I have had a 10.5mm for more than 10 years and just bought a Rokinon/Samyang 8mm and so far they have tested amazingly similar. I haven't tested for flair yet but did use the 8mm at the Dragon V2 unveiling last night and was surprised by the results. The only thing I don't like is the 8mm is difficult to focus. I find the 10.5mm easier to focus. the downside of the 8mm will be durability since it an all plastic body but the $214 I paid for the 8mm it's a pretty amazing lens.