Neewer Cell Phone Filter Kit  type_Remote Release which adds about 24cm of

which adds about 24cm of height

with a separate (and pretty well made) underwater housing indicated for use down to 30m (100ft)

and I'm not talking about that fancy premium plastic

These will fit any lens with a 52mm thread

Generic LTM-M adapter for 50mm lenses

Neewer Cell Phone Filter Kit &nbsptype_Remote Release which adds about 24cm ofA surprisingly decent filter kit that should fit most smartphones, consisting of a clamp on holder threaded for 67mm filters, plus a set of seven filters: a circular polarizer, four colour grad NDs, an ND filter, and a star filter and because the threading is a standard 67mm size, you can use it with any other appropriately sized filter. In excellent condition.