| Year | - |
| Lens Groups | 4 |
| Lens Element | 5 |
| Aperature Blades | - |
| Minimum Aperture | - |
| Closest Focusing | 0. m |
| Max. Magnifcation | 1:1 (1.x) |
| Filter Size | 62 mm |
| Diameter x Length | - |
| Weight | 312 gr (0.69 lb) |
| Hood | - |
This lens produces very sharp images on both the Sony A7s and a6500, especially in the centre. The edges aren't as good, but for macro work shot at f8 and smaller that's not a problem as the lens is sharp across the frame at that aperture. It's a versatile lens as it can be used as both a macro and a standard walk-around lens. It's bulky but pretty light.
My biggest gripe is usability at 1:1. At that magnification the front of the lens is so close to the subject that it's really only good for static objects. I might actually prefer shooting this lens at 1:2 because of that.
Check out my review of the lens with lots of image samples at http://www.theweekendlens.com/vivitar-55-f28-macro.html
An excellent macro lens that has a wider maximum aperture than the Canon FD counterparts and reaches 1:1 without needing any extension tubes. Sharpness and contrast are superb, but the focus ring has a very long travel so it takes a lot of work to refocus from infinity to 1:1 macro (and vice versa). The diaphragm only closes down to f16 which limits your ability somewhat to maximize depth of focus without sacrificing sharpness. Build quality is excellent and construction appears to be all metal including the diaphragm ring. The front element is very deeply recessed, which removes the need for a hood but on the other hand significantly reduces the effective working distance at maximum magnification.
I like this better for real macro work since it goes 1:1 mag without tubes. No hood need with this one. A hair less contrast than the Canon macro but just as sharp except at infinity where the Canon was better. A lot less expensive than the Canon so good bang for the buck.