[77 mm (Front)] Love this lens for landscape photography. Fun to use and quick. A bit heavy but definitely worth it

[Canon EF-M] I use this on my canon 70d for landscape and night pictures and I am very happy with the purchase of this lens. Landscape pictures come out beautiful but this lens shines when used for night & astrophotography! Well worth the investment!

[Canon EF-M] Shoots very clean and sharp images from corner to corner. A very good buy for the money. Initially, I was not sure about this lens upon recieving it. I couln't seem to get accurate focus regardless of proper manual focus technique. Turns out, my photo review software in the computer was the problem. Once I viewed the images in other software, the images were very crisp and impressive. Well worth the buy.

[APS-C] There has been a lot of talk about a lack of wide-angle (16-18mm) primes for APS-C. It seems all the wide-angle lenses for APS are zooms, and most are F/3.5 or slower. This is my fourth Samyang lens. Samyang produces lenses that have exceptional optics (if you can get a good copy), but are much cheaper than the big name-brands, albeit with manual focus only. However, this lens is unique. Nobody else makes wide angle primes for APS. What really surprised me were the optics wide open. At F/2, there is almost no chromatic aberration (other than easily corrected lateral CA that all wide-angles seem to have). All my other fast glass (F/2 or faster) have lots of longitudinal chromatic aberration that degrades the view, especially in the out-of-focus areas. This lens is almost completely free of this aberration. There are few lenses I have used that are F/2 and faster where F/2 is almost as good as F/5.6. This is one of them. The edges aren't perfect at F/2, but the next fastest 16mm lens is the Tokina 11-16mm, after that, they're all F/3.5 or slower. I used to own the Tokina 11-16mm, and it had significant field curvature at 16mm that this lens lacks. Optically, this lens is better at F/2 than the Tokina was at F/4. Great lens, but a specialized item. One of the best F/2 or faster lenses I've used. For those who care about full-frame equivalency, this will yield photos similar to a 24mm F/2.8 on full-frame.

[f/2] I use the lens for landscape photography, including panoramic photos. The images I have taken have been very good, although I have not done any quantitative measurements. Manual operation has not been a problem for my applications. Construction seem to be very good, with a good feel. I have not found any problems with the lens during my use.

[Manual Focus] An excellent lens, with great image quality. Very sharp at the widest aperture, which is a huge pro, comparing to other wide-angle lenses. The manual focusing brings a lot of challenges to the autofocus accustomed users; it was indeed a challenge to me, especially focusing at infinity; but with a little practice I managed to nail it. The only con I found was that the lens is very tough to attach. However, this doesn't affect in any way the image quality, so I give this lens 5 stars.

[Manual Focus] I've had this lens for over 6 months and it provides great image quality even wide open, stopping down to 2.8 or 4 is ideal. It is fast enough to be useful in almost any lighting situation, and the focal length is as close enough to a 35mm(On MFT) to be just about right for you wide angle applications. The price makes it ideal for the independent filmmaker. The build quality is also fantastic. I flubbed up once and dropped it from a messenger bag at my waist and the thing just bounced away without a scratch. I just wish I got the cine version so I don't have to bother with follow focus adapters.

[Canon EF-M] Hey, this is a great wide angle lens.


Works great with my Canon, and it allowing me to take my landscape pictures to the next level.

[f/22] What do I have to say... I love that lens! I've had it for about a year now, and it's a great lens. It's very sharp, even at f/2 (the corners get sharper as you stop down, but even at f/2, they're pretty good!), it's well built, it feels nice and solid, the focus ring dampening is really good. There's some vignetting, but it's nothing terrible, and the distortion isn't bad either. You have to watch out for flare, thought. If you're using it for night photography, it can be worth bringing black cardboard and tape to make a bigger lens hood. In most situations the provided lens hood is enough, but if you're doing a long exposure, or star trails, over time, the rays of light coming from street lights and lit signs can kinda cumulate and show in the final result, so be mindful of that. Besides that, I think it's a really good lens. Not for those who need small a small lens with AF, but if you need optical and build quality, the Samyang/Rokinon 16mm f/2 is a lens of choice.

[APS-C] I bought this lens mainly for night sky photography- and it's doing an amazing job! Even at f2 the center is incredible sharp (but the edges are a bit blurry) and it great to photograp the Milkyway. I also use it for landscape photos during the day at f5.6-11.... it's extremly sharp (even the edges are incredible sharp). Overall- if you don't want to spend $1000+ this is probably one of the best fast APSC Wide Angle lenses. I can recommend it to everybody who is intrested in a good wide angle lens and doesn't want to spend too much money!