Pixco Sony A Lens to Sony E Mount Camera Speed Booster Focal Reducer Lens Adapter

Why need to use speed booster/focal reducer adapter?
It converts full-frame lenses into APS-C lenses. The advantage is to get the full frame field of view onto the APS-C sensor.

Feature:
Increase exposure to 1 stop, and you can use a faster shutter speed to shoot an image. Works fine, closely combined with the bayonet smooth, like the original lens. Full manual operation, manual focus, manual iris adjustment can be achieved with body manual exposure, aperture priority exposure, combined infinite focus.

Specification:
Max. f-stop pass through: 1.4
Optical design (lenses / groups): 4/3
Focal length extension: 0.7x
Image diameter (mm): 28.5
Bayonet front: 135 full frame lens
Bayonet back: Sony NEX / Fuji X / Micro 4/3

Note:
You must set the camera to "Shooting without lens" mode to ON before use. Avoid direct shooting to light sources, or otherwise, blue spot occurs.

Compatible with:
Sony Minolta MA Lens
Sony NEX E Mount Camera
A7 III/A7R III/Alpha A9/Alpha 7R/Alpha 7/A7SII/A7II/
A6400/A6300/A5100/A6000/A5000/A7R/A7/A3000
NEX-7/NEX-6/NEX-5T/NEX-5R/NEX-5N/NEX-5/NEX-3N/NEX-F3/NEX-C3/NEX-3
(NOTE: Full-frame camera maybe have black-corners)

Package Include:
1 X speed booster/focal reducer lens adapter
1 X rear cap
1 X body cap