Samyang/Rokinon 8 mm f/3.5 Aspherical IF MC Fish-eye

hey guys, I bought the Rokinon 8mm 3.5 fisheye FE8M-C on Amazon. is this the same one u guys are using? Whats the difference between the EF and the IF?

ccdinh wrote in post #16883803
hey guys, I bought the Rokinon 8mm 3.5 fisheye FE8M-C on Amazon. is this the same one u guys are using? Whats the difference between the EF and the IF?

Some are using the same model as your's, which is an older model (gold colored band) with the fixed hood. The newer model (red colored band. HD8M-C) has a removable hood where this is mainly designed for full frame sensors as to lessen vignetting. It also costs more, on average. Newer model still functions great on a crop sensor.

EF means Canon's mount.

^^^
Nice! Was this person holding a bright light or firing off a flash?

CameraMan wrote in post #16931209
^^^
Nice! Was this person holding a bright light or firing off a flash?

thanks! he had a flashlight and sorta made a sweep with it from left to right

Heres the Thames from waterloo.

Great lens btw

IMAGE LINK: https://flic.kr/p/ntrb​wQ

For kicks put the Rok 8mm on the 6D for this little timelapse in the backyard:
https://www.flickr.com …icineman4040/14​213667746/

"De-Fishing" the Rokinon 8mm Fisheye

The Rokinon responds well to "de-fishing". I used default processing with DxO v9 on the first image. For the second I added barrel-distortion correction, also with DxO v9. I cropped both images vertically because I wanted a wide panoramic effect.

The de-fished image lost some horizontal coverage and also shows some sharpness loss at the edges. But for my needs, I consider the results quite good.

As I seem to be allowed only two images per post, I will post separately a similar shot with my 10-22mm EFS.

"De-fishing" the Rokinon 8mm Fisheye, part 2

Here is a comparison shot with the two fisheye shots I already posted. I shot it with my Canon 10-22mm lens at 10mm.

Hello folks. I'm new to this thread and forums.
I just received my Rokinon 8mm (HD8M-C) today and proceeded to take a few sample shots of some scenery. I started out with f8 (in AV mode) and set the focus to infinity as the scenery was actually across the lake. (it was sunny so my speed was way up there, like 1/3200 or so)
I got nothing but soft images. What I am seeing on this thread are nothing but tack sharp images.
I did some Googling before coming here and read that those lens may not be factory calibrated. Might this be the case? I find it hard to believe that they would send out non-calibrated lens in this day and age.
Thanks in advance for any possible help you could provide. I hope this is something easily correctable before having to send it back (to B&H).

You should use the Hyperfocal:
http://www.dofmaster.c​om/hyperfocal.html

Randoo53 wrote in post #16941405
Hello folks. I'm new to this thread and forums.
I just received my Rokinon 8mm (HD8M-C) today and proceeded to take a few sample shots of some scenery. I started out with f8 (in AV mode) and set the focus to infinity as the scenery was actually across the lake. (it was sunny so my speed was way up there, like 1/3200 or so)
I got nothing but soft images. What I am seeing on this thread are nothing but tack sharp images.
I did some Googling before coming here and read that those lens may not be factory calibrated. Might this be the case? I find it hard to believe that they would send out non-calibrated lens in this day and age.
Thanks in advance for any possible help you could provide. I hope this is something easily correctable before having to send it back (to B&H).

I bought the Opteka 6.5mm Fisheye a few months ago and finally got around to calibrating the focus on it. I did a series of test shots and found that when the focus was set to 1.2ft my subject 10ft away was in focus. The main reason I calibrated the focus was because when I set the focus to 1ft my actual minimum focus was 2-3 feet away. I hoped that adjusting the focus would give me a better minimum focus distance. This is important because the fun fisheye effect gets more exaggerated the closer the subject is. Also, I would be able to accurately use hyper focal distance calculations.

I'm now happy to say that my focus dial is spot on after following the steps described here:
http://www.focusonnewf​oundland.com/section48​8880.html

It was pretty easy to do and totally worth it in my opinion. I can now use the distance dial to set the actual focus and I can focus as near as 1ft. The set screws are tiny so I had to dremmel a razor blade in to shape to use as a screw driver.

Entrance to Ljubljana's central cemetery

IMAGE LINK: https://flic.kr/p/nVwx​81

IMAGE LINK: https://flic.kr/p/nF5D​TJ