Shooting Arc Welding at DVinfo.net
DV Info Net

Go Back   DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony XDCAM EX Pro Handhelds

Sony XDCAM EX Pro Handhelds
Sony PXW-Z280, Z190, X180 etc. (going back to EX3 & EX1) recording to SxS flash memory.

Reply
 
Thread Tools Search this Thread
Old August 16th, 2011, 04:31 PM   #1
Regular Crew
 
Join Date: Mar 2008
Location: Indian Rocks Beach, FL
Posts: 165
Shooting Arc Welding

Hello:
I have a video shoot next week at a welding shop in Ohio. The company does unique style of welding as we are going to put a piece together to demonstrate their capabilities. Has anyone shot video of welding? Is there a chance of blowing out the sensor on the EX-1 or the Canon EOS 7D? What precautions would you suggest?
Thanks,
Phil
Phil Hanna is offline   Reply With Quote
Old August 16th, 2011, 04:47 PM   #2
Inner Circle
 
Join Date: Feb 2006
Location: Belfast, UK
Posts: 6,143
Re: Shooting Arc Welding

I've shot welding on a number of occasions and never had any problems with the camera. However, I'd avoid looking at the welding arc itself directly with my eyes.
Brian Drysdale is offline   Reply With Quote
Old August 16th, 2011, 09:08 PM   #3
Major Player
 
Join Date: May 2002
Location: West Central Florida
Posts: 762
Re: Shooting Arc Welding

Same here. I shot some heliarc(?) welders at work once and my EX1 had no problems.
Dave Morrison is offline   Reply With Quote
Old August 17th, 2011, 08:10 AM   #4
Major Player
 
Join Date: Jul 2005
Posts: 580
Re: Shooting Arc Welding

And be prepared for some pretty extreme lighting contrasts, of course. I've had a lot of fun over the years adding high shutter speeds to the welding shoot to maximize the sparking and flaring.
Bill Ward is offline   Reply With Quote
Old August 17th, 2011, 08:55 AM   #5
Major Player
 
Join Date: Dec 2005
Posts: 895
Re: Shooting Arc Welding

Would one of those auto-darkening helmets work as a viewing portal for the camera?
Jim Michael is offline   Reply With Quote
Old August 17th, 2011, 08:59 AM   #6
Major Player
 
Join Date: Jul 2009
Location: Hampshire, UK
Posts: 693
Re: Shooting Arc Welding

Quote:
Originally Posted by Bill Ward View Post
And be prepared for some pretty extreme lighting contrasts, of course. I've had a lot of fun over the years adding high shutter speeds to the welding shoot to maximize the sparking and flaring.
Oh yes. I'd forgotten about this. Got some awesome footage on my Z1 in a welding factory. All the smoke really added to the atmosphere as well. Took lots of footage at different shutter speeds.

But as you say be warned about the brightness. You are going to have to compromise somewhere due to the extremes of light. You pretty much can't avoid overexposing the brightest parts of the arc.

And for god sakes watch your eyes. The camera is replaceable, your eyes are not! Keep well back and only view it through the camera.

I always shoot with a UV filter anyway but someone may be able to advise if there is any benefit in this for welding specifically.
__________________
Marcus Durham
Media2u, Corporate Video Production For Your Business - http://www.media2u.co.uk
Marcus Durham is offline   Reply With Quote
Old August 17th, 2011, 02:29 PM   #7
Major Player
 
Join Date: Jul 2003
Location: Leeds, UK
Posts: 660
Images: 10
Re: Shooting Arc Welding

Firstly you should fit a clear filter on the camera lens something like a thin skylight. The Schneider UV 77mm slim fits under an EX1 lens hood. Metalwork and welding can and will send out shrapnel in every direction and depending on the type of welding it can still be very hot over quite long distances.

https://www.schneideroptics.com/ecom...D=992&IID=3918

A chap I know had a particle burnt into the front of his naked front element on a Digibeta camera, not a happy bunny.

It's very easy to forget that the front lens element is quite a bit closer to the action than you, so better safe than sorry.

But also wear safety glasses yourself, even if you already wear glasses, put clear protection glasses on top.
The client are bound to have spare pairs for you.

Duncan.
__________________
FCPX/LS300/EX1/FS100/GoPro/Vinten/HotHead/Jib/Track/Dedos/Lightstorm/Coollights
Duncan Craig is offline   Reply With Quote
Old August 18th, 2011, 04:13 PM   #8
Major Player
 
Join Date: Mar 2010
Location: Raleigh, NC, USA
Posts: 710
Re: Shooting Arc Welding

First off, arc welding generates vast quantities of heat, light, and UV. Also fairly toxic smoke, and depending on what's being welded and how, sometimes a fair amount of shrapnel -- extremely hot and moving pretty fast.

