Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-02-2012, 04:44 PM   #1
Veteran Member
kaiserz's Avatar

Join Date: Nov 2011
Location: NoVa The "burg"
Photos: Gallery
Posts: 899
Major vignetting with 10 - 20 sigma + B+W ND 110 (10 stops)

I just got my B+W ND110(10 stops) and I've been testing it out with my 10 - 20 sigma and have been experiencing major vignetting, is this normal?

ISO 100 10mm 30secs f18


ISO 100 10mm 6secs f5.6


ISO 100 10mm 8secs f5.6

ISO 100 10mm 15secs f5.6


06-02-2012, 04:58 PM   #2
Loyal Site Supporter




Join Date: Jun 2009
Location: Tumbleweed, Arizona
Photos: Gallery | Albums
Posts: 5,107
I have not looked to see how large the front element of the lens is, however the thickness of the filter may be the major contributing factor here. You might want to see if it comes in a thin or slim style. I picked up a filter for my 12-24 and did get a thin mount a number of years ago, just so that I would not have this problem (and did not encounter this).

The wider angle lenses - especially the wider the more prevalent the problem, although you would not expect this with the size of the hood that comes with these lenses.

Looking more at your images, I am wondering why there is heavier vignetting on the left side, with somewhat minor vignetting on the right. I would expect that the vignetting should be somewhat more uniform and evenly distributed. That may be an insight into why.

just an idea....
06-03-2012, 12:25 PM   #3
Veteran Member
kaiserz's Avatar

Join Date: Nov 2011
Location: NoVa The "burg"
Photos: Gallery
Posts: 899
Original Poster
Sam here, I don't know why the left side has more pronounced vignetting than the right, I did try removing the Hood, and also twisted the filter but to no avail, should I just return this filter back? is there no other way to get a 10 - 20 sigma a 10 stop ND filter?
06-10-2012, 09:28 AM   #4
Veteran Member
PPPPPP42's Avatar

Join Date: Jan 2012
Location: Wisconsin
Photos: Albums
Posts: 847
Whats it look like at 20mm? The lopsidedness of it is a tad odd.
Some of these APSC inspired ultra wide lenses are a bit cracked in terms of what is still allowable on the end of them, though with the huge step they added to it to allow a much wider filter diameter it shouldn't be having problems. This particular lens is known for a bit of corner shading which any filter would make worse at the widest angle but not to that extent, especially the upper left side, makes me wonder if something in the lens or camera is out of alignment and the center of the image is actually farther lower right. Be nice to see if the normal slight corner shading would be lopsided too.

It would be great if you have a different lens where you can stack a ton of filters until the corners are shaded and see how even it is, then you would know if its a camera sensor or lens misalignment. It would be odd for it to still be clear if it was the lens.

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!
10mm, camera, f5.6, iso, pentax help, photography, sigma
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Major cleaning (cheap lenses -50mm 1.7, super takumar, sigma etc etc- and film stillnk Sold Items 10 04-11-2011 05:20 PM
Sigma 17-70 f2.8-4.5 (FL and f-stops) fLyIr Pentax SLR Lens Discussion 6 03-09-2011 09:42 AM
Something nice for our Pentax Auto 110 users: Auto 110 lens database Adam Pentax Film SLR Discussion 3 09-24-2010 06:42 AM
Any idea why Tamron 28-75mm f/2.8 is about $110 higher then Sigma 28-70mm f/2.8? Reportage Pentax SLR Lens Discussion 8 07-19-2010 03:26 PM
Major Gaffe with new to me Sigma 28 f1.8 kev.pride Post Your Photos! 2 05-09-2008 03:15 AM



All times are GMT -7. The time now is 11:35 PM. | See also: NikonForums.com, CanonForums.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