Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
12-20-2013, 05:50 AM   #1
Senior Member

Join Date: Sep 2010
Photos: Gallery
Posts: 232
Weird banding issue using ND filter?


Anyone know what may be causing this weird banding issue when using a B+W 10 stop ND filter? It happens randomly but once it does, it seems to occur every shot even though I ensure the lens and filter is clean. I'm using a Pentax 15mm. Sometimes it's subtle but sometimes it's so horrible that it destroys the image...

Attached Images
View Picture EXIF
PENTAX K-5  Photo 
View Picture EXIF
PENTAX K-5  Photo 
View Picture EXIF
PENTAX K-5  Photo 
12-20-2013, 05:54 AM   #2
Site Supporter
Site Supporter
crewl1's Avatar

Join Date: Jul 2010
Location: Los Angeles, CA
Photos: Gallery | Albums
Posts: 9,805
All these shots are pointed at the sun so perhaps it is weird flare behavior.
Do you get the banding when the sun is behind?
Try another filter. I have not used a B&W filter but based on how much they cost I would think this should not occur.
Are there counterfeit B&W filters?
12-20-2013, 06:03 AM   #3
Franc's Avatar

Join Date: Jan 2010
Location: Hoevelaken
Photos: Gallery
Posts: 1,163
did you cover the eye piece? It leaks light taking long exposure shots that causing banding.
12-20-2013, 06:35 AM   #4
New Member

Join Date: Mar 2013
Location: Erlangen/Bavaria
Photos: Gallery
Posts: 21
Eye piece cover was my first thought too.
I dont think that the filter is a variable one, i got those issues with a cheap variable ND filter.


12-20-2013, 06:39 AM   #5
Veteran Member

Join Date: Sep 2013
Posts: 306
Yes looks like light is leaking from someplace.

+1 viewfinder is not covered and light leak from there
12-20-2013, 08:19 AM   #6
Veteran Member
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 11,183
I thought of the ND filter first. Cheap ND filters or knockoffs can cause all sorts of odd behaviours, especially with such wide angle lenses and in bright light
But the light leak idea is good, too. Next time you notice this, try covering the viewfinder. If that doesnt help, return the ND filter and get a different brand.
With filters you should be careful, because if you buy online there is a chance you are getting a fake. You should only buy filters from brick and mortar stores, or very reputable online stores (ones that a lot of people use, that you can call up, who have an office you can visit..)
12-20-2013, 09:26 AM   #7
Loyal Site Supporter
Loyal Site Supporter

Join Date: Jun 2009
Location: Tumbleweed, Arizona
Photos: Gallery | Albums
Posts: 5,603
I had experienced some light leakage, somewhat similar from memory. The images are on my PC with all the storage.

This thread supports the light entry via the viewfinder - leaking around the mirror being up and down to the sensor. This does make sense in terms that the light is always banding across the long side of the frame, and it does take on the appearance of the edge of the mirror.There were a couple more posts across the web on this. But, I did come across a couple of other interesting items.
  • The Lee variable ND (since it is made out of two polarizers) that when turned determine the amount of light - at times produces an "X" pattern (based on the relative positions of each of the polarizers relative to the sun in the frame.
  • The other item that I found very interesting is that with a couple of types of ND filters - Black Glass (of which the 10-stop B+W is this type) acts on waterfalls a bit differently that other types of filters. Color casting across the different makes of ND filters, along with the supporting the viewfinder light leaking issue.

12-22-2013, 06:25 PM   #8
Senior Member

Join Date: Sep 2010
Photos: Gallery
Posts: 232
Original Poster
Thanks guys for the help. It's a multi-coated BW filter so it's really likely it's caused by light leakage from the viewfinder instead of a low quality filter. Will try long exposures again with the eye piece and hopefully there's no problem....
12-23-2013, 08:58 AM   #9
Veteran Member
MadMathMind's Avatar

Join Date: Dec 2013
Location: Houston, TX
Photos: Gallery
Posts: 1,717
Your top image is without the filter, right? The same banding issue is in both your beach photos, so it's definitely not the filter.
12-23-2013, 04:07 PM   #10
Senior Member

Join Date: Sep 2010
Photos: Gallery
Posts: 232
Original Poster
They are all with filters, with exposures of longer than 10 secs.
12-23-2013, 04:20 PM   #11
TaoMaas's Avatar

Join Date: May 2007
Location: Oklahoma City
Photos: Gallery | Albums
Posts: 3,461
I think it's light-leak from the viewfinder. Post your results when you test it. Folks are curious. Thanks!
12-23-2013, 04:49 PM   #12
Site Supporter
Site Supporter
mikeSF's Avatar

Join Date: Jan 2009
Location: East Bay Area, CA
Photos: Gallery
Posts: 6,397
not to pile on, but those look just like viewfinder leaks to me. I cant say how many of those covers i have lost, but the number equals how many ive purchased, lol.
12-25-2013, 02:15 AM   #13
Veteran Member
littledrawe's Avatar

Join Date: Jan 2010
Location: Red Rock
Photos: Gallery | Albums
Posts: 2,514
QuoteOriginally posted by mikeSF Quote
cant say how many of those covers i have lost, but the number equals how many ive purchased,
Sounds like something Confucious would say...
07-04-2014, 03:41 PM   #14
Site Supporter
Site Supporter
Spodeworld's Avatar

Join Date: Aug 2011
Location: New Joisey
Photos: Gallery | Albums
Posts: 1,368
I wish I saw this before I left for vacation in Hawaii. We're finishing up now and I noticed terrible sky banding on long exposures of waterfalls using an nd filter. Too late for this trip unfortunately. I doubt I will forget to cover the viewfinder again.
07-04-2014, 08:09 PM   #15

Join Date: Apr 2007
Location: Oklahoma USA
Posts: 2,048
It's irritating that Pentax cameras don't feature the built-in finder blinds that even mid-level 35mm cameras from the 1970s offered. Having some little plastic accessory that you have to fit over the viewfinder is no substitute for a simple lever you flip open and closed.

  • 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!
filter, issue, tripod
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Built-in AA filter like ND filter??? mythguy9 Pentax DSLR Discussion 17 08-30-2013 04:31 AM
Hello - Pentax K-5 Banding issue Binet Welcomes and Introductions 5 08-13-2013 03:11 PM
Strange ND Filter Issue Sol Invictus Troubleshooting and Beginner Help 27 05-08-2012 06:43 PM
Variable ND Filter - Fader ND mark II yusuf Pentax SLR Lens Discussion 2 11-16-2010 11:39 AM
Using Polarizer as an ND Filter? jaieger Pentax Camera and Field Accessories 10 08-22-2010 08:04 AM

All times are GMT -7. The time now is 11:45 PM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]