The correct useage,connect with a lens adapter and mount a manual lens on the adapter,the following sample is connecting a Canon FD lens to NEX mount adapter and M42 lens to NEX adapter. Macro Extension Tube For SONY E-mount.
eBay
Meike MK-P-AF3B Auto Focus Macro Extension Tube Ring Kit for Panasonic Olympus M4/3 M43 MFT Mount Mirrorless Camera
Aliexpress UK
A good alternative to macro lenses for amateur and professional photographers who want to try macro shooting. Transform your Lens into a Macro Lens. 3 EXTENSION TUBES(10mm, 16mm, 21mm). 1x extension tube Ring.
eBay
Andoer Portable Auto Focus AF Macro Extension Tube Adapter Ring Replacement for Canon 60D 7D 5D II 550D EOS EF EF-S Mount Lens
Aliexpress UK
When using the extension tubes alone: 10mm or 16mm, or use them in combination : 10mm+16mm=26mm, the focal length of lens should be greater than the length of the tube. Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance.
eBay
JJC X Mount Macro Extension Tube Kit Close Up Auto Focus Adapter Ring for Fujifilm X-S20 XT5 XT4 XT3 XT30II XT30 X-H2 X-H2S X-E4
Aliexpress UK
- You are bidding a new tube set (combined with 5 pcs). - High quality metal aluminum made. - Use this extension tube can optain very good quality macro shoot with your lens, Quality must better then use close up filter. - Exposure has to be adjusted manually. Aperture control is not available if you use those Auto focus lens which does not allow you to manually adjust the aperture (without an aperture ring). You can change aperture for those old manual lens.
eBay
Mcoplus Metal Auto Focus Macro Extension Tube Ring for Canon RF Mount EOS R100 R Ra RP R3 R5 R5c R6 R6II R7 R8 R10 R50 Camera
Aliexpress UK
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 while maintaining its original optical quality.
eBay
m65-m65x1mm 6/8/17/27/30/36/58mm Macro Extension Tube ring Adapte For 65mm Screw Mount Digital SLR Camera Lens
Aliexpress UK
Auto focus macro extension tube for Sony NEX x 1. Suitable for automatic focusing with TTL mode. It takes around 5 to 10 working. (It may take longer for different countries).
eBay
For Canon EF EF-S Macro Lens Extension Mount Extender Tube Replacement Accessory
Aliexpress UK
Macro Extension Tube Ring only, other accessories demo in the picture is not included! This extension tube does not affect for image quality as there is no optics inside. The farther away the lens is, the closer the for focus, the greater the magnification.
eBay
Fotga Macro Extension Tube 3 Ring Set for Pentax K Mount Kx Km K10D K20D K100D K200D K7 K-3 K5 DSLR &SLR Camera Lens
Aliexpress UK
Compatibility: Best suited for lenses with a focal length greater than the tube length, ensuring optimal performance in macro photography applications. - Versatile Adapter Set: Includes two extension rings of varying lengths which can be used individually or combined (10mm + 16mm = 26mm) for flexible shooting options.
eBay
Meike X-Mount Auto Fucus Macro Extension Tube Ring for Fujifilm X-E4 X-H1 X-Pro3 X-S10 X-T4 X-T10 X-T20 X-T30 XT30II X-T200 X-H2
Aliexpress UK