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-   -   Filming Lightning (https://www.dvinfo.net/forum/canon-xl1s-xl1-watchdog/2947-filming-lightning.html)

Dylan Couper August 6th, 2002 11:18 PM

Re: Filming Lightning
 
<<<-- Originally posted by Robert J. Wolff : Shock cords are and elastic, flexing cord. used as a tie down. You have probably seen them on motor bikes, etc. Usually, holding a sleeping bag, among other items, to the back of the bike.

-->>>

Also known as a bungee cord?

John Locke August 6th, 2002 11:29 PM

Riley,

I have the KATA rc-11 and have used it in very light rain conditions...and it does fine. Just haven't worked up the courage yet to try it in a steadier, heavier rain.

Only one problem I've found. The heavy nylon is stiff and makes noise with every little move. You'll have to keep it more steady than usual to keep from getting the sound in your footage.

Nick Glenister August 7th, 2002 05:43 AM

Re: Re: Filming Lightning
 
<<<-- Originally posted by Robert J. Wolff : Shock cords are and elastic, flexing cord. used as a tie down. You have probably seen them on motor bikes, etc. Usually, holding a sleeping bag, among other items, to the back of the bike.-->>>

<<<-- Originally posted by Dylan Couper : Also known as a bungee cord? -->>>

Ahhhh a bungee cord, it all makes sense now =o) cheers Dylan. I kinda got the gyst of what you were talking about Robert, thanks.

Trying not to sound thick (but resigned to the inevitable), where do i get an Interferometer from and how much do they cost?

Nick

Nick Glenister August 19th, 2002 02:19 AM

I shot some more footage of another recent storm and as soon as i get my new hard drive i'll edit and post some .avi files to my website.

I'll post the link to my webpage here in the next few days

regards

Nick

Robert J. Wolff August 19th, 2002 02:14 PM

Filming Lightning
 
Nick,

My appology for not responding sooner. I travel a lot, and, therefor, am not at my toy message machine every day. You have these days, a built in interferometer: In the Xl-1s, you call it time lapse. Ignore me. I started in film; and, was fortunate to spend almost 40 years in the networks, in video.
As such, I fall into the habit of using obsolete verbiage.

Nick. The only ignorant one in this group, refuses to ask a question. They have all of the answers. Just ask them.

Nick Glenister August 20th, 2002 10:02 AM

Re: Filming Lightning
 
<<<-- Originally posted by Robert J. Wolff : Nick,
You have these days, a built in interferometer: In the Xl-1s, you call it time lapse -->>>


Cool... does the XL1 have time lapse too? i'd look in the manual only i'm in the middle of decorating and i can't find it =o(


Nick

Ken Tanaka August 20th, 2002 10:10 AM

Hi Nick,

No, unfortunately, time-lapse (or "interval") recording was a feature Canon first introduced to their video cams with the XL1s. The feature is also now available on the new GL-2.

Nick Glenister August 20th, 2002 10:22 AM

Damn!!!


Oh well thanks for the info


Nick

Nick Glenister August 25th, 2002 05:47 AM

Ok guys as promised i've posted some of the pictures and (hopefully once i get my ftp to work properly) some video clips of the the thunderstorm i filmed a week or so ago.

Let me know what you think. I'll be posting some more as time goes by.

Regards

Nick


http://www.nglenister.fsnet.co.uk

Rob Lohman August 26th, 2002 12:50 PM

Looks nice! A tad too light perhaps... but very nice. Didn't had
that good lightning myself to shoot... bummer, oh well. Better
next time.

Nick Glenister August 26th, 2002 12:55 PM

Thanks for the comments.

I was shooting on automatic i think (can't be sure) but i did turn the gain down half way through filming. When i deinterlaced the image that also brightened it up considerably.


Nick

Ken Tanaka August 26th, 2002 01:28 PM

That bolt didn't really hit that house, did it? If not it's sure a good illusion.

Nick Glenister August 27th, 2002 01:26 AM

=o) no it didn't hit the house. It was at least a mile away. The illusion was probably a result of the deinterlacing (you can do even or odd lines, i chose even because doing odd almost removed the lighting completely). The result of that is the computer guesses what should be there making the lightning both brighter than it really was and making it look like it hit the house. Makes the picture look good though

It wasn't raining where i was standing (in the back garden) and the sound of thunder was a good few seconds after the lightning. It started to rain about five minutes afterwards so i went inside and tried to take some pictures wth the camera. By the time i'd set it up on the tripod and open the front door the storm was right over head. about two seconds later i saw a huge flash right overhead and the immediate crash of thunder and thought "blow this", shut the door and ran inside =o/

After that i started filming again through the back window and got a few more clips which i'll get round to posting one day


Nick

Ross Milligan August 27th, 2002 02:49 AM

Just wondering, when scrolling along the clip I noticed that
after the second bolt there are two artifacts that appear just above the roof going horizontaly. Is this lightning as well?

Ross

Jeff Donald August 27th, 2002 05:19 AM

Very nice shots Nick. I'll post this in the interest of safety. From the time you see the flash until you hear the thunder is 5 seconds per mile. It works out to be about 3 seconds per kilometer. I was watching a show on the Discovery Channel about a month ago and they got the time wrong.

Jeff


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