matte box question at DVinfo.net

Go Back   DV Info Net > JVC ProHD & MPEG2 Camera Systems > JVC GY-HD Series Camera Systems

JVC GY-HD Series Camera Systems
GY-HD 100 & 200 series ProHD HDV camcorders & decks.


Reply
 
Thread Tools Search this Thread
Old November 9th, 2006, 09:12 PM   #1
Major Player
 
Join Date: May 2006
Location: Boston, Massachusetts
Posts: 425
matte box question

Not sure which forum is best for this.

I just bought a matte box for my JVC HD 100UA. When I put the adapter ring on, I see the edges of the adapter ring in the corners of the frame. If I zoom in, I don't see it, but I'd like to be able to zoom out all the way.

I haven't used a mattebox before, but is this normal? I left a message for the manufacturer, but I was hoping to get an unbiased opinion.
Dennis Stevens is offline   Reply With Quote
Old November 10th, 2006, 01:54 AM   #2
Major Player
 
Join Date: Oct 2004
Posts: 180
Dennis, what you're experiencing is a called "vignetting" where the matte box actually blocks off part of the visable area of the image. I don't know the specifics of your set-up, but its just a matter how far the ring extends in front of the lens, and the angle of view your lens has at full wide. What I'd suggest you do is make some kind of colored ring that is easy to see in your view finder, and is just a little bigger than the diameter of the lens. Then just have someone move the ring over your lens, in and out, so that you can determine the exact point where it is no longer visable. This will at least let you know where you need to be with your adapter ring in order for it not to cut off your frame edges, and you should be able to tell if just a little adjustment will solve your problem, or if you are just going to have to live with zooming in a little bit when you use your matte box.
Cal Johnson is offline   Reply With Quote
Old November 10th, 2006, 07:52 AM   #3
Major Player
 
Join Date: May 2006
Location: Boston, Massachusetts
Posts: 425
Thanks CJ.

Is this normal for a matte box? I was considering just sending it back and getting a different model.

I don't want to bad mouth anyone, but it's one of the cheaper matte boxes. So I was wondering if this was a case of 'I paid less, and I got less'.

But if it's a typical issue with matte box use, then so be it.
Dennis Stevens is offline   Reply With Quote
Old November 10th, 2006, 03:01 PM   #4
Major Player
 
Join Date: Oct 2004
Posts: 180
Well, its not necessarily "normal", but its not uncommon. That's why I was suggesting doing the test, so you could see how far you need to be able to move the matte box back, closer to the camera, to be out of shot. If you're just a fraction of a ways off, then you might want to look at other systems, but if you've got a couple inches that you're going to have to move back, then you might be a bit stuck with it. However, another factor is the size of the matte box. The larger it is, the further away from the edges of the frame it will be, and thus less likely to be in shot. But in your case its the adapter ring that's causing the issue, so its tough. You'd really need to see the adapter ring for a different system before you'd be able to judge wether or not you're going to have the same problem. I know in film school we ran into this problem occasionally when using zoom lenses with our film cameras, and we just pushed in a little. I've got a matte box on the way though, and I too would hope that its not visible a full wide. What matte box did you order? I got the Cavision 16x9.
Cal Johnson is offline   Reply With Quote
Old November 10th, 2006, 03:35 PM   #5
Major Player
 
Join Date: May 2006
Location: new york city
Posts: 346
Dennis, is it the geardear or the indie snap mattebox?
__________________
I will be KING!
Jaadgy Akanni is offline   Reply With Quote
Old November 10th, 2006, 03:43 PM   #6
Trustee
 
Join Date: Jun 2006
Location: Burbank
Posts: 1,811
Which matte box and what setup (how many filters?) is it? Undoubtedly someone has specific experience with what you are using and can give precise info on your situation.
Jack Walker is offline   Reply With Quote
Old November 11th, 2006, 10:10 AM   #7
Major Player
 
Join Date: May 2006
Location: Boston, Massachusetts
Posts: 425
It's from www.imagewest.tv. I believe it holds one filter.

When I get a chance I'll see what focal length I'm at to get the edges of the adapter out of the way.

I sent them an email asking for their advice but I haven't had a reply.
Dennis Stevens is offline   Reply With Quote
Old December 29th, 2008, 09:16 AM   #8
Tourist
 
Join Date: Nov 2006
Location: S.Agata Li Battiati, Catania, Italy
Posts: 3
Indie Snap deliver the product?

All of this in terms of quality is very good, but delivered the product? I have bought and paid with paypal a matte box for canon xha1 on 5 June 2008. I have not arrived. I sent numerous e-mail address to request a tracking number, but nothing, no response. Take advantage of this thread for me to respond by the company and understand the why of this incredible behavior. For fear that my mail was spam in the end, I sent this information with an email address, but nothing. So my question is: get the goods?
My mail is info@giovannilombardo.it - I invite you to answer me.

Giovanni.
Giovanni Lombardo is offline   Reply With Quote
Old December 29th, 2008, 09:21 AM   #9
Inner Circle
 
Join Date: Apr 2006
Location: Wales
Posts: 2,130
It's obviously no good if you're getting vignetting. You might be able to get a wide angle adapter ring, or maybe a clamp on ring (so that the adapter is on the outside of the lens barrel rather than screwed into the front), this will solve it for sure, it's just a question of how wide the front of the matte box is and the front of your lens is.
Steve
Steve Phillipps is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > JVC ProHD & MPEG2 Camera Systems > JVC GY-HD Series Camera Systems

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 09:54 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network