Name: Rokinon 20mm f/1.8 ED AS UMC Wide Angle Lens for Pentax K Mount
Brand: Rokinon
SKU: RK20WAPNK
Price: 599.00 USD
Availability: Discontinued
Rating: 4.67 (9 reviews)

Rokinon 20mm f/1.8 ED AS UMC Wide Angle Lens for Pentax K Mount

Rokinon 20mm f/1.8

Rokinon

Adorama

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Rokinon 20mm f/1.8 

Top Rated Gear: Rokinon 20mm f/1.8 ED AS UMC Wide Angle Lens for Pentax K Mount Color: Black, Compatibility: Pentax K-1, Pentax K-1 Mark II

The Robinin 20mm F1.8 Wide Angle Lens is its newest, full frame compatible wide angle prime lens. Its bright F1.8 aperture secures a fast shutter speed, even under restricted lighting conditions. It creates outstanding bokeh by highlighting the main object effectively. The lens utilizes Ultra Multi Coating (UMC), two aspherical lenses (AS) and three extra-low dispersion (ED) to minimize aberration and unnecessary light dispersion. The lens comes complete with front and rear lens caps, lens hood, lens pouch, instruction manual and 1 year Robinin warranty.

Needs a little cleanup for chromatic aberration, more for vignette. Overall, excellent, even at f/1.8.

Excellent Astro Lens

I can't tell you how often I use this lens, great for landscape/astro.

clean prime

Only used it a few times but seems quite sharp for a cheaper lens.  Should work well for landscape astrophotography which is the main purpose I bought it for.

Good lens so far

This lens has good image quality and seems well built. It feels slightly large on a mirrorless camera and could be a little wider; but for the price, it's great.

Great Manual Focus Lens

LOVE LOVE LOVE  this lens.  It’s sharp and takes some amazing shots when paired with the Sony A7III

Love it

The price/performance ratio of this lens is impressive; extremely sharp, very low distortion, and chromatic aberrations are well-controlled (what there is can easily be removed with software).  I don't consider the fact that it's not AF to be a disadvantage.  This isn't the focal length I would use when aiming for blurrred backgrounds, but the bokeh looked pretty good in the couple of test shots I took.

Amazing bargain

I had been looking for a wide angle prime lens for some time and finally got this lens when it went on sale.  I am very satisfied with it.  Good wide open and gets better as you stop it down a bit.  As a long time SLR and now DSLR user manual focus is not an issue for me.  Contrast is a bit low but easily fixed in post processing.   All in all a very good lens for the money.

i have attached a few photos I took at a local park when I first got the lens.

Very good lens

I bought this lens for video. Specifically I was looking for a fast, lightweight, wide-angle that I could mount on an A7SII and fly it on a one-hand gimbal (Zhiyun Crane) in combination with an A7SII... this lens meets all the requirements. It has a long, very smooth focus throw which is perfect for manual focusing (especially when shooting wide open on a full frame sensor). Used in combination with Sony's clear image zoom this lens functions as 20-40mm, an excellent focal range for the type of run-and-gun video shooting that I do.

Great lens for gimbal use

So far, the Rokinon 20mm lens has proved to be a good performer on my full frame DSLR.  It's slightly soft wide open, but it sharpens up quickly and displays no bad behavior.  It is surprisingly good optically for being such a fast piece of glass.  While manual focus can slow down the task of photography, the camera's focus confirmation light works well.  The only knock on the lens is that the 77mm filter size does vignette slightly unless a thin filter is used.