easily bought from eBay for 5usd.
Here are a few shots that i took yesterday.
Digital Film Revolution 