Fotasy FXME Auto Focus Marco Extension Tube 10mm 16mm 26mm for Fujifilm X Mount Camera X-Pro1 X-E1 X-E2 X-A1 X-M1 X-T1 This extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance. Getting closer has the effect of magnifying your subject. Designed with all the circuitry and mechanical coupling to maintain auto focus and auto exposure with Fuji FX mount lenses It comes as a set of 2 tubes of different lengths which singly or in combination on makes it usable in 3 different lengths, 10mm, 16mm, 26mm. Compatible with Fujifilm X Mount Camera X-Pro1 X-E1 X-E2 X-A1 X-M1 X-T1 Also compatible with Manual Lens, but Auto Focus Function will not supported.