As long as you understand the limitations of this lens before you buy it, you won't be disapointed. Realize that your getting a ton of reach 800mm, in a very compact form, for not very much money; so understand that image quality is not going to be that great. Also, when reviewing the images I posted, keep in mind this is my first day with this lens.
I posted some images, and they're all taken without a Tripod; but if your not using a tripod you will HAVE to be resting this lens against something. Hand holding (even with Steady Stock) is NOT an option. This really isn't as big of a hassle as people make it out to be, but keep in mind you'll still be throwing away a lot of images because of shake (even with Sony Steady Shot on and resting against something). At this reach you have to expect shake is going to be an issue, so I didn't mark down for this.
Focusing is hard only in the sense that it's hard to see perfect focus in the view finder. A split viewfinder designed for MF would probably be helpful here. You can tell some of my photos might be a little out of focus and that's only because I couldn't tell with just the plain viewfinder. This is an issue with any MF lens, and I was aware of it going in so I didn't mark down.
With any mirror lens bokeh is going to produce "doughnuts". None of my pictures show this very well, so be aware. You should already know about this since your looking at a mirror lens, so I didn't mark down for this either.
I rated 4/5 because of the T-mount (which is basically a screw on mount). The kit comes with an adapter, but the teleconverter is T-mount as well. I was hoping to be able to use the teleconverter on other alpha lenses, but that's not possible unless they're T-mount lenses. This isn't a huge thing, but it's a disapointment that wasn't made clear when I bought it.
The whole 800mm x2 Teleconverter = 1600mm works okay, but I don't know if I'll need that much reach. You have to remember that the longer the focal length, the more steady the camera needs to be. So I'd rather give up the 2x and a have 800mm that I don't have to steady as much, vs a 1600mm that would be unstable even on a tripod.
The Steady-stock is an interesting gizmoe, you won't be able to use it with the Rokinon 800mm because it's not stable enough, but it'll be a interesting gadget to try out when I'm using another lens.
Overall, a fun little kit. If your planning to go enter a bunch of photography contests, go spend >$2k super-telephoto lens that's about 3 feet long. IQ is quite poor but that's to be expected, which is why I rated 4/5. If you just want a cheap little lens, that you can actually fit into your bag; to give you some monster reach to have a little fun; this is the lens for you.
Read More Reviews on Rokinon 800mm Multi-Coated Mirror Lens with 2x Teleconverter (=1600mm) + Stedi-Stock Shoulder Brace Kit for Sony Alpha A900, A700, A350, A300, A200, A100 Digital SLR Cameras...
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