Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-09-2008, 10:59 AM   #1
New Member




Join Date: Mar 2008
Location: North
Posts: 10
How to use 1000x Neutral Density filter with DSLR

Recently purchased 1000x B+W ND filter. Intention was to use really really long shutter times.

All pictures I get with this are completely black obviously because the K10D calculaets too short shutter time.

One attempt was on a sunny day, manual focus to infinity and with aperture priority (F4.0, ISO400) the K10D calculated 20s shutter time -> still the picture was just black (nearly).

The max. shutter time with K10D is 30s and still this does not seem to suffice?
How bright environment is really needed for this kind of filter? Or for landscapes should the bulb mode be used for something like 120s?

07-09-2008, 11:02 AM   #2
Veteran Member
Gooshin's Avatar

Join Date: Sep 2007
Location: Toronto, the one in Canada.
Posts: 5,611
are you shooting flare guns at point blank range? hahahahaha
07-09-2008, 11:11 AM   #3
Pentaxian
bdery's Avatar

Join Date: Mar 2008
Location: Quebec city, Canada
Photos: Gallery
Posts: 5,657
The easiest way to see what's going on would be to use manual mode and test various exposures until you see something.

What is the Optical Density (OD) value of the filter? 1000x does not tell me much, it's not a way of naming filters that I'm familiar with.

It seems that any filter useful for photography would yield at least some light after 20 seconds at f4, in daylight. Strange.

Try taking a metering reading with and without the filter, to see how the camera evaluates the light.
07-09-2008, 11:19 AM   #4
Senior Member
joefru's Avatar

Join Date: Mar 2008
Location: South Louisiana
Photos: Gallery
Posts: 210
Is it really 1000x? As in a 10-stop ND filter? Wow. Yes, you'll definitely need to go with bulb mode for anything longer than 30 seconds, and definitely don't rely on the camera to aid you. If the filter is indeed 10 stops, meter with it off, then multiply the shutter speed by 1000. So if you're getting a 1/1000 reading with no filter, mount the filter and expose for 1 second and that should be correct. But if you're metering 1/30, then with the filter, you'll need a 30-second exposure.

07-09-2008, 11:33 AM   #5
New Member




Join Date: Mar 2008
Location: North
Posts: 10
Original Poster
full details:

B+W 67 110 ND 3.0 - 10 BL 1000x

uhhh, hopefully not a totall overkill

> So if you're getting a 1/1000 reading with no filter,
> mount the filter and expose for 1 second and that should be correct.
> But if you're metering 1/30, then with the filter, you'll need a 30-second exposure.

The strange thing was that without the filter the camera metered 1/250s exposure time. I used manual mode + attached the filter -> camera calculated 20s ( 1/250 x 1000 ~ about 20s) and still just (nearly) black image.

hmm, have to try again but need to wait for the next sunny day.....
07-09-2008, 11:40 AM   #6
Veteran Member
Gooshin's Avatar

Join Date: Sep 2007
Location: Toronto, the one in Canada.
Posts: 5,611
this is a total shot in the dark (pun intended) but maybe there is a film/protector layer on your filter from manufacture that you have to remove, much like those LCD protectors?
07-09-2008, 11:55 AM   #7
Veteran Member




Join Date: Jun 2007
Location: Owego, NY
Posts: 976
Probably overkill.

Two things:
1) Metering becomes inaccurate at extremely low light levels like that
2) Metering is hopeless unless you put on the viewfinder cover that came with the camera - leakage into the eyepiece will cause severe underexposure in a situation like this.

I believe also in extreme situations like this the sensor can become nonlinear. Not sure.
07-09-2008, 01:11 PM   #8
Veteran Member
Nesster's Avatar

Join Date: Oct 2006
Location: NJ USA
Photos: Gallery
Posts: 13,047
Yep, B&H lists this as a 10 stop reduction.

Entropy's point is a good one - cover the view finder! I shoot with a pinhole and early on I discovered the need for this, not only was the meter getting some but so was the film. Light that is

It should work, I've used 30 second exposure times OK. The write time goes way long though as the noise reduction kicks in.

