This MeiKe MK-S-AF-A Macro Extension Tube Set is designed specifically for Sony cameras, including 3 extension tubes - 13mm, 20mm, 36mm adapters, which can be used individually or in any combination to obtain the desired magnification. You may mount the tubes between lens and camera body to get your choice of macro ranges. There are totally 8 combinations.
Features:
AF extension tube set can transform customer's Sony lens into DSLR body
Moves lens from film or digital sensor
Closer focus is greater magnification
Extension tube does not affect image quality as there is no optics inside
In comparison, close up filter is often blamed for degrading quality of image
This tube set contains three piece tubes of various lengths such as  13/20/36mm, which can be used individually or in any combination to  obtain the desired magnification, total 7 various lengths
These extension tubes are designed with all the circuitry and mechanical  coupling to maintain auto focus and TTL auto exposure with most  Sony lenses, given there is enough light to activate the cameras AF  system properly

Specification:
Compatible with all for Sony Alpha/Minolta AF DSLR cameras
Materials: Metal
Advanced design
Smooth surface
Color:?Black
Package Includes:
Brand New Macro Extension Tube Set MK-S-AF-A x1
Front and Rear Caps x 1
English Manual x 1