The JJC FDA-K1 includes a barrel, five adapters, a slide mount holder and a strip film holder.

The set is specially designed for negative copying and converts film to digital files. 

It can be used to photograph 35mm film and is compatible with the following select Canon, Nikon and Sony lenses1:
Canon EF 100mm f/2.8L Macro IS USM Lens [requires supplied Adapter 4# and Adapter 2# (2pcs)]
Canon RF 100mm f/2.8L Macro IS USM Lens (requires supplied Adapter 4# and Adapter 2#)
Canon EF-S 60mm f/2.8 USM Lens [requires supplied Adapter 2# (2pcs)]
Nikon AF Micro-NIKKOR 60mm f/2.8D Lens (requires supplied Adapter 3# and Adapter 2#)
Nikon NIKKOR Z MC 50mm f/2.8 Macro Lens (requires supplied Adapter 3#)
Nikon AF-S DX Micro NIKKOR 40mm f/2.8G Lens
Sony FE 50mm f/2.8 Macro Lens (requires supplied Adapter 5#)
Sony FE 90mm f/2.8 Macro G OSS Lens [requires supplied Adapter 3# and Adapter 2# (2pcs)]

The supplied adapters allow you to attach the set to different lenses and the angle of view and tilt can be adjusted by using the view angle adjustment ring on the barrel. Dedicated film holders for both film strips and mounted slides2 are included, as well, to help hold the film taut and to benefit handling. Beside that, the set is particularly well-suited for the Nikon D850 camera due to its dedicated Negative Digitizer mode and ability to automatically reverse colors in-camera to expedite the digitizing process. Additionally, it is recommended to use natural light or a light source with a high Ra (color rendering index)3 such as a light box or high-CRI fluorescent lamp when carrying on a negative copying. You can also use the set together with the JJC FDA-LED1 LED Light Set for Negative Copying4 (sold separately).

Product Highlights
Specially designed for negative copying
Converts film to digital files
For use with select Canon, Nikon and Sony lenses
Holds 35mm film strips and slides

Note:
1.It is recommended to select the image stabilizer switch of the lens to "OFF" when using the FDA-K1.
2.The slide mounts are not included.
3.When using an incandescent light source, keep the diffuser screen at least 30cm (1 ft.) from the bulb. If the adapter is placed too close to an incandescent bulb or left too long in its vicinity, the heat may damage the film or deform the holder.
4.Do NOT place the film in front of the turned-on LED light for a long time to avoid damage.

Package Includes
Barrel 1# x 1
52~52mm Adapter 2# x 2
62~52mm Adapter 3# x 1
67~52mm Adapter 4# x 1
55~52mm Adapter 5# x 1
Slide Mount Holder x 1
Strip Film Holder x 1

Instruction Manual x 1

( This is a machine translation. Please allow for possible misinterpretations in the text. )