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Samyang 8/2.8 fisheye II image rendering

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eldonito View Drop Down
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Joined: 11 November 2006
Country: Sweden
Location: Norrköping
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Post Options Post Options   Quote eldonito Quote  Post ReplyReply Direct Link To This Post Topic: Samyang 8/2.8 fisheye II image rendering
    Posted: 20 September 2018 at 18:11
Dear Dyxum,

I am considering a move to E-mount, and I'm scouting lens options. I've a "lens fantasy league" spreadsheet and everything! The Samyang 8mm F2.8 UMC Fisheye II has got pretty good reviews and seems quite the bang for the buck.

My question to any owners out there is this: how well does it render spherical objects (like faces) near the edges of the frame? In other words, is it a "nice" fish-eye, where spherical objects remain circular all over the frame, or does it "cheat", compressing circles into ellipses near the edges?

I really liked my Pro-Optic (rebranded Samyang) 8/3.5 on A-mount, but I must've banged it up somehow because it's become really soft and won't focus well at infinity. Ken Rockwell described its superior geometric rendering properties in this article. I could get another one and adapt it, but I was wondering how the best-rated fish-eye for APS-C E-mount performed.

Thanks!

PS - Speaking of moves, I've just moved from California to Sweden! Family and career reasons. But I digress!
α77 | Σ10-20/4-5.6 VOL15/4 Rok16/2 Tam18-270 Min28/2 Min70-210/4 Cos100/3.5
X-H1 | Sam8/2.8 XF10-24/4 Sam12/2 Voi15/4.5 XF18/2 XF18-135 XF35/1.4 Hel58/2 Sam135/2
 



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eldonito View Drop Down
Senior Member
Senior Member

Joined: 11 November 2006
Country: Sweden
Location: Norrköping
Status: Offline
Posts: 701
Post Options Post Options   Quote eldonito Quote  Post ReplyReply Direct Link To This Post Posted: 10 January 2019 at 15:46
I moved to X-mount since posting this, but I just got the 8/2.8 so I can now answer my own question: the Samyang 8/2.8 fisheye II for mirrorless is not as good as the 8/3.5 SLR version as far as edge distortion goes.

See the globe near the left edge of the frame: it has been compressed into an ellipsoid:



The above was taken with a Fuji camera, but the same lens is also available on E-mount and I thought this info might be useful for mirrorless dyxumers.

With the SLR version, you could be confident to keep heads/faces and other spherical objects near the edge of the frame without them suffering too much squishing distortion.

As an example of a "better-rendering" fisheye lens, the image below was taken a few years back with my a77 + Pro-optic-branded 8/3.5:



Other than that, the 8/2.8 a great lens: pretty compact and nicely sharp across the frame.
α77 | Σ10-20/4-5.6 VOL15/4 Rok16/2 Tam18-270 Min28/2 Min70-210/4 Cos100/3.5
X-H1 | Sam8/2.8 XF10-24/4 Sam12/2 Voi15/4.5 XF18/2 XF18-135 XF35/1.4 Hel58/2 Sam135/2
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