Jump to content

Working with Canon 7D


Amando Crespo
 Share

Recommended Posts

  • Premium Members
I've done a few shoots with the 5D and the 1D and haven't had a problem with the Preston motor pushing the camera body around. 5D and 7D have a hole in the bottom for attaching the battery base--unfortunately in different positions on each, lovely. As indicated, manufacturers like Redrock do have plates that work with these.

 

I take it you mean a plate that works for both lens and camera, CP?

Link to comment
Share on other sites

  • Replies 59
  • Created
  • Last Reply

Top Posters In This Topic

  • Premium Members
I've done a few shoots with the 5D and the 1D and haven't had a problem with the Preston motor pushing the camera body around.

but you did use lens stiffening didn't you, or was the matte box enough? Depends on the setup/brand of course, but sometimes the matte box is attached to both the lens and rails really well. Sometimes not so much when using the Canon still lenses as most of this stuff isn't built for still lenses, but sometimes it works.... I suppose it also depends on the lens too, if it focuses like butta, then it may not be as much of a problem, especially if the lens is small...

Link to comment
Share on other sites

  • Premium Members

I used the DSLR Docu kit with quick release adapter and rail extensions last time I shot with the 5DMKII. Here it is:

 

http://store.zacuto.com/Zacuto-DSLR-Baseplate-Kits/

 

Production didn't have the foresight to get a lens support for the 70mm-200mm Canon L series telephoto, so I had to improvise with the Bartech rail bracket to provide some support. The length of the lens was too much for the camera body alone to support, and was causing jitter in the shot. Why they didn't ask for my input BEFOREHAND is beyond me. I guess they trusted Zacuto to send them everything they needed based on a 10min conversation about what camera they were using.

Link to comment
Share on other sites

  • Premium Members

Camera was screwed in via the standard tie-down point, no specific mating of lens and camera. Zeiss ZE's were used with no lens support and handled the torque of the Preston motor fine (I reduced the torque to the lowest level on the MDR). We also used some Canon lenses, both prime and zoom, only the heaviest with lens support and no serious issues. There was a tendency for the lens to shift in the mount when the motor changed direction which become more apparent at longer focal lengths, but the camera was not spun out of square in the mount under said torque. Maybe we just got lucky.

Link to comment
Share on other sites

  • 3 weeks later...
  • Premium Members

Just did a music video on the 7d. http://www.vimeo.com/7867769.

 

We built it up with set of old letus rods, redrock mattebox, bartech/m-one. Suprisingly I had no issues with the camera moving on the plate, as the rubber base on the camera seemed to grip on the letus plate nicely. http://www.letusdirect.com/cart/letus35-support-rods.html

 

I had to loop an hdmi cable around the gimbal, but fortunately had no issues with it getting it in the way.

http://www.flickr.com/photos/davidkruta/41...57622737211405/

One big issue I did have though, was using my 7 inch marshall monitor to take the hdmi signal. The signal kept cutting out if you even lightly bumped the connection to the camera body. Anyone else have this experience?

Link to comment
Share on other sites

  • Premium Members
Just did a music video on the 7d. http://www.vimeo.com/7867769.

 

We built it up with set of old letus rods, redrock mattebox, bartech/m-one. Suprisingly I had no issues with the camera moving on the plate, as the rubber base on the camera seemed to grip on the letus plate nicely. http://www.letusdirect.com/cart/letus35-support-rods.html

 

I had to loop an hdmi cable around the gimbal, but fortunately had no issues with it getting it in the way.

http://www.flickr.com/photos/davidkruta/41...57622737211405/

One big issue I did have though, was using my 7 inch marshall monitor to take the hdmi signal. The signal kept cutting out if you even lightly bumped the connection to the camera body. Anyone else have this experience?

Ok. Good.

But the problem is when you use a sled for big cameras with it arm.

With permission I upload your pict.

Best regards.

post-4379-1262136653_thumb.jpg

Link to comment
Share on other sites

  • 1 month later...
  • Premium Members

I don't get it. How do you get video out of this into your BNC monitor?

So what cable are you supposed to use to convert this image to BNC? Don't you need an HDMI to SDI converter box?

I guess both of those outputs are hi-def so is there an HDMI to SDI BNC cable that you send through a decimator? Is the smaller AV output standard def? Anybody have a link for a specific cable and/or HDMI converter box?

Link to comment
Share on other sites

  • Premium Members

If I'm understanding correctly, he used a Marshall HD monitor with HDMI input instead of the standard Flyer monitor (or even the HD Flyer monitor). Unable to go through the post with HDMI he had to run an HDMI cable down to the monitor. The connection not being super secure caused image loss at times.

 

If I'm understanding correctly. :)

Link to comment
Share on other sites

  • Premium Members

So my understanding is this: Unless you have an HDMI input on your monitor (which I believe very few of us have), you would need to get your hands on one of these Blackmagic HDMI to SDI converters:

 

http://www.bhphotovideo.com/c/product/6208...er_HDMI_to.html

 

I can't seem to find a cable that runs from the Canon 7D to an SDI BNC connector on a monitor. Can anybody clarify this?

Link to comment
Share on other sites

yes the vidoe output connection is quite flakey and i often get signal loss.

 

I have a little bar bolted to my manfrotto 501 plate that the camera sits on

 

this..

 

stops the camera spinning

 

stops one bumping the HDMI so often (not while operating of course!)

 

not shown in this image but im now putting a rubber band round the bar and the HDMI lead

 

Less dropped vision.

 

I will get some proper ones made in due course

 

S

 

3.jpg

Edited by Sam Morgan Moore
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share


×
×
  • Create New...