Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-05-2009, 12:49 PM   #1
Senior Member




Join Date: Mar 2008
Posts: 285
Strange effect (double lines) with polarizer

Recently I discovered this strange effect when using (various) wide angle lenses with a polarizer.

Has anyone seen this before? Any explanations or solutions?

Thank you!

EXIF:
Camera Model Name: PENTAX K10D
Exposure Time: 1/45
F Number: 8.0
ISO: 100
Focal Length: 20.0 mm
Shake Reduction: On

Attached Images
   
05-05-2009, 01:30 PM   #2
Veteran Member




Join Date: Feb 2008
Location: Toronto
Posts: 3,915
cheap polarizer?
05-05-2009, 01:36 PM   #3
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,314
out of focus and CA?
05-05-2009, 01:44 PM   #4
Veteran Member
ftpaddict's Avatar

Join Date: Jan 2008
Location: Yurp
Photos: Gallery
Posts: 4,669
Cheap polarizer, out of focus and CA?

05-05-2009, 01:45 PM   #5
Senior Member
sharko's Avatar

Join Date: May 2008
Location: City of Angels
Photos: Gallery
Posts: 278
Wind maybe? A polarizer eats light and will slow your shutter speeds down.
05-05-2009, 01:47 PM   #6
Veteran Member
heliphoto's Avatar

Join Date: May 2008
Location: Region 5
Photos: Gallery
Posts: 2,540
windy day and the polarizer is dropping the shutter speed too much?
05-05-2009, 01:50 PM   #7
Veteran Member
ftpaddict's Avatar

Join Date: Jan 2008
Location: Yurp
Photos: Gallery
Posts: 4,669
The background looks blurry as well. Another crop would help.
05-05-2009, 02:05 PM   #8
Veteran Member




Join Date: May 2009
Location: Scotland
Posts: 581
Did you buy a circular or a linear polariser?

Strictly speaking, you should buy a circular as it can screw up the focusing - however I bought a linear polariser and haven't a problem with the AF.

Just thought i'd mention it.

05-05-2009, 02:08 PM   #9
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 26,231
QuoteOriginally posted by heliphoto Quote
windy day and the polarizer is dropping the shutter speed too much?
That is my guess. Perhaps the OP could post a picture of something less limber?

Steve
05-06-2009, 10:01 AM   #10
Senior Member




Join Date: Mar 2008
Posts: 285
Original Poster
QuoteOriginally posted by sharko Quote
Wind maybe? A polarizer eats light and will slow your shutter speeds down.
Hm, shutter speed was 1/45 s and it wasn't even very windy ... don't know
05-06-2009, 10:06 AM   #11
Senior