I've now owned the 30 and 60mm DN Art lenses. Prices are silly-good, image quality as good as I'll ever need. It seems like I've found the answer for budget primes.. But. Their stylish design has turned the entire barrel into a focus ring. My preferred settings include AF+MF shooting, and especially with the 60mm resting my left hand under the barrel has induced MF override more than once. In mid-composition I am suddenly looking at a zoomed-in, nicely-focused image instead of the whole picture (ePM2). Nearly every other lens has a spot on the lens where I can support the camera/lens but these Arts are made more for one-handers or AF-only shooters. Bummer. I can heartily recommend the Sigmas for image quality and price, but it seems the EX DN design was much better for the way I prefer to shoot. With all other lenses I really like my setup so it's disappointing that I will need to swap to other primes. I just thought I would pass this along for others who are seeking great primes at a nice price.