Upload & Sell: Off
Organic lens elements? Could you clarify on that point?
In my experience the build quality of the Samyang is okay when it comes to the outer appearances, but there are some flaws. First things first: The hood is awful, and becomes loose very quickly. I, like many others, bought a Nikon HN-20 knockoff metal hood to replace it. The knockoff hood is not perfect since it's a screw-on type, and can't be reverse-mounted for storage.
When I first got the lens the focusing action was quite stiff, but it loosened up with time. Now, after owning the lens for a year, I can feel that the grease in the helical has formed two surfaces: one on the helical and one on the inside of the focusing ring. When you apply enough force to the focusing ring the two surfaces kind of let go of each other and the ring moves with much less resistance. The focus damping is also a bit uneven, and turning the ring becomes heavier near MFD (which is understandable).
On my lens the front element also became loose and started to rattle, which was quite unnerving. It was an easy fix though, I just had to screw it back in to place. It seems it was not fastened with any glue, just by pressure. Image quality was still unaffected, even when the element was loose.
My lens also has a small flaw in the coating on the rear element, but it doesn't bother me since I've never seen any problems caused by it. The diaphragm blades don't stop down perfectly even, but that also belongs in the "who cares"-category.
Wow, that was a long list. Anyone want to buy a Samyang 85mm in mint condition? Just kidding, I would never sell it regardless of all its flaws.