by Ralph E. Powers » Jan 4, 2007 3:22 pm
On the video trips that I've been on (in Utah) we used anything from bright (focused) halogen bulbs mounted on top of the camera that had it's own battery pack to using those 1-3 million candle power spots one can find at sporting goods stores or camping supplies at Walmart.
For a cave like Camp's Gulf then I would definitely recommend two or three cavers armed with a powerful spot light to help illuminate the huge rooms. For something like Byers maybe only one and a camera mounted light.
You want inexpensive then the hand-held rechargable lights are probably going to be the cheapest you can get for the amount of light they produce. Sadly they can't go hours upon hours but you should be able to get at least a half hour's worth of decent footage each time.
Thing is you can't be too stingy with the light if you want a good quality video. I've seen the video-cavers spotlight two or three seconds on something before shutting off the lamp just so they can conserve battery power. This makes for a brief video presentation. Well, this is why you bring two or three of them fully charged and two or three other cavers who'd be willing to tote one in their packs, until needed.
Also your own sense of cinematography is very important to a successful/popular (caving) video. Being willing to go into a crawl way and turn around and crawl half way back out then crawl back out the way you came BACKWARDS to get someone in the crawl working their way through... That takes practice... and patience.
Likewise on rope, we've talked about this enroute to CG; being ambidextrious with your rappelling device helps to be able to get footage of someone going down. Having two ropes so you can rap down part way and lock off then capture someone as they come down (or up) is another good (SAFE) technique. Having a wrist lanyard while holding a camera during rappel will at least allow you to suddenly "drop" the device in case you need to use both hands all of the sudden. Your life is a hellva lot more valuable than a digital camera.
I plan on buying another million-plus candlepower spot-light myself and honestly I don't mind the extra weight. Heck, I'm finding out around here the hikes aren't that bad (compared to alpine hiking/caving) and so I'm having to carry less.