Time-lapse Sunrise at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Open DV Discussion
For topics which don't fit into any of the other categories.


Reply
 
Thread Tools Search this Thread
Old June 21st, 2005, 06:20 PM   #1
Major Player
 
Join Date: Aug 2004
Location: Mystic Ct.
Posts: 477
Time-lapse Sunrise

Has anyone shot one of these?
Perhaps I should shot it real time and do the time-lapse in post?

If you have shot one, how did you expose for it?
One set exposure or vary it over the course of the sunrise?

Any help will be appreciated.

Thank you.

Mr. Bill
__________________
Cinematographers Bring Shadow To Light
Bill Hamell is offline   Reply With Quote
Old June 21st, 2005, 08:40 PM   #2
Wrangler
 
Join Date: Dec 2002
Location: Mays Landing, NJ
Posts: 11,543
I have shot quite a number of sunsets. I've always locked the exposure since that seems to give a better effect (it should get darker as the sun sets). I've also added multiple ND filters in addition the the camera's internal. Warning! You could damage your camera: make sure you have adequate filtration not to burn the CCD's. I like using external ND filters. Look through them: if the sun hurts your eyes then it may hurt your camera!

By far the best way to do this is just rolling continuous tape. I was only looking for about 30 to 60 seconds of finished video, so it can easily fit on a tape in real time. If shooting at max telephoto you'll only need maybe 15 minutes of footage. I've shot them in a variety of ways, wide angle lens, wide shots, telephoto shots and also using a 2x teleconverter. Some of these were used as 44' wide projections in one of our operas:

http://tech.operaphilly.com/sets/trovatore/pix/1/08.pdf

Don't use the time lapse feature on your camera, it won't give you smooth motion for a short term event like a sunrise/sunset.
Boyd Ostroff is offline   Reply With Quote
Old June 21st, 2005, 08:59 PM   #3
Wrangler
 
Join Date: May 2003
Location: Houston, TX
Posts: 4,093
Critical Safety Tip

Unless you specifically KNOW that it is solar-safe, DO NOT EVER look through any glass, filter, lens (including direct-view cameras such SLRs), or prism directly at the sun, arc welders, or other similarly very bright objects. It may BLIND you permanently! Depending on the circumstances, it can happen in a split second.

http://sunearth.gsfc.nasa.gov/eclips...lp/safety.html

If you're judging your ND filters and overall exposure by looking at your monitor, there is no problem because you're viewing a CCD image, not the actual source...of course, as Boyd pointed out, direct sun exposure can damage a CCD.

Now, get on out there and record those beautiful sunrises and sunsets...and make sure you'll be able to view them in your home theater later! ;-)
__________________
Pete Bauer
The most beautiful thing we can experience is the mysterious. It is the source of all true art and science. Albert Einstein
Trying to solve a DV mystery? You may find the answer behind the SEARCH function ... or be able to join a discussion already in progress!
Pete Bauer is offline   Reply With Quote
Old June 22nd, 2005, 12:19 AM   #4
Major Player
 
Join Date: Nov 2004
Location: Houston, TX
Posts: 331
Excellent point Pete. Safety should always come first.

So how do we determine whether or not the sun will damage the CCDs?
Is it just a matter of adding enough external ND filters? If so, how many?
Pete Wilie is offline   Reply With Quote
Old June 24th, 2005, 08:43 AM   #5
Major Player
 
Join Date: Aug 2004
Location: Mystic Ct.
Posts: 477
Boyd,

Thank you for your response.

How much external ND do you use?
The reason I ask is I will need to purchase it for the shot.
I have never needed more than the internal ND and the PL filter I currently have.

I will be doing two scenes one will be the time-lapse alone and the second will be the sunrise with Dressage action in silhouette.
On camera 1, I want the complete sunrise and on camera 2, the action shots.
That way I can shoot both scenes that I need on one day.

I had it in my mind to shoot real time glad you confirmed that.

Thank you for the image thatís what I am looking for.

Pete,

Thank you for the concern I have done sun spot still photography before so I know from where you speak.

Thank you both again.

Mr. Bill
__________________
Cinematographers Bring Shadow To Light
Bill Hamell is offline   Reply With Quote
Old June 24th, 2005, 05:48 PM   #6
Wrangler
 
Join Date: Dec 2002
Location: Mays Landing, NJ
Posts: 11,543
I'm never clear on how the different companies rate their ND filters, it isn't consistent. I believe a combined a ND6 and ND2. Basically it was one very dark one, and another medium one :-) I just used what I had handy though, and didn't do anything scientific. I think I also ended up throwing on a polarizer to cut the light down even more.
Boyd Ostroff is offline   Reply With Quote
Old June 24th, 2005, 07:43 PM   #7
Major Player
 
Join Date: Aug 2004
Location: Mystic Ct.
Posts: 477
Boyd,

Thank you again.
Here is a little guide, these are the comparisons I know of.

ND.3 (ND2) (exposure adjustment = 1 stop; )

ND.6 (ND4) (exposure adjustment = 2 stops;)

ND.9 (ND8) (exposure adjustment = 3 stops; )

ND1.8 (exposure adjustment = 6 stops)

ND3.0 (exposure adjustment = 10 stops)

ND4.0 (exposure adjustment = 13 stops)

ND6.0 (exposure adjustment = 20 stops)

Mr. Bill
__________________
Cinematographers Bring Shadow To Light
Bill Hamell is offline   Reply With Quote
Old June 24th, 2005, 11:21 PM   #8
Major Player
 
Join Date: May 2004
Location: Louisville, KY
Posts: 378
Whenever i have done this, i just put the camcorder on full auto with the on board time lapse function. Works smooth enough.
Eric Stemen 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 > The Tools of DV and HD Production > Open DV Discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 11:51 AM.


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