sorry, haven't had much chance to play with the 15mm, borrowed it at Chiff for a short while to try out.. happy that not much vignetting, a potential nice next purchase, i suppose :)
p'haps one day the future firmware has a setting for the 15mm..
testing m240...
m240 + lux 24mm by joshlty, on Flickr
m240 + lux 24mm by joshlty, on Flickr
m240 + lux 24mm by joshlty, on Flickr
m240 + heliar 15mm by joshlty, on Flickr
m240 + lux 50mm by joshlty, on Flickr