Excerpt: My primary weapon is my E-M1 with grip loaded with either the 12-40 F2.8 or my new behemoth 40-150 F2.8. But I also carry an E-M5 loaded with a prime lens for targets of opportunity at weddings and indoor events. For all things indoor natural light, this lens is my goto glass. The zoomies just can't touch the performance of a quality fast prime in these situations. I avoid flash in these situations every way I can so I can capture the ambience of the environment.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Rugged, Strong Construction, The Bomb
Excerpt: Perfect match to my Olympus E M5. Fast, accurate focus in high and low light. Clean, lovely images at all apertures. The Olympus lens stabilisation and the low light performance of the Summilux are a fantasy to this old shooter who grew up pushing Tri-X and shooting the Leica at 1/15. I'm confident getting detailed shots at 1/4, possibly lower. It is quiet, solid and, to these old hands, weighs nothing. What's not to love ?
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Lovely images, Nice Bokeh, Rugged
Excerpt: After purchased both LEICA 15mm and 42.5mm I thought I did complete the collection by getting a 25mm. My first impression was "where is the aperture ring?" I then realized that this lens has an older design so it doesn't have one. My unscientific tests show the image quality isn't as sharp as the other two lens at wild open and the color shifts from warm to cold from wild to narrow.
Pros: 30cm Min Focus Distance, Nice Bokeh
Cons: 03m Min Focus Distance, Color Shifting, Older Design, Slow Focus
Excerpt: I purchased this lens when I purchased a GH4 (see "The Mighty Mirrorless" review). I am glad to say that this is a great companion for the M4/3s GH4. From the photography side, this lens is very fast and very sharp. I have had several photographer friend that have made several positive comments on the speed and sharpness that this lens produces. Some of the comments even came from some FX camera shooters. Burst mode of this lens on the GH4 is insanely fast.
Pros: Compact, Fast / accurate auto-focus, Nice Bokeh, Rugged, Strong Construction, Very Sharp
Excerpt: All I can say is this lense takes the best images. You will not be disappointed. The focus ring is just so smooth, and the images it captures have such a beautiful quality. I really can't think of any negative thing about this lense. Buy it, you will love it too.