http://www.digitalcamerareview.com/default.asp?newsID=5567&news=Olympus+m.zuiko+25mm+f1.8+lens

The Olympus M.Zuiko 25mm f/1.8 is undoubtedly a high quality lens with a tiny form factor. The resolution characteristic is very even across the relevant aperture range. The center quality is mostly excellent followed by a good to very good outer image region.

http://www.photozone.de/m43/886-oly25f18

You really love this lens, dont you VK?

http://www.lessgearmorephotos.com/olympus-25mm-f1-8-review/

This lens is HIGHLY underrated even though many think its a great lens. I bet if they stopped making them today people would be still be buying them at inflated prices in decades to come on Ebay. Olympus probably should give the PRO makeover and make it weather sealed.

If I had only one prime lens for micro thirds it would be the 25mm, it sits perfectly in the range to do anything. And I would choose it above many far more expensive manual lens for the M4/3 system.

Overview with samples

http://photodanielm.blogspot.com/2017/05/the-holy-classical-lens-olympus-m-zuiko.html

M.Zuiko 25mm f1.8 Black, $199

http://www.getolympus.com/us/en/outlet/m-zuiko-25mm-f1-8-black-reconditioned.html

Olympus 25mm f1.8 for $165

https://electronics.woot.com/offers/olympus-25mm-f1-8-interchangeable-lens