I'm just sayin' that it's not a safe environment. You should protect yourself (heavy work clothes, no synthetic fabrics (plastics [nylon, polyesters, etc.] melt and make a small burn into a larger burn), long sleeves, long cuff leather gloves, safety glasses, safety helmet, etc.

DO NOT wear contact lenses near an arc welder. If you make a mistake and expose your eyes to the arc, you can flash the moisture between lens and eye, making surgical removal of the lens a necessity. Don't chance it.

The brightness of the arc is completely unnatural and can do a lot of bad things to your eyes. This is why so many welders retire at 40 and spend the rest of the lives in various stages of blindness. So DO NOT look at the arc, and do not expose your eyes to the arc even if you aren't looking directly at it. It's not worth the risk. If conditions permit, bring in a light stand and put a flag between your face and the arc so that you can only see the arc through the camera -- so there's no possibility you can make a mistake and look at the arc. That might be the smart play.

Same problem for the camera -- the camera isn't designed to handle a light source as bright as an arc, or with as much UV. I'd want to put an ND filter on the camera about at the same level as the glass in a welding helmet. I don't remember how many stops that is -- something like 14-18 stops? And a UV filter. Manually stop all the way down and open back up as required -- do it manually because the camera automation isn't even close to fast enough. And remember the inverse square law -- keep your distance and use the longer part of your focal length range.

Finally, cover all exposed skin with a physical blocker sunscreen (active ingredient of zine oxide or titanium oxide). A few minutes in the UV of an arc will give you a hell of a sunburn. And sunburned fingers are no fun at all.

Protect yourself, protect the camera, use some common sense, and you should do OK.
Bruce Watson is offline   Reply With Quote
Old August 18th, 2011, 05:12 PM   #9
Inner Circle
 
Join Date: Feb 2006
Location: Belfast, UK
Posts: 6,143
Re: Shooting Arc Welding

The ND that the welder uses allows them to look at the puddle of molten metal in the weld. This is of no use if you wish to film a scene involving welding because all you'd see would be the arc and nothing else. However, you can avoid directly filming the arc itself, by hiding it behind a bit of metal that's being fabricated, the welder's hand or the welding tool. You tend to get a lens flare if you film the arc.

Do wear appropriate clothing for the environment that you're working in, the company involved may have safety regulations regarding dress. Although, I'd differentiate between the gear that you'd wear if you were actaully doing the welding and filming welding at a safe distance. Do protect the front element with a filter if you're going to be within spatter distance and don't directly look at the arc itself.
Brian Drysdale is offline   Reply With Quote
Old August 23rd, 2011, 07:20 AM   #10
Inner Circle
 
Join Date: Dec 2005
Location: Bracknell, Berkshire, UK
Posts: 4,957
Re: Shooting Arc Welding

Quote:
Originally Posted by Bruce Watson View Post
DO NOT wear contact lenses near an arc welder. If you make a mistake and expose your eyes to the arc, you can flash the moisture between lens and eye, making surgical removal of the lens a necessity. Don't chance it.
This is one of those urban myths that is complete nonsense that has been medically disproved many, many times. It has been shown that contact lenses can in some cases be beneficial as they prevent airborne dust and irritants from contacting the cornea. The reported cases of contact lenses "welded" to cornea's were shown to be people that were arc welding without a proper welders mask and the UV light from the welding caused the cornea to break down, as would have happened to anyone's cornea without a suitable mask.

Normal sunscreen is of limited benefit as it rarely offers full UV-A protection and almost never any UV-C protection. UV-A and UV-C can cause skin cancer but neither cause sunburn or pain, that's UV-B. Sunscreen might stop you getting a tan but won't stop your skin from getting damaged. Proper protective clothing is the answer if you are close to the welding. Titanium Oxide is also a nasty carcinogen, Zinc Oxides does not provide any UV-C protection and only partial UV-A.
__________________
Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com
Alister Chapman is offline   Reply With Quote
Old August 27th, 2011, 05:42 AM   #11
Regular Crew
 
Join Date: Mar 2008
Location: Indian Rocks Beach, FL
Posts: 165
Re: Shooting Arc Welding

Thanks to all who responded. The three-day shoot went beautifully. We got all types of welding, Mig, Tig, Laser and other milling shots around three plants. I used the EX-1 ND filters and the shots came out perfectly. What was neat was seeing the welder light up from total darkness since the ND filters were maxed on some shots.

Phil
Phil Hanna 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...

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

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK


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 > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony XDCAM EX Pro Handhelds

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



All times are GMT -6. The time now is 02:09 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network