What you think about this lense?

Rokinon 35mm F/1.4 AS UMC Wide Angle Lens for Nikon with Automatic Chip RK35MAF-N

Never heard of it, which isn't a good sign. How about a link to it and telling us what camera you want it for?

In my view, Rokinon is a bottom feeder. You would be far better off assuming you have a Nikon APS-C DSLR (D3xxx, D5xxx, etc) to buy the Nikon 35mm f/1.8. There's not a lot of difference between f/1.4 and f/1.8 (2/3rds stop), so you won't see a lot of difference in DoF, especially at 35mm.

And the Rokinon is a manual focus lens.

Given the Nikon AF-S 35mm f/1.8 is under $200, it is a great lens at a bargain. You may wonder why the Rokinon is more expensive… It is because of the f/1.4, which is really not much of a difference, as I said - especially at the shorter focal lengths such as 35mm.

And if you consider the Nikon 35mm f/1.4 is $1,800, you can see what the extra costs are for 2.3rds stop, and when you consider it costs $1,800 to make such a lens, then the Rokinon is really an inexpensive version. To me, inexpensive means junk - to others it may mean other things.

To add to the above - this lens won't autofocus, and 35mm is NOT a wideangle lens on a cropped sensor.

You evidently bought into the DIgital Single Lens Reflex type camera. Buying the camera with the usual short 28-55mm lens is your cheapest part of the DSLR lifestyle. Be prepared to spend at least what you did for the camera and basic lens for each additional lens. This is why I call this type camera a money pit. If you had the expereince to earn or at least learn to earn from your camera, a DSLR is certainly justified. But other wise few people make 11x14 & 16x20 size prints enough to warrant the investment that DSLR photography takes.

In a nutshell, what I'm getting at is that, it makes no sense to buy a DSLR and then look for cheap lenses! Look for expensive lenses on sale, or used in "mint" condition makes sense!

It is only a wide angle lens if your Nikon is a full frame camera like the D610, D700, D800, D3 or D4

Adding that lens to a cropped frame Nikon will give you what is considered to be a "normal" lens with the same angle of view as a 50 mm lens on a 35 mm or full frame Nikon

The Brands like the Rokinon and others are very inexpensive lenses, so they are popular for those who do not what to invest a lot of money in their hobby or want a lens that they will rarely use like a fisheye, so a large investment will not pay for itself over the years.

If you want a prime, wide angle lens, your only choice is the Nikkor 14 mm. All the other wide angle lenses are zoom lenses like the 10-24 mm, 12-24 mm and 14-24 mm. Any zoom lens that starts with 18 mm is usually wide enough for most budding photographers

Here is a link that will help you understand what various focal length lenses "see"

http://imaging.nikon.com/.../index.htm

The Rokinon 35mm f/1.4 is an excellent lens made by Samyang in Korea. It has tested very high and very sharp on Photozone.de, and they commented that it is equal to the Nikon equivalent, and better then the Canon equivalent. The Nikon and Canon equivalent are near $2000.

The Samyang lenses are also sold under various names, like Vivitar, Falcon, Rokinon, Walimex, Bower, Opteka, Polar and Pro-Optic.

Canon Test:
http://www.photozone.de/...35f14eosff

Nikon Test:
http://www.photozone.de/...yang3514fx

The lens does not auto focus, and may not have aperture control (it might in Pentax K mount).

The problem is that Sigma released their 35mm f/1.4 A lens which is even better then all three lenses mentioned, and has auto focus, and is only a couple of hundred dollars more then the Rokinon.

Why buy the Rokinon, get the Sigma.