Over the course of this review, we've taken an in-depth look at the optical performance and handling of the Samyang 10mm F2.8 ED AS NCS CS ultra-wide prime lens. With its extreme field of view of 109.5°, this lens deserves extra recognition by the Pentax community, as it's the widest non-fisheye...

• +

  Widest rectilinear prime available for Pentax, Exceptionally sharp across the frame, Fast F2.8 aperture, Unobtrusive barrel distortion, Good contrast, Minimal chromatic aberrations, Resistant to ghosting, Nice starburst effect at night, Compact and easy to carry, Automatic aperture control (full P,...

• -

  Prominent vignetting at F2.8 and F3.5, Difficult to focus on nearby subjects through the viewfinder, Harsh bokeh / sub-optimal for close-ups, Not possible to use lens filters, Prone to harsh flare in strong, direct light, No in-camera lens corrections, Only 1 year of warranty in the US, Potential...

This manual focus wide angle lens for APS-C format cameras, offers a fast angle of view equivalent to a 15mm lens, with a relatively fast maximum aperture of f/2.8 for a budget launch price of around £429.

I like this lens a lot as an artistic tool. It is great for interior shots. Good for wide landscape, and adds a creative compositional view of close work. It is manual focus but the pentax lets you know when you have hit your mark. I usually use a tripod with this lens.

• +

  Good value, Great For Creative Work, Great For Interior Shots, Ultra Wide Field Of View

• -

  A Bit Large To Carry, Heavy

Although it's manual focus, if your using it as a landscape lens take the time to get exact focus because this lens is extremely sharp.. Not recommended for full frame cameras because of bad vignetting. Love it on the 7D2 though

This is a great ultra wide angle lens, feels very solid and pictures turn out very crisp. I currently use it on my d7100 and it works great!