Hans von Sonntag
Well-known member
Hi Hans
I know this is a little off topic, but why wouldnt a HD B4 lens not work on a Scarlet, sure they are designed to project onto a prism that splits the light onto the three seperate CCD's but that is in the camera. There is still an image coming out the back that is designed for a 2/3rds chip.
The B4 adapter in the Red shop was designed to spread the image over the 2k area of the Red Ones chip, But Scarlet is using a different chip with densor pixel spacing meaning we get 3k on a 2/3rd chip, something the Red Ones chip cant do. The original specification for the Scarlet 2/3rds had a B4 mount listed, although mention of all mounts now seems to have been removed it seems odd that you would have a B4 mount on a 2/3rds inch chip camera and not be able to take a B4 lens.
I may be misunderstanding the optics, maybe your right. I'd like to know for sure.
Red Ones B4 adapter wouldn't work, it would spread the image over to big an area meaning you would be effectively cropping your image severely, wouldnt it?
Now I'm really unsure!
Cheers
Hugh
Hi Hugh
I'm not a lens tech but if I recall right the B4 adapter is not only an extender that matches the 2/3 16:9 11.7mm x 6.6mm gate onto a S16 12.52 x 7.41 gate but also deals somehow with the fact that a prism is in the light's way. That must have some influence on the focal length.
FYI, the SI2K Mini is entirely - at least concerning the brain - a 2/3 Scarlet with lower specs but the same principle. 1 CMSO sensor, debayering etc.... If your read the specs and ask rental houses your will see that they rent it with PL or C-mount. No B4. However, the P&S IMS, availabe for the Si2K, does include a B4 adapter. A B4 lens will work somehow anyway. The question is: Will it resolve 3K? I'm pretty sure only expensive HD-glas will cope with Scarlet's performance. A high quality HD ENG zoom is over 25k. I guess you know that anyway.
Kind regards,
Hans