| Year | 1979 |
| Lens Groups | 3 |
| Lens Element | 5 |
| Aperature Blades | 6 |
| Minimum Aperture | f/32 |
| Closest Focusing | 0.45 m |
| Max. Magnifcation | 1:2 (0.5x) |
| Filter Size | 52 mm |
| Diameter x Length | 70.3 x 95 mm |
| Weight | 455 gr (1 lb) |
| Hood | BT-52 |
Images are Sharpe , dof is great , Bokeh is good , macro and 1-1 with 50mm extension tube is achievable.. great and Sharp as long lens. Really good alrounder .. paid about £140 feb 2018 UK eBay for Lens , 50mm extension tube and hood ... love this lens tested on both 6d and a7 ...IMAGES can be found on 500px guy Butterworth
This is a great entry level Macro lens that is affordable and common.
This is very sharp at most settings. Macro is a bit tough at F4 though as the difference in focus is great. It does have a hidden feature most people do not know about and that is the hard and loose focus modes on the focus ring. Pulling it back will cause a yellow ring to appear. This means it is on the hard focus mode which makes the focusing stiffer for better macro photography. Pushing it forward makes this line disappear making it on the loose mode. This makes it easier to focus for conventional use.
It does require a tube for the 1:1 ratio and it is hard to clean the front element as it is buried deep inside the body.
This is a great macro lens to keep a distance from and is quite affordable for most people to acquire.
Sample pictures using Sony NEX 5N:
https://www.facebook.com/media/set/?set=a.538594369514885.1073741828.352915654749425&type=1