The Fujifilm GF 55mm f/1.7 R WR is a fast standard prime for the GFX medium format system, announced on 12 September 2023 and released later that month. Equivalent to about 43mm on full frame, it was Fujifilm's second f/1.7 GF prime after the GF 80mm f/1.7 and slots in as the system's natural everyday lens, sitting between the compact GF 50mm f/3.5 and the older GF 63mm f/2.8.
It is built around 14 elements in 10 groups, including two aspherical and two ED elements, with an 11-blade rounded diaphragm. Autofocus uses a DC motor that Fujifilm describes as near silent, and the lens has an aperture ring plus weather sealing at nine points. Weight is 780 g, length 99.3mm, the filter thread is 77mm and minimum focus is 0.5 m. There is no optical stabilisation, so it depends on the IBIS fitted to most current GFX bodies.
Used buyers in the UK want it because it turns a GFX 100S or 100 II into a capable single-lens documentary camera, with a 43mm-equivalent view and depth of field close to f/1.3 in full-frame terms. Its rivals within the system are the GF 63mm f/2.8, which is far cheaper but slower, and the GF 80mm f/1.7 for tighter framing. With a UK launch price around £2,250, used copies at a sensible discount attract steady interest and around £12,000 of listings are currently live.
As a 2023 lens, most used copies are recent, so favour boxed examples with receipt for any remaining warranty. Check the aperture ring for even clicks and test AF for the slight hunting some owners report in low light, which is normal for the DC motor rather than a fault. Confirm the hood and both caps are present, and inspect the 77mm front thread for cross-threading from filter use. UK used prices typically run £1,500-1,900, so treat anything far below that with caution.