Hasselnuts Upgraded Version (HN-10) for Hasselblad V-system/iPhone 4s, 5, 5s Optical system is updated from HN-10KS(Kickstarter model). Due to the update: Less vignetting, much better details. Synch shutter, Auto exposure, Live-view mode, etc... Compatible with Hasselblad V-system (except SWC series, recommended use with F2.8) iPhone compatibility: 4s, 5, 5srecommended use with iPhone5s, iOS8