Samyang ultra-telephoto 800mm f/8.0 Mirror T-Mount Lens (White) is a tremendous addition to your camera bag, opening up unimagined and powerful photographic possibilities. It's a wonderful lens for those starting to shoot wildlife or sports and thanks to its affordability, a great lens to round out your kit, offering you ultra-telephoto power if and when you may need it. Lightweight (33 oz. / 946g) and compact (5.68"/14.45 cm long), it can focus as close as 11' (3.5m) and its aperture is fixed at f/8.0. This manual focus lens is constructed from fully multi-coated low-dispersion optical glass with a 105mm front filter thread and 30.5mm rear filter thread. A T-ring adapter (available separately) is required to mount this lens to a camera body.
Reviewed by 1 customers
I want to put this lens in perspective. Look around the Adorama site for an 800mm lenses and you'll find some nice ones for $6,000-$15,000. You'll also find this one for less than $200. There are real reasons for the price difference. Don't have high expectations, have some fun with it, and you'll do OK with this lens. The lens is lightweight as all mirror lenses are. If you shoot in B&W there are threads for 30.5mm filters on the back of the lens (closest to the camera). Build quality is better than I expected for $200. Focusing is not easy due to the shallow depth of field (eg, roughly 1/2"@20ft, 4"@50ft for APS-C). Don't even think about using this lens on a camera that doesn't have some manual focusing aid like magnified view or focus peaking. Take your time focusing with this lens. Image sharpness is fair when viewed at "internet size", poor when viewed at 100% (aka, pixel-peeping). Image contrast and color are good straight out of camera. I haven't seen any CA (aka color fringing) at all and I'm told this is a characteristic of mirror lenses. Bokeh has the very odd "donut" shapes that people either hate or are indifferent about. Choose your composition so the background is far away and the donuts will go away. A tripod collar DOES NOT come with this lens. Adorama needs to change this in the "Tech Specs" tab. I've added some example photos below (straight out of camera, no post-processing at all).