Wide conversion kit (PR-10)

0.78x wide lens plus the locking PR-12 adapter in one box, for a third of the Ricoh's price - and this adapter actually locks.

NiSi's answer to the GW-4 for IIIx owners, and the value play in this category: the lens and its adapter come together for well under half what the Ricoh lens alone costs. It takes the IIIx's 40mm to about 31mm. The adapter locks mechanically, which matters here - the recurring complaint about NiSi's older friction-fit adapters was them working loose, and this is the design that fixes it. Newer than the Ricoh option, so there is less long-term owner reporting behind it.

Some “Buy” links are affiliate links - as an Amazon Associate, RicohCookBook earns from qualifying purchases, at no extra cost to you. Not affiliated with or endorsed by Ricoh.