Hi all. I'm new to this forum. I'm planning on buying a olympus e-m5 mark ii. Besides the standard 12-50mm kit lens I'm planning of buying a prime lens in the 35-40mm full frame equivalent focal range. I saw the olympus 17mm 1.8 but also the cheaper panasonic 20mm 1.7. I found a lot of good reviews regarding the panasonic but also complaints regarding slow autofocus and banding problems on the previous olympus e-m5.
When I bought my first 17mm f/1.8, the image quality was a great disappointment compared to my 12mm f/2.0 so, I returned the lens. I was going to get a black Sigma 19mm f/2.8 DN but, it was backordered everywhere and after waiting three or four months, I bought another 17mm f/1.8. This one has been excellent in every way. I still think my 12mm is slightly better but, they are very close.
I considered the 20mm f1.7 because it's a nice focal length, not as narrow as the 25mm, which is a focal length I don't like, and easier to use than 17mm. But, after doing my due diligence and finding all of the complaints about this lens with plenty of real world examples to support those complaints, I decided not to get one.
Does anyone know if the panasonic 20mm 1.7 lens also has these problems on the new e-m5?
And is the olympus 17mm 1.8 really worth the extra money?
The 17mm costs a lot more because it has a metal body, versus plastic on the 20mm, blazing fast and accurate autofocus, and the AF/MF snap-back feature.
To me the real sleeper here is the Sigma 19mm f/2.8 DN. Just lokethe Sigma 30mm f/2.8 DN and 60mm f/2.8 DN, the 19mm provides sharp, corner to corner photos with excellent image quality, has excellent build quality with a metal mount and body, and comes with a hood and case. At less than $200, it's a real bargain. For the people who say but it's too slow, my answer is that it's just as fast as that slow 12-40mm f/2.8 Pro zoom everyone raves about.