Our 1/8 and 1/64 in 4x4 filter lingo? at DVinfo.net

Go Back   DV Info Net > Panasonic P2HD / AVCCAM / AVCHD / DV Camera Systems > Panasonic DVX / DVC Assistant

Panasonic DVX / DVC Assistant
The 4K DVX200 plus previous Panasonic Pro Line cams: DVX100A, DVC60, DVC30.


Reply
 
Thread Tools Search this Thread
Old August 19th, 2003, 02:52 PM   #1
Major Player
 
Join Date: May 2003
Location: Camarillo, CA
Posts: 340
Our 1/8 and 1/64 in 4x4 filter lingo?

Please excuse my ignorance about this stuff, but in looking over Tiffen's site regarding ND filters (their PDF isn't loading properly) I found myself confused insofar as what our 1/8 and 1/64 translates to in 4x4 filter lingo. Anybody know? Am wondering if, in full mountain sun, I should have a stronger ND along with me, stronger than what is native on our camera, that is. But I'm not sure what I've got already, when looking at how they rank them.

Just curious.
Thanks yet again,
Marcia

P.S. The tech guy at Panasonic that I'd called for another reason had no idea.
Marcia Janine Galles is offline   Reply With Quote
Old August 19th, 2003, 06:25 PM   #2
Space Hipster
 
Join Date: Oct 2001
Location: Greensboro, NC
Posts: 1,508
Fractions with ND refer to usually how much lighted is block. 1/8 = 7/8th is blocked, 1/8th comes through etc.

Each f-stop move either doubles or halves amount of light, so 1/8th gives you two stops of ND and 1/64th gives you 4 stops, more or less (unless my math skills from 5th grade have deserted me :)
__________________
stephen v2
www.insaturnsrings.com
Stephen van Vuuren is offline   Reply With Quote
Old August 19th, 2003, 07:04 PM   #3
Major Player
 
Join Date: May 2003
Location: Camarillo, CA
Posts: 340
Thanks much. Makes sense when you put it that way, even though I think I've more than likely forgotten my 5th grade math and then some. ;-)

One last thought, are there any issues with ND filters that I should know about? I'd never use gain even if it was available in 24p as I hate how it looks, but as opposed to boosting, since ND only restricts the amount of light, however strong a filter I use, it won't effect picture quality in some unforseen way, will it? (Can't think of how it could...)
Marcia Janine Galles is offline   Reply With Quote
Old August 19th, 2003, 09:35 PM   #4
Barry Wan Kenobi
 
Join Date: Jul 2003
Location: North Carolina
Posts: 3,863
Sorry Stephen, we gotta send you back to 5th grade math... :)

1/8 = 3 f-stops (1=1/2 the light, 2=1/4, 3=1/8) and 1/64 = 6 f-stops.

1/8 = ND.9

The 1/64 is the same as using two ND .9's.

I don't think you'll need a stronger ND, the existing 1/64th will turn an f/16 scene into f/2. If you do decide to get an external ND, I'd recommend a .6, not a .9, because you've already got two .9's built into the camera.
Barry Green is offline   Reply With Quote
Old August 19th, 2003, 10:19 PM   #5
Space Hipster
 
Join Date: Oct 2001
Location: Greensboro, NC
Posts: 1,508
Barry:

Thanks teach :)

I knew I was screwing something up. And to believe I once took calculus and trig though I could not tell you want those actually are...

stupid is as stupid does...
__________________
stephen v2
www.insaturnsrings.com
Stephen van Vuuren 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 > Panasonic P2HD / AVCCAM / AVCHD / DV Camera Systems > Panasonic DVX / DVC Assistant

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 12:48 PM.


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