Oconnor O-Box and Canon lens

[Eric J. Johnston]

Shawn with the assist!

Thanks-

 

[Vladimir Druts]

So to make this work you need the bellows, and the 114-110 ring from Oconnor right?

Hi Shawn,

Happy New Year to you!

The back of the O-Box has a 150mm opening which matches the outer diameter of the bellows ring. This bellows ring then can act as a third, rotatable filter stage via its 138mm round screw in filter retainer. The threaded aluminum ring facing the lens is 114mm. This is standard pitch threading for ARRI, Chrosziel and OConnor so rings are interconnectable. The 114mm to 110mm (threaded) step down ring can be used with the Chrosziel Flexi rings; they have a small and large one.

Great setup for still lenses; it's what I use on my own rig.

 

[Ned Wilson]

If you want to use an O'Box with Canon's definitely go with support rods. Canon lenses won't be able to handle the weight. For step down, I'd suggest using Chrosziel flex rings. The neoprene allows the Canon's to easily slide fore and aft.

That said, given the choice, I'd go with a light weight clip on instead. I mean really light. Take a look at Birns and Sawyer's clip on or movcam clip on. Both are good deals and incredibly light weight. The reason for clip on is to avoid vignetting and filter issues with the tromboning of Canon lenses.

 

[Naim Sutherland]

While I have used the 80mm piece for the Obox with Canon lenses and can attest that it fits awesomely and makes the rig look great, a $1 mouse pad will do the same job.

Having used both, I opted for the mouse pad and have been very happy with my decision. I cut it nicely and it looks fine on my rig. No one has ever said anything about it.

 

[Jay Kim]

I use Zacuto Universal donut and it works great too.
http://www.bhphotovideo.com/c/product/588997-REG/Zacuto_Z_UD_Z_UD_Universal_Donut.html
It needs 110-105 step-down ring so I use it with Chrosziel 110-105 ring.
http://www.bhphotovideo.com/c/product/367437-REG/Chrosziel_AC_410_48_410_48_110_105mm_Step_Down.html

Both together it is a little more expensive solution than Chrosziel Flex Ring but I can add a little more room in-front of a still prime lens (Leica-R) for a Oconnor Follow Focus. Otherwise, some still lenses have too short space from the focus ring to the lens front so attaching FF with mattebox is almost impossible.

 

[Carlos Castillo]

Hello Guys,

I need some help here, I just got my O-box whit this 19 mm adapters, but seems that is too low for the lenses. And I do not know what to do? please need some advice on what to get to make it work with 19mm studio rods, and not expend extra cash. Your advice would be so much appreciate it.

• 19mm LWS Rod Bracket
• OConnor - Studio Adapter (19mm)

 

[Jay Kim]

Carlos, can you show me some photos so I can identify the problem and possible solutions?

 

[Carlos Castillo]

Yes, I will post them right now.

 

[Carlos Castillo]

These are the images of the matte box, and I am using it with DSMC QUICK RELEASE PLATFORM PACK and MOUNTING PLATE (DSMC)

 

[Carlos Castillo]

Here are two more photos. Thank you.

 

[Jay Kim]

I see some problems there.

First, Oconnor Studio 19mm Adapter only works with Oconnor O-Grips rod bridge. Please check that you are using the correct parts.

Also any 15mm LWS to 19mm Studio adapter should work with Oconnor 15mm LWS bracket (which comes with the matte box) if the adapter follows the rod standards. The center of 15mm LWS rod to the center of 19mm rods should be 35mm apart. If that is correct, then you just need two short 15mm rods to fit them together.
That would be the most economic solution for your case.

 

[Med D]

A little off-topic here, but Carlos watch out for that OBox. I found out the hard way that the filter trays do not have a bottom stop. You can slide them in the top and the trays will come right out the bottom. I understand why they did this but IMO this is a very poor design. I'm modifying mine now to make sure that is not possible.

 

[Jay Kim]

A little off-topic here, but Carlos watch out for that OBox. I found out the hard way that the filter trays do not have a bottom stop. You can slide them in the top and the trays will come right out the bottom. I understand why they did this but IMO this is a very poor design. I'm modifying mine now to make sure that is not possible.

Very strange... Mine has pretty tight fit and also has filter tray lock screws to prevent that issue.

 

[Carlos Castillo]

Jay,

I found the problem, Thanks to Phil Holland, was an user problem and components that were use in the wrong way at the same time as you called above. Thank you so much.

Med,

Thank you as well for the heads up, I will pay attention to this when I am using it. If you could in the futre share your solution with it, would be great.

Have a great night.

 

[Abe Espinoza]

A little off topic, but does anyone have any info or a good contact at Oconnor in regards to parts/ repairs? One of the filter tray holder screws snapped on my O'box and need to get a replacement.

Thanks in advance.

Abe

 

[Jay Kim]

Your best contact would be Eric Johnston (eric.johnston@vitecgroup.com)

 

[Abe Espinoza]

Sweet!!! Thank you Jay!

 

[Med D]

Very strange... Mine has pretty tight fit and also has filter tray lock screws to prevent that issue.

Mine has both of those as well. If the lock screw is loose -- as it will be when inserting a frame -- then the screw is no help. There is also a fairly tight fit but with a filter loaded mine will fall straight through. Neither of these are positive locks to avoid a filter falling through.