View Full Version : Minimum Focus Distance for RED Lenses
I Bloom
08-08-2007, 09:04 PM
Didn't come up with anything on the search feature:
Interested if there is any information out there on the minimum focal distances of various red lenses, in particular the primes.
Also while I'm at it, how difficult will it be to switch lense mounts?
IBloom
Edmund Boyle
08-09-2007, 05:36 AM
I'd be interested in this too and also the lens mount (canon)change times as I believe from a previous post that theres is a collimation/callibration process involved which I'm not technical savvy on at the moment.
How long does this take and do you have to do this once for the mount or repeat this step for each type of lens used thereafter?
Martin Drew
08-13-2007, 04:27 PM
The issues involved with changing the mount are unknown at present as no cameras have been released yet. There has been a lot of speculation but no facts yet. Will we need to wait until cameras are released to know for certain how simple/complicated it is. Not long to wait now though.
M
Michael Ragen
08-13-2007, 04:55 PM
I thought I read somewhere that the Red 18-50 cf lens could focus at 8 inches. Could have been a dream though.
Stephen Williams
08-14-2007, 02:33 AM
I'd be interested in this too and also the lens mount (canon)change times as I believe from a previous post that theres is a collimation/callibration process involved which I'm not technical savvy on at the moment.
How long does this take and do you have to do this once for the mount or repeat this step for each type of lens used thereafter?
Hi,
A Film tech will be able to swop & collimate a mount in 10-15 minutes, then it's correct until somebody plays with it, drops the camera or uses a heavy lens without any support! Still lenses should also be collimated, if they need to be ground down then expect it to take upto 1 hour per lens. Again they will stay correct until something unfortunate happens to them.
Stephen
PaulClements
08-14-2007, 04:34 AM
Hi Stephen,
I'm curious as to why a still lens would need to be collimated given the mounts will be produced to give the correct flange focal distance to the sensor.
A brand new lens that is theoretically without any faults should work fine on a nikon mount collimated on a RedOne should it not?
Cheers m8
Paul
Stephen Williams
08-14-2007, 11:28 AM
Hi Stephen,
I'm curious as to why a still lens would need to be collimated given the mounts will be produced to give the correct flange focal distance to the sensor.
A brand new lens that is theoretically without any faults should work fine on a nikon mount collimated on a RedOne should it not?
Cheers m8
Paul
Hi,
Nikon lenses don't leave the factory collimated to +/- 5 microns, that would cost far to much and has no advantage for still photography using an SLR. If you eye focus only with Red it's not a problem, but don't expect the markings to be accurate. (OK there aren't many markings so maybe it's a moot point)
Stephen
Craig Schober
08-14-2007, 12:11 PM
I thought I read somewhere that the Red 18-50 cf lens could focus at 8 inches. Could have been a dream though.
at this link, our very own gibby reported a focus marking on the lens as close as 8" but i'm not sure if it's final spec:
http://www.studiodaily.com/main/news/feed.rss/7959.html