Shift7 wrote in post #17018832
David and Invetalon, why you think 14L II is good lens? Many people trash it like no one ..
It is undoubtedly one of the most unfairly disparaged lenses, but I think the reason all stems from the Samyang, which is both dirt cheap and sharper. Brand new, the 14L II is very expensive. However, I've always been skeptical about the actual sharpness of the Samyang because it's very distorted and correcting the distortion in post is going to take a toll on the sharpness of the final image. The 14L II is very well rectified - better than any other 14mm lens - including the Nikon 14-24mm. Anyway, I just think the Samyang worked as a spoiler to the 14L II.
Those who only consider sharpness and cost in their lens evaluations have voiced - rather loudly - that the Samyang is the obvious choice and that buying the 14L II is crazy-stupid. However, I took a long long look poring over hundreds of image samples (here at POTN as well as on Flickr) and considered color rendition, contrast, distortion, etc. And I came to the opposite conclusion: the 14L II was, to me, the superior product.
So, it may not be quite as sharp as the cheap Samyang, but it is plenty sharp. It is as sharp as the highly esteemed TS-E 17mm (I still own the TS-E 17mm, but had them at the same time), and it's very well-corrected for distortion, CA, etc.
It's true that AF is not a particularly needed thing for a 14mm lens, but it sure is nice. And that's another nicety the Samyang doesn't offer.
Why did I sell mine if I love it so much? Just came down to usability. Frankly it is a really challenging focal length to use. The 114 degree field of view is huge and finding suitable subjects for a 14mm lens is more challenging than longer focal lengths. I loved having it, but just didn't give it the amount of use I feel a lens needs to have to stay in my bag.
Here is a sample shot at f/2.8, yet it is already quite sharp...and check out that color rendition: 

IMAGE LINK: https://www.flickr.com/photos/camp_arbo/8669392289/
Dark Shadows [Explored]
by
David Arbogast
, on Flickr
To counter my positive statements above, I'll also say this: That's the same price for a brand new EF 16-35mm f/4L IS USM. I probably will buy that lens eventually, and likely won't ever re-buy the 14mm (which makes me sad); although I would be very very tempted by that price. Going with the 16-35mm f/4L zoom just means I will use it more because of the zoom flexibility.