
Wonderful lens. It has a very solid build and design, I love the all metal design along with the very easy to read gauges. Focusing at infinity worked out of the box, no adjustment needed. This is a very wide angle lens, not a fisheye (it doesn't look like a GoPro). Produces ultra-clear images and straight horizons without looking too far. The f.2.4 aperture is great for indoors and use in low light conditions. All accessories are perfectly thought out. The lens case is ideal for travelers. It fits perfectly with my Canon 5D system. I would only go for the Blackstone if you are a professional shooter, they have a cheaper plastic version with exactly the same optics that would be a better solution for students and non-professionals. I would recommend this lens to serious and professional shooters.

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