Samyang 8mm F2.8

Hello,
Hope I'm not too off topic as this is technically not an ef or eos lens but that is why I'm here. I have noticed in the description that this lens http://www.amazon.com …-28FE8BK-SE/dp/B0086UXT9K was designed for APS-C sensors. That being said, does anyone know if I can adapt this to an EOS body without any negative side effects? I like the idea of having an F2.8 fisheye, but I can live with the f3.5 version if it comes down to it.

Heya,

Oops, sorry, was looking at 14mm.

Is the difference between f2.8 and f3.5 really that big for you? It was for me, so I'm asking.

Very best,

well f2.8 is alot faster in the dark but other than that, no. But if I can adapt and focus properly the f2.8, then I will role with that. Im wondering if it would give me focus problems because it;s designed for mirrorless dslrs

The Roki 8mm FE comes in a Canon EOS mount. It's meant for crop bodies (APS-C). You can mount it on a full frame, but it's like shooting through a pipe. You get a round circle image. If you buy the Canon mount version, you won't need an adapter.

This lens really shines at f8. Set it to f8, set the focus on the lens indicator just shy of infinity, and fire away. Everything in the frame will be in focus. If you're looking for speed, go for the 14mm f2.8. The 8mm FE is pretty soft wide open (f3.5) and really only gets sharp at f5.6 or f8.

i don't think you can adapt a sony nex lens to EF mount...i think you may be able to go the other way, not that that'll help though

if you want speed i'd avoid the 14mm f2.8, in my opinion it's really more suited for FF cameras...you can go for a tokina 11-16mm f2.8 if you want wide and fast

calypsob wrote in post #16537370
well f2.8 is alot faster in the dark but other than that, no. But if I can adapt and focus properly the f2.8, then I will role with that. Im wondering if it would give me focus problems because it;s designed for mirrorless dslrs

Heya,

I find that f2.8 isn't that much faster than f3.5, it's not even a full stop. But what it does do, which is why I use f2.8 lens over f3.5+ for my night shots, is because it's enough of a small stop difference to reduce ISO by a stop and still get enough light while keeping noise significantly lower. The result means shorter exposures for tight focuses and less ISO for less noise. Makes a difference for milkyway, stars, etc. At least for me it does. But that single fraction of a stop makes a difference going from ISO 12800 to ISO 6400 for example, for single frame exposures. Different if stacking of course, but I prefer not to stack and work with singular images.

Try out the 14mm f2.8. It really is a phenomenal lens for sky/stars/milkyway, and day time landscape and all. It's super wide on full frame, and still plenty wide on a crop. Fisheye looks weird anyways ().

Very best,