The Arri/ Zeiss Ultra Prime 8R lens used in the latest Ty Evans skateboard movie

[olika]

Hi guys,
just have new quest since yesterday.
I watched the latest Ty Evans skateboard movie (Ty Evans is a legend when it comes to action sport films, especially skateboard movies and always have a heavy load of crazy film gear and cutting edge technique)
In case you don`t know what i'm talking about you should check out the Flat earth trailer right here:
https://www.youtube.com/watch?v=I2vKd6FbXd8

In the movie there a plenty of incredible shots but i'm most hyped 'bout that crazy wideangle shots in there.
When you buy the full movie via itunes you also get a 20minute documentary about his filming gear which is pretty awesome to watch also.
After a little recherche i found out what lens he is using for the awesome wide angle view.
It's the The Arri/ Zeiss Ultra Prime 8R lens. As i only have minor film gear knowledge i never heard about such lenses before but you can see the resut here:
https://vimeo.com/79506918

The thing is and maybe you also recognize it in the results that those lenses aren`t just regular fisheye's,
hehe just google prices... it`s like 20-30K. Huh!
It's a wide angle lense without distortion, so... and thats my question how to achieve that?
I`m scratching my head how they achive that in real life but what itches me even more is how to re-create that in vray.

Whats your 2 cent about that?
Is a vrlens file needed? and naah i don`t that Ultra prime lens at my hands and probsbly never will...
Just counter act with distortion?
Somebody messed around with such stuff before? looking forward what your approach would be.
Thanks in advance

If you want to know about that check out those vids also:
https://www.youtube.com/watch?v=T64FhkxBq3o
https://www.youtube.com/watch?v=T64FhkxBq3o

The lens:
https://www.teltec.de/arri-k2-47613-...8r-t2-8-m.html

[kosso_olli]

The V-Ray lens analyzer tool is the way to go. However, you will need the lens you are talking about to recreate it. The workflow is described here: https://docs.chaosgroup.com/display/...+lens_analyzer
I think there will be no other very to correctly match the distortion.

[Neilg]

If you check this tool out - http://www.decarpentier.nl/downloads...ion-webgl.html
a cylindrical ratio of about 4 is your typical fisheye - lowering it gives you a quality only found in the best anamorphic/arri lenses. Having that control in vray would get us 90% of the way to recreating lenses like this.

[olika]

Thx for posting this Neilg ! It?s fun playing around with it
Could it be, that in theory, when you leave everything untouched (i mean distortion amount =0, no lensfile...) than it would be the "perfect lens" in reallife? Just lowering the focal lenght to 8-12mm?

[Neilg]

than it would be the "perfect lens" in reallife? Just lowering the focal lenght to 8-12mm?

No such thing as perfect - movies use lenses that are super wide yet pull the center closer. the distortion varies along the surface of the glass to compress most of the width into the very edges. they are absolutely the perfect lens for action movies.
no distortion does result in a perfectly flat lens, but there's usually a creative choice behind the lenses people choose to use and a flat lens at 8mm doesn't really have much character.

in theory this arri lens doesn't have any (or much) distortion so just set it to 8mm and see what happens, sure. There may be something else going on inside that cant be recreated easily.
I would like more distortion controls in vray - or maybe a standalone vrlens file generator that has a few different sliders and a preview of the resulting distortion so we can try and get close enough to something by eye.

[olika]

I have the same feeling, thats why i started the post actually,
just setting 8mm focal lenght is quite a different result (as you said not that much character) as what you can see when Ty Evans is following the skaters when they film a line with that lens.

+1 for that distortion control or tool, great idea btw!

[MANUEL_MOUSIOL]

Thats the first time I heard of the lens analysis tool and the lens files.
would be great to have a library of lens files, since I dont own enough interesting lens to make my own.
are there any for download somewhere?

[piotrus3333]

not quite Arri 8R but something fairly similar. 8mm might be pushing it a bit for this one but I use it sometimes for interiors with 10-12mm lens.
lens file: https://we.tl/gUa9WjSnMT

[olika]

piotrus3333 Awesome! Thank you, can't wait to play with it!

[piotrus3333]

feedback would be appreciated. thanks.
I was aiming to do a few profiles like that with different strenght of distortion but it just got lost in ?projects to pick up? box.

[olika]

...i was too late... would you mind uploading it again?
piotrus3333

[piotrus3333]

sure thing:
https://we.tl/bZSKY5G1I5

[olika]

taanx! piotrus3333

[M.Max]

not quite Arri 8R but something fairly similar. 8mm might be pushing it a bit for this one but I use it sometimes for interiors with 10-12mm lens.
lens file: https://we.tl/gUa9WjSnMT

This is very interesting!
Could you please re-upload this again?

[joconnell]

I've bought a laowa 10-18mm lens for a full frame sony a7rii and it's roughly that wide with a tiny amount of distortion - https://www.venuslens.net/ - they do a zero distortion 12mm for full frame but I went for the 10-18mm as it has adapters for nd filters which I want to shoot very high res hdr's with.