A quick overview of this full-frame fish-eye (manual focus only!) can be found here
It sports 12 lenses in 9 groups and has nanocrystal anti-reflection coating. This should be very welcome as with fisheyes you normally cannot avoid to have lots of bright sky or even the sun in the image which makes any shot prone to flare and ghosting.
Another nifty feature of this lens is that you can remove the lens-shade. That makes it easier to clean the front-lens.
Pricing availability is still open, the person at the booth mumbled something about 500 EUR "but don't quote me on this". Availability was said to be end of year. That resonates with the copy at Photokina being dubbed a preproduction
model. So any shots done with that lens could be viewed with some skepticism. And they only had the version with Canon mount at their booth.
Samyang also sells under the Rokinon and Walimex brands.
One thing confuses me a bit: all sample images show a full-frame image (as opposed to a circular image) and Samyang says the angle of view is 180Â° in the diagonal
. Quote: "It offers the image area in 24 x 36mm format and the diagonal angle of view of 180 degrees". The non-circular lens-shade also indicates that the lens does not produce a circular image.
Nikon's own full-frame fish-eye has 16mm focal length and its 10.5mm fisheye produces a circular image. So I'm wondering what a 12mm focal length will really produce on a 24x36mm sensor.
With the missing Nikon-mount version i could not bring a test-shot with me but the personell at the booth confirmed the image to fill the entire full frame. but no explanation was given as to why Nikon produces a 16mm fish-eye that fill the full frame while Samyang can do this with 12mm focal length...//www