Well I will wrap this month up now. I actually already do know that this lens would not handle firecrackers so well, so I just wanted to finish up with the shot that I did.
cosina 28 is a lens with not so much surprises. It is fun focal, can be quite creative too. I'm wishing that it was little wider or tighter, at times, but not so much. IF you desiere sharpness and depth'microcontrast' in shots, then this lens will fall short. It takes atleast f 11, to achieve edge to edge sharpness, but still it is not great, or good enough. Especially when shooting nature, and you wsh to see little details in branches, ect. Also colors and contrasts are lacking. ghosting, and flaring is bad too.
But, with FF you gain nice bokeh with this lens. It is reasonable sharp, ans focal lenght is quite nice. Wide, but not too wide, so there is not so big distortions, so you can have fun, and it will not look too weird. I actually had good time with this lens, wishing that It was little better(I have F28/2.8 So I'm quite well covered, still sighing after 31 thou). I can finally also say that this lens is holding me back. Can't really now a days say that with so many lenses, can you. All in all great fun, I have lot's of good shots, and had nice time with this tiny lens! if it was little more flare resistant and AF, it would be nearly perfect...it will go back on the shelf, just because it was one of first lenses that I'v bought so it has little more value to me. Oh, and now I know why I was not so fond of it back at the times with film. It kind a pronounces those things what I just said above, and with film you can't really do so much of experimenting, like you can with digital.
couple of shots that I liked most:
cheers, and happy 2018!!