In sun glass terms this is dark but not THAT dark, can you actually see through it?

07-09-2008, 03:30 PM   #9
Inactive Account




Join Date: Oct 2007
Location: Brisbane, QLD, AUS
Posts: 3,262
Two words: Bulb mode.

Unfortunately, this means you're gonna have to figure out the right exposure yourself.
07-09-2008, 05:56 PM   #10
Veteran Member




Join Date: Apr 2007
Location: Melb. Aust
Posts: 841
and since this is 'digital'... experiment! If 20secs is not enough, double it... if that's not enough, double that, etc, etc until you get something.
07-09-2008, 06:43 PM   #11
Site Supporter
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 14,430
Other than to have moving objects "disappear" from the image, what is the intended result of using this filter? Just to get blur?
07-09-2008, 08:40 PM   #12
Veteran Member
creampuff's Avatar

Join Date: May 2007
Location: Singapore
Photos: Gallery
Posts: 3,955
QuoteOriginally posted by SpecialK Quote
Other than to have moving objects "disappear" from the image, what is the intended result of using this filter? Just to get blur?
A strong ND filter allows objects to disappear but it also has the effect of intensifying colours due to the long exposures. Friends of mine using the ND400 at night typically shoot between 2 to 3 minute exposures.

No offence but I can't help but notice a couple of unqualified comments from those who I guess have never even tried this ND filter. I would suggest they go give it a try firsthand. It will perhaps deepen their understanding of what a strong cut ND filter does.
07-09-2008, 08:54 PM   #13
New Member




Join Date: Mar 2008
Location: North
Posts: 10
Original Poster
QuoteOriginally posted by Nesster Quote
Yep, B&H lists this as a 10 stop reduction.

Entropy's point is a good one - cover the view finder! I shoot with a pinhole and early on I discovered the need for this, not only was the meter getting some but so was the film. Light that is

It should work, I've used 30 second exposure times OK. The write time goes way long though as the noise reduction kicks in.

In sun glass terms this is dark but not THAT dark, can you actually see through it?
this one I did not know, does the view finder really leak so much light in?
And yes I can see through it but barely. But anyway the only problem I seem to have is the correct exposure time. Have to experiment with the bulb mode.
07-09-2008, 10:59 PM   #14
Site Supporter
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 14,430
QuoteOriginally posted by creampuff Quote
A strong ND filter allows objects to disappear but it also has the effect of intensifying colours due to the long exposures. Friends of mine using the ND400 at night typically shoot between 2 to 3 minute exposures.

No offence but I can't help but notice a couple of unqualified comments from those who I guess have never even tried this ND filter. I would suggest they go give it a try firsthand. It will perhaps deepen their understanding of what a strong cut ND filter does.
No offense to you but I simple asked a question. I've never heard of long exposures intensifying colors. Anyone else?

Of course everyone should go out and use this filter just so we can be as smart-ass you.
07-09-2008, 11:22 PM   #15
Senior Member




Join Date: Oct 2007
Location: Tallinn
Posts: 265
I just bought a new tripod, so reading this kind of makes me want to try these long exposures myself
Carless and peopleless photos of streets in midday should be quite interesting.
BTW. what about pictures of the sun ? Solar eclipses etc. This filter should be quite right for that.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, density filter, dslr, filter, k10d, photography, shutter, time
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Neutral Density Filter FAQ Donkeypunch Pentax Camera and Field Accessories 40 03-05-2011 09:23 PM
Neutral density filter desertwalker Troubleshooting and Beginner Help 5 01-04-2010 04:58 PM
Graduated Neutral Density Filter Options sharko Pentax SLR Lens Discussion 5 06-25-2008 02:19 PM
neutral density filter in Photoshop? canadave Photographic Technique 3 05-26-2008 07:27 PM
For Sale - Sold: FS: Neutral Density Filter plus others 52mm Bob Tuttle Sold Items 1 05-23-2007 11:34 AM



All times are GMT -7. The time now is 12:01 PM. | See also: NikonForums.com, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top