Originally posted by WheresWaldo Except in this case this particular lens is identical, except in the Vivitar livery where some of the cosmetics are different (red stripe instead of gold, red paint-fill instead of orange, no gold nameplate versus nameplate). That is why I asked specifically for this lens combination.
Originally posted by stevebrot I second the notion that these are all just the same Samyang in different livery. A person should be able to go to a single place to get all reviews on this lens.
Steve
The Bower/Polar/Rokinon/Opteka should go together as one then, but the Vivitar should be separate, as it's the one different one. Let's not forget the Phoenix/Tokina/Vivitar/Cosina lenses that came out in the past decade (i.e. the 19-35mm, the 100-300mm, the 100mm f3.5 macro). They are all identical lenses, except for outer cosmetic tweaks, yet different test results can be found from brand to brand. For instance, photodo gave the Cosina 19-35mm a 3.1 rating while the Vivitar only scored a 2.9. The Cosina 100mm macro got a 2.8 score, yet the Vivitar scored 3.2. The Cosina 100-300 scored a 2 while the Vivitar version scored a 1.8. All these versions are closer to being identical than the Vivitar 85mm is with the 4 other brandings.
Outer tweakings, badgings, and possibly different glass sources can clearly affect lens performance. I know with the 85mm, it's a bit different because they are just about 100% identical except for the name on the gold nameplate, but I wouldn't start a trend of grouping lenses together because as in the situation I referenced, different brands can mean different results.
I will agree that the Bower/Polar/Rokinon/Opteka can remain as one under miscellaneous brands, but the Vivitar version should definitely be separate under Vivitar.