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Lets put it this way:
If the PL mount on your lens can be switched to EF mount and the lens will clear the mirror (clearing the mirror will assure clearing the SB glass) on a DSLR and cover full frame 24x36mm format it will work. But then again- why would you need PL SB- just put EF mount on your lens and use EF Speed mount....
I'm hoping someone can test the SLR Magic APO Hyperprimes with the SpeedMount and Epic-W.
Thanks Jacek for your perfect replies :) As Jacek explained, the image quality basically stays the same. If you leave the aperture settings on the lens the same, it might get slightly worse on the corners (depending on the lens), since you actually increase the f-stop. But, again, it might even increase the IQ based on the used lens. Brian Caldwell, the designer of the optics used in the SpeedMount, wrote a white paper answering lots of those questions. The same optical element that's used in the Metabones SpeedBooster Ultra is, in a modified version, also used in the SpeedMount, so you can use the widely available SpeedBooster Ultra tests to get an impression of the optical quality of the SpeedMount.
Concerning the "VV" look: using a focal length reducer (in our case with a x0.71 magnification) on a RED Dragon 6k will give you basically the exact same image compared to the same lens at the same T-stop on a RED Dragon VV, only that it's one stop faster (8k Dragon to 6k Draon is x0.75, 8k Dragon to 6k HD Dragon is x0.68 -> Big thank you to Phil Holland for his great PHFX formatCompare tool).
The Sigma 14mm and 135mm cover 8k Helium, the 20mm slightly vignettes at 8k. Didn't had a change to test the other Sigma Cine FF lenses yet. The Tokina VISTA 25mm also covers 8k Helium. I'll post test results with the missing focal lengths and other lenses, such as the Celere, and will update the SpeedMount lens sheet soon.
Here are three frames, shot nearly from the same position with the Canon EF 24-70mm f/2.8L II USM at 70mm f2.8 (Canon 5Dmk3 was slightly lower on the tripod). Both RED cameras and the Canon 5Dmk3 were set to 1/5000 exposure time. The RED frames are cropped to 7k to show the same image circle on the RED with SpeedMount as on the 5Dmk3. I changed the settings in RED Cine-X to better match the Canon look. You can also download the high resolution Canon and R3D file here.
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Thank you!!
That looks sublime ;-)
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