Lens Query

[Poi Boy]

I'd say wait till NAB unless you are buying inexpensive still lenses.
-A

[James T Mather]

Two last thoughts before I commit/ or not:

1. - Since the Red predominantly has a 35mm sensor as opposed to S35 (unless you want to go down the hugely unweildy RAW route - which I don't unless it is greatly simplified) - then what does it matter that the lenses may vignette a bit on S35? It won't effect your image - right or wrong?

2. - I hear the Zeiss t2.1's have a long back element and have trouble fitting on Old ARRI3 mk 2s (they press against the mirror or something) - what are the chances that this will happen with RedOne - making them unusable?

[Evin Grant]

Red has no mirrior, so no problem.

[Andrew M.]

UNVERIFIED
Flange to Misterium CMOS surface should be 52mm
Then there is cover glass probably .8 to 1mm thick and it is suspended .8 to 1mm above the CMOS surface. So subtract 2 mm
If there is less then 25mm distance from the CMOS surface to the back element of the lenses then I don’t think you can use it.

[James T Mather]

Great info! - Thanks a million Evin -

so, in the final analysis, you're saying that the max LENS depth from the back of the PL mount to the back element of the lens should be no deeper than

52mm - 27mm (Have I got this right?) = 25mm - and would probably need some additional clearance no? so 23mm would be around max?

Or have I got it all bass-ackwards?

Thanks a million for the feedback guys. Much appreciated.

[Andrew M.]

Great info! - Thanks a million Evin -

so, in the final analysis, you're saying that the max LENS depth from the back of the PL mount to the back element of the lens should be no deeper than

52mm - 27mm (Have I got this right?) = 25mm - and would probably need some additional clearance no? so 23mm would be around max?

Or have I got it all bass-ackwards?

Thanks a million for the feedback guys. Much appreciated.

Look here at the drawing on the page 14
http://www.arri.de/infodown/cam/broch/up_8r.pdf
You need about 23mm air space.

[Stephen Williams]

Look here at the drawing on the page 14
http://www.arri.de/infodown/cam/broch/up_8r.pdf
You need about 23mm air space.

Hi,

Only 13mm air space needed in the middle of the lens! Some lenses like the 16mm Zeiss go back a long way!

Stephen

[Andrew M.]

Hi,

Only 13mm air space needed in the middle of the lens! Some lenses like the 16mm Zeiss go back a long way!

Stephen

You don't want to shoot in to the sensor at more then 45deg at the corner.
Especially if you have 1mm or so glass, 1mm above it.
For 16 mm frame though you can go lower since the width of the window on the sensor that you will be using is smaller.
All depends from the back focal length or how they call it? Nodal point?
This is where beam of light coming out of the lenses has its pivotal point.
This beam you don’t want to shoot in to the sensor at sharp angles.
CMOS is not a film, may give you funny effect if you go to low.
But all have to be tried out, if lenses are designed for film then you have to try it on CMOS if you are too close to the CMOS surface with it.