Mattebox that connects to lens, to allow zooming?

[Faymus Media]

So i purchased this mattebox with my kit for my canon 7d:

http://www.thecinecity.com/eshop/product.php?productid=61&cat=26&page=1

It is a great matte box, however if i want to zoom in and out with video its a pain, i have to move the mattebox forward on the rails and then adjust the lens. I currently have a lens filter ND filter that rotates and adjusts, so i was able to NOT use a rubber donut on the end and just zoom through the box.

However, if i buy 4x4 ND filters that will eliminate that possibility. is there a mattebox that i can buy that screws on the end of the lens hood? I found this, i am not sure if i read it correctly if that is what it does, like the mattebox can snap or screw on with an adapter and i would be able to zoom in and out because the mattebox would have no rail lock and move with the lens.

Here is the on i think might do that:


105mm PROAIM MB-700 Jumbo Matte Box with Side & French Flags for 5d markII dv hdv Beta Cameras



If you guys know of any others let me know.

thanks

 

[tired]

I bought a lens mount mattebox some time ago (can't remember the brand) but can't zoom smoothly anyway - think about the weight on the end of the lens, unless it's feather light you'll end up with a jerky zoom and may well damage the lens over time. Rails aren't just a place to put the mattebox - they support the weight.

 

[Faymus Media]

I bought a lens mount mattebox some time ago (can't remember the brand) but can't zoom smoothly anyway - think about the weight on the end of the lens, unless it's feather light you'll end up with a jerky zoom and may well damage the lens over time. Rails aren't just a place to put the mattebox - they support the weight.

So pretty much with matte box there is no zooming while recording?

 

[cordvision]

Not all lenses extend or have a rotating front element when zooming. You could use a clip-on matte box if your lens and mount can support the weight. You will probably need something like this (I make them) to attach it: http://www.cordvision.com/lens-upgrades/

 

[Gabel]

You could also get this:
http://www.sgpro.co.uk/products/cinebox/cinebox unit/cineboxunit_frame.html

 

[tired]

not that I've tried - a terrible shuddering effect!

I do remember seeing a DIY adaption for a mattebox to make it into a swing away - youtube I think

 

[Dstar]

Anyone tried the Jag35 mattebox on their Panny yet?