No Focus Hook?

[Roger Singh]

I noticed from this photo that the camera's focus mark doesn't stick out for the tape measure to hook on to it.

http://web.mac.com/mikedcurtis/iWeb/HD4NDs_Image_Galleries/RedAccessoriesNAB07_files/slideshow.html?slideIndex=2

I'm just wondering if this is the final layout of the camera? A focus hook would be much appreciated.

[Andreas Fernbrant]

Actually there are hooks.
You can see them in the photos over att www.red.com

[sander kamp]

AFAIK there are no photos of the camera on the RED website. Only 3D renders and in the mean time lots of details have changed.

[Zk2007]

I'm sure they will put a hook on there. It's mandatory for any 35mm camera and RED is a 35mm frame camera.

[Roger Singh]

Right, the photos on red.com are 3D renders, but Andreas, along with the actual photo of the camera, the 3D renders don't have focus hooks on them.

I also don't want to assume that focus hooks will be on the production model, when they didn't put it on the pre-production for the NAB show. So I had to ask.

[Seth Larney]

Hey guys,

Not sute if this helps, but I'm positive I heard either Graham or Stuart mention that this will definitely be a feature (recently). Unless I'm seriously mistaken.
________
CMX450C (http://www.cyclechaos.com/wiki/Honda_CMX450C)

[Andreas Fernbrant]

I was under the impression that these hooks was there for the tape mesure.

[Finner]

Andreas those are to tighten and lossen the PL mount.

I also did not see a tape measure hook but forgot to ask someone about it. I am sure they will throw one on the focus plane before production begins. A hook on both the top of the camera and the dummy side is very helpful.

[Jeff Kilgroe]

Maybe I'm being brain-dead about this, but would the focus point change depending on which lens mount is in place? Or is it always based off of the sensor plane?

[Roger Singh]

Focus will always be based off the sensor plane.


*EDIT*

Oh I misread,

i am not sure if there is a focus adjustment if there is a different mount on it.

[Seth Larney]

Jeff, the focus distance is always measured from the sensor/film plane.

Cheers,
Seth

[garageman]

No matter what mount is on the camera, the light must always end up on the sensor plane, therefore that is where focus is always measued from.

[Brook Willard]

All I want on the camera is a witness mark around the sensor plane and a small screw hole on the top and sides of the camera for screwing in a hook/peg. That way you have four different ways... one that's always there and three are removable. Depending on your accessory collection, you could remove or install pegs as required.

[Jeff Kilgroe]

Jeff, the focus distance is always measured from the sensor/film plane.

OK, thanks. That's what I was thinking, but I wasn't sure.

[Larry McKee]

Focus would always be on the sensor regardless of the mount. Different mounts have different focal plane distances, but they all will focus on the sensor.

[Evin Grant]

I know they used taped mesurements for Crossing the line so there must have been some sort of hook on the cameras.

[Larry McKee]

There was a witness mark on the side of Boris, so I'm sure a hook will be provided on the production models.

[Eirik Tyrihjel]

I know they used taped mesurements for Crossing the line so there must have been some sort of hook on the cameras.

not necessarily, it would be fairly easy to add one yourslef, but I would definetly prefer for it to be there...

[Finner]

not necessarily, it would be fairly easy to add one yourslef, but I would definetly prefer for it to be there...

I've done this before with cameras with broken or no hooks. You just slap a hunk of velcro on the focus plane and some on your soft tape and your good to go. When I pulled focus I use to put a little velcro behind every hook anyway because it helped keep my tape end on. I read a few years ago that the guy who invented velcro sold the patent for around a million dollars. In a world where velcro is everywhere tell me he doesn't kick his ass daily.

[Jeff Kilgroe]

I read a few years ago that the guy who invented velcro sold the patent for around a million dollars. In a world where velcro is everywhere tell me he doesn't kick his ass daily.

Not true. Hook and loop fabrics were invented in 1941 by Georges DeMestral. He dubbed it "Velcro". The trademark and patents on "Velcro" are still held today by his company - VELCRO, which now holds tons of other patents and trademarks for various fasteners and friction and adhesive products. The technical patent on Velcro hook and loop fabric has long expired, but obviously the Velcro company still holds trademark on the name.

You could be thinking of that stupid movie "Garden State" where Zach Braff's character invents "silent velcro" and sells it to the US military for $1M.... Hehe.

[Chris Burket]

The focal plane is not always at the same place. It can depend on the lenses and camera. PL mount cameras with super 35 sensors/film will always measure from the plane of the chip/film. However, with 2/3 inch HD cameras, the focal plane changes depending on the lense mounted. Most ENG lenses actually measure from the front element. Fujinon primes measure from the focal plane, as well as their cine style zooms. Zeiss digiprimes actually measure from slightly in front of the focal plane marked on the camera. They usually supply a sticker to mark this on the camera.

EDIT: This actually makes me wonder where you would measure B4 mount lenses (on the adapter) from when mounted on the RED. Would be an interesting thing to test.

[Paul Leeming]

Ah yes, the joys of learning about back focus the hard way after doing a one day shoot using the JVC GY-HD101E and finding out 90% of the footage was out of focus.... :)

[Dave Kudrowitz]

I started a thread in another forum regarding the flange depth and back focus before seeing this one here.
On this subjest, it is standard rental house procedure to measure the depth of the flange on film cameras, collimate the film plane and the ground glass to assure that every properly collimated lens will work on the camera. How will the RED sensor be measured and collimated to assure that all the different types of lenses and adapters we put on it will have correct back focus? Sure we can adjust the back focus of most b4 lenses with external adjustment features, but doing that with cine lenses is a very different procedure. introduce mount adapters and you have more back focus issues. Sure eye focus is focus, but if we are taping and pulling focus cine style its different all together.
My original question is; is there a way to adjust the sensor or mount depth/collimation in the RED? Is it set at 52mm like an Arriflex? If not, how will this affect using a cine lens from Chicago collimated to Arri standard, with your RED camera from New York?