This 55mm-Nik(Ai) mount Macro Lens Reverse Adapter Rings is threaded on one side to fit the filter thread of your lens, the other side is mounted onto the for Nikon F mount DSLR camera body.With the lens being reversed, it greatly increases the lens macro reproduction range capabilities, this saves your cost of buying an expensive macro lens for macro photography.

Steps of use:

1.Take out your lens from your camera body.

2.Mount the adapter ring to your camera body.

3.Reverse your lens with 55mm thread and screw it to the adapter ring until it is tight.

Note: Autofocus, automatic diaphragm (AE metering), and other functions dependent on communication between camera body and lens will be disrupted with this reverse ring mounting on the camera body.

To properly use this lens reverse adapter ring, you have to meet the below two conditions:

a.You have a for Nikon F mount DSLR camera,below are some of the Nikon F mount DSLR cameras for your reference:

Compatible with for Nikon camera D1,D1H,D1X,D2H,D2X,D2Hs,D2Xs,D3,D3X,D3s,D4,D100,D200,D300,D300S,D700,D800,D800E,D40,D50,D60,D70,D70S,D80,D40X,D90,D3000,D3100,D3200,D5000,D5100,D7000,Fuji S1,S2,S3,S5

b.You have a lens with 55mm filter thread, below are some of the lens 

Compatible with For Canon EF-M 55mm Lens:

EF-M 18-150mmf/3.5-6.3ISSTM.

EF-M 11-22mmf/4-5.6ISSTM.

Compatible with For Nikon 55mm Lens:

 AF-PDX Nikkor 18-55mmf/3.5-5.6G.

Compatible with For Sony 55mm Lens:

100mmf/2.8Macro(SAL100M 28).

35mmf/1.4G(SAL35F14G).

50mmf/1.4(SAL50F 14).

50mmf/2.8(SAL50M 28).

75-300mmf/4.5-5.6(SAL 75300),

85mmf/2.8SAM(SAL85F 28),

DT 18-55mmf/3.5-5.6SAMI(SAL 18552),

DT 18-70mmf/3.5-5.6(SAL 1870),

DT35mmf/1.8SAM(SAL35F 18),

DT 55-200mmf/4-5.6,

DT 55-200mmf/4-5.6SAM(SAL 55200-2),

FE 28-70mmf/3.5-5.6OSS(SEL 2870),

FE35mmF 1.8(SEL35F18F),

FE50mmf/2.8Macro(SEL50M 28),

Vario-Tess arT*E 16-70mmf/4ZAOSS,

Vario-Tess arT*E 16-70mmf/4ZAOSS(SEL1670Z) 55mm,

VCL-0630X,

Compatible with For Sigma 55mm Lens:

50-200mmf/4-5.6DCOSHSM,

45mmF 2.8DGDN,

MACRO50mmf/2.8EXDG,

55-200mmf/4-5.6DC,

Package:

55mm-Nik(Ai) Reverse Mount Ring x 1pcs

(Original Manufactory Package)