Rokinon/Samyang 8mm f/2.8 fisheye does Caribbean Sailing Festival

Started Feb 3, 2013 | Discussions thread
phodopus
Junior MemberPosts: 45Gear list
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Re: I like Rokinon's stereographic projection ...
In reply to flint-hill, 7 months ago

Rokinon uses stereographic projection which is something of a compromise between equisolid and rectilinear projections. A stereographic projection preserves neither areas nor straight lines. Rather, it preserves angles. Two scene lines intersecting at a given angle will intersect at the same angle on the sensor, no matter where they are in the frame. (It's a conformal mapping.)

I find stereographic projection quite pleasing as a compromise between fisheye and rectilinear projections. It responds particularly well to partial defishing in postprocessing. Its disadvantage is that it's supposed to be costly to implement. Evidently Rokinon has found a workaround.

Here's a review of the Rokinon 8mm f/3.5 that addresses some of these issues. (That's not the same lens used in the OP, but it uses the same projection.)

http://www.lenstip.com/index.html?test=obiektywu&test_ob=160

Yes, all Rokinon/Samyang fisheye lens have very pleasant projection, good for full or partial defishing. You can also have a look at these examples:

http://defish.software/index.php?n=Main.Examples

There is not a profile for Rokinon 8/2.8, but 8/3.5 profile works very well

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