Hi everyone, i've been wanting to purchase a new lens for a while now, the problem is, i'm not sure which one, i currently own the E-M5 Mk. II with the Oly 14-150 f4.0-5.6 II The problem i'm having with this zoom is that it is too slow, i often find myself in situations where my shutter speed has to go below 1/20 to get a properly exposed picture, but that does not allows for sharp, blur free pictures So i've been looking at other lenses to buy, there's a couple: Olympus 8mm f1.8 Olympus 12mm f2.0 Olympus 25mm f1.8 Olympus 50-200mm f2.8-3.5 SWD + MMF-3 adapter All of these have a problem though: The fisheye i would love for astrophotography, but apart from that, i'm not sure if i would use it often enough to justify the purchase. I've never shot fisheyes in the past either, i see quite a few stunning images with them, but i'm not sure if i can see these kind of shots when walking around :/ The problem with both the 12mm & 25mm is that they simply aren't weather sealed and i couldn't find much information on how well these handle harsh environments, are they okay with -20°C temperatures? can they handle a couple of rain drops? What about snow? The 12mm isn't exactly cheap either, so it worries me if i were to take them in harsh conditions Lastly, the four thirds lens, this one seems stellar from what i've read, although it is rather big, the relatively fast aperture for the zoom range is incredibly appealing and the sharpness seems to be up there with the Oly 75mm f1.8, the only problem with it on OM-D is focussing speed, although i've found that on the E-M1 it works pretty well, i wasn't able to find any information for its performance on the E-M5 II however, only on the E-M5, where there are a lot of complaints about terrible AF speed :/ What i also wonder with this lens, does it allow for peaking when using manual focus? (As in the MF assist feature automatically turning on when twisting the ring) What about the adapter? Apparently it's a really plastic-y build, how will it fair holding 1kilogram? Should i always hold it by the tripod collar, or can i still safely hold it by the camera when walking around? I do already kind of have the focal range of this lens with my 14-150 though, but it's just much faster (and if i'm at the 200mm end, i'm pretty sure i won't be indoors and thus should have enough light for a 3.5 aperture), so i suppose this one isn't an urgent purchase, but it is still one i am considering. As an extra note, i'm going up in the alps beginning next month and would like to purchase it before the end of March so i can take it with me, i think the Oly 8mm fisheye would be nice to take some action shots of skiers & snowboarders, but how will it fair for just landscape & mountain trails, and what about the city in the valley? Tough decisions >.< Any input is highly appreciated!