ND filter questions at DVinfo.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 PMW-300, PXW-X200, PXW-X180 (back to EX3 & EX1) recording to SxS flash memory.


Reply
 
Thread Tools Search this Thread
Old February 24th, 2008, 08:45 AM   #1
Major Player
 
Join Date: Nov 2007
Location: Finland
Posts: 317
ND filter questions

Hi,

I am looking for ND filters to put in front of my LEX and canonFD prime lenses. The EX1 states it uses ND filters 1=1/8 and 2=1/64.

1) To get the same amount of light loss am I looking for ND filters marked ND8 and ND64? Or how do the numbers translate?

2) Am I good with some cheaper ND filters from ebay like Hoya or Marumi? I really dont want to spend more than about 100 euros to get 1 or 2 good ND filters for both my 72mm and 52mm thread Canon FD lenses.

Would really appreaciate some advice, thank you!

Sami
Sami Sanpakkila is offline   Reply With Quote
Old February 24th, 2008, 09:25 AM   #2
Major Player
 
Join Date: Nov 2007
Location: Los Angeles, CA
Posts: 498
ND filters are generally designated by their optical density, where

.3 = 1 stop
.6 = 2 stops
.9 = 3 stops,
1.2 = 4 stops

etc. (though there isn't much "etc" after that).

They are usually referred to as N3, N6, N9 etc. as shorthand.

The ND filters on the EX1 are labeled by their light transmission - so 1/8 = 3 stops and 1/64 = 6 stops. (2^3 and 2^6, respectively)

Hence, to get the equivalent of the 1/8 filter you would need to buy an ND .9 and to get the equivalent of the 1/64 filter you would need an ND 1.8.
Eric Pascarelli is offline   Reply With Quote
Old February 24th, 2008, 09:52 AM   #3
Major Player
 
Join Date: Nov 2007
Location: Finland
Posts: 317
Thanks Eric,

Most places Im looking at the ND filters they are named ND4, ND8 or NDx8 NDx64. Maybe thats more common for the screw on filters? All the 4x4 filters I see are named just the way you said.

Do you think if I would get an ND64 with a thread size of 58mm I could use them on my 52mm lenses with a step up adapter. The distance from the lens shouldnt make a difference? Those mattebox filter holders place them away from the lens as well right?

Sami
Sami Sanpakkila is offline   Reply With Quote
Old February 24th, 2008, 11:06 AM   #4
Major Player
 
Join Date: Nov 2007
Location: Los Angeles, CA
Posts: 498
No - distance shouldn't matter except that the farther they are away, the more likely that dust etc. on the filter will be in focus and visible in your shot.

Matte boxes certainly hold the filters a bit farther away than screw ons.

Why wouldn't you just use the internal filters on the EX1?
Eric Pascarelli is offline   Reply With Quote
Old February 24th, 2008, 11:15 AM   #5
Trustee
 
Join Date: Oct 2005
Location: Gilbert, AZ
Posts: 1,896
Quite often I'm striving for those tighter DOF shots. Granted it's a bit easier than 1/3" cams for a given stop, but having a matte box with extra filters will allow you to stay close to f1.9 under bright outdoor light.

I was shooting with ND2 yesterday and needed more ND to get closer to f1.9. I believe I was at f5.6 and cluld not open anymore without over exposing my shot. I thought about going to the shutter, but I'd rather not.

I'm looking to buy a reasonable matte box with rails and hardware.
Steven Thomas is offline   Reply With Quote
Old February 24th, 2008, 01:57 PM   #6
Major Player
 
Join Date: Sep 2007
Location: Palm Desert, California
Posts: 311
To really open up in bright light I find I need BOTH the internal ND filters and the matte box. A good quality but cheap filter is the Format or CA does a generic version which is what I have. While ordering you might want to get some graduated ones as well
Michael H. Stevens is offline   Reply With Quote
Old February 24th, 2008, 02:02 PM   #7
Major Player
 
Join Date: Nov 2007
Location: Finland
Posts: 317
Quote:
Originally Posted by Eric Pascarelli View Post

Why wouldn't you just use the internal filters on the EX1?
I need to cut down the light before it hits the adapters ground glass or grain will show up in the footage. If too much light gets there using the cameras aperture or ND filters wont help.

Thanks for all your advice!

Sami
Sami Sanpakkila is offline   Reply With Quote
Old February 24th, 2008, 02:45 PM   #8
Major Player
 
Join Date: Sep 2007
Location: Palm Desert, California
Posts: 311
Quote:
Originally Posted by Sami Sanpakkila View Post
I need to cut down the light before it hits the adapters ground glass or grain will show up in the footage. If too much light gets there using the cameras aperture or ND filters wont help.

Thanks for all your advice!

Sami
In that case a matte box that swings away or screw on filters. There will be a slection of very cheap used filters for CLA going up on www.lenses35.com by mid week.
Michael H. Stevens is offline   Reply With Quote
Old February 24th, 2008, 03:04 PM   #9
Major Player
 
Join Date: Nov 2007
Location: Finland
Posts: 317
Sounds very interesting! What is CLA?


Sami
Sami Sanpakkila is offline   Reply With Quote
Old February 25th, 2008, 10:37 AM   #10
Major Player
 
Join Date: Sep 2007
Location: Palm Desert, California
Posts: 311
Quote:
Originally Posted by Sami Sanpakkila View Post
Sounds very interesting! What is CLA?


Sami
Cinema Lens Adapter, same as DOF adapter. Sorry for using non-standard abbreviations.
Michael H. Stevens 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 > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony XDCAM EX Pro Handhelds

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 01:06 AM.


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