GH5 GH5S & Rokinon Cine DS 10mm w/ Speedbooster

D

DeadEyesSmiling

Well-known member
Hey, y'all. Any help on this would be most appreciated, my headspace is maxed out.

I'm wanting to know if the Rokinon Cine DS 10mm with the Ultra 0.71x Speedbooster will work with the DCI aspect on the GH5S. The information I'm finding online is contradictory at best.

All of the info I've found about the GH5S sensor says it requires a lens with at least a 30.5mm image circle (LINK).

I've found information that says the 10mm has an image circle of 28.37mm (LINK), so that definitely shouldn't work. But I've also found info (LINK) that says the 10mm will work on the Dragon 6K sensor, which has an image circle requirement of 32.2 - 34.55mm (LINK).

But then (THIS) YouTube video shows the 10mm doesn't work with the 6K FF, but will work with the 5K crop, which has an image circle requirement of 28.9mm.

So, I'm confused. Does anyone have any additional insight or even this configuration that could test for me?

-DES
 
It has been my experience, that ultra wide angle lenses like the 10mm, do not work well with a Speed Booster. I think you will be pushing it to try this setup on the GH5S, which has a much wider sensor than the other GH cameras, or even the AF100.

The SB is going to reduce the Rock 10mm projected image circle to about 20mm, which is not going to cover the GH5S sensor at any aspect ratio, except for 1:1. The GH5S needs at least a 21mm image circle for minimum coverage from what I have been able to determine, and 22mm would be better. Tests with the Sigma 18-35 with both SBs, showed vignetting at 18mm on the GH5S in DCS 17:9 aspect ratio.
Cheers
 
Last edited:
You must log in or register to reply here.
Back
Top