Olympus f/1.8: f/1.8, 1/15s, ISO400
So the lens showed up last week. I still haven’t had a lot of time with it, but I am enjoying the little I have had with it. It doesn’t seem quite up to the level of my other M.Zuiko primes, but it is noticeably better than the 17/2.8 that it replaced (say, 90% of the resolution of the 12/2, instead of maybe 75% of the resolution, which is what the 17/2.8 seemed like). Sharper at f/1.8 than the 17/2.8 was at its best aperture (which was about f/4.5). The little I have played with the 17/1.8, it seems sharpest around f/4-5. It seems that center sharpness doesn’t improve much stopped down from f/1.8, but 50% out to extreme corner sharpness and contrast does improve some (like maybe from G to VG level, where as center starts at VG+ and maybe moves up to EX-). Vignetting noticeable improves from f/1.8 to even just f/2, but especially by f/2.8. I’d guess there is at least 1.5 stops of vignetting wide open and at f/2.8 it seems closer to only half a stop.
Olympus 17mm f/1.8: f/2.2, 1/20s, ISO200
I’ve only had maybe an hour of running around with it on an overcast day indoors and outside.
I do love how incredibly fast it focuses and a real 46mm filter thread doesn’t hurt (its not much longer than the 17/2.8 was with a 37->46mm filter adapter mounted on it).
Olympus 17mm f/1.8: f/1.8, 1/80s, ISO800
One thing I did find while playing with it are two things. One, the eye cup on my E-M5 is cracked in two places, though it hasn’t fallen off yet. So new one ordered and I’ll slip that in to my camera bag until the old one DOES fall apart completely (I think it is because a few times recently I’ve grabbed the camera with my thumb under the eye cup and probably broke it that way). The second is, I REALLY needed to clean my sensor. I found a smudge on the bottom corner (after cleaning, I did notice that the corresponding reversed corner was slightly clearer, though only noticeable 50% enlargement). The “really needed to clean my sensor” was as a result of “being stupid”. Not mildly, but extremely. At my brother-in-laws wedding, the day after I was hanging out on the beach with a number of friends and relatives. Well, I had my camera along and was taking pictures. Did a lens change a couple of times and noticed on the final one that there were a few specs of dust/sand on the sensor which the sensor shake cleaning didn’t seem to be removing (I tried mounting the lens, turning on, back off and removing lens to check). So in my brilliant sun addled (there may have been ONE drink involved too) mind, why not blow them off myself? Of course being a silly human and not a sensor cleaning dry blower, I got bits of saliva on it.
Olympus 17mm f/1.8: f/1.8, 1/200s, ISO200
DOH! So then it was attempting to very, very, VERY gently and carefully clean it off with a clean and dry cotton T-shirt I happened to have with me, combined with and careful blowing on it to fog it up. I did manage to get it mostly cleaned, but I apparently missed a corner. I would have just shelved it, but I needed the camera for another 36 hours and there wasn’t a way to get alcohol swabs or anything else to do a proper cleaning that weekend. A few q-tips, some isopropyl alcohol and being super careful and the sensor is now extremely clean! Pocket rocket is getting packed from now on and no more using my own breath to blow off a sensor EVER. I’ll just live with some dust spots on the picture if I have to until I get back to my hotel room in the future and clean it off properly. That said, I am rather impressed with the sensor
Olympus 17mm f/1.8: f/4.5, 1/15s, ISO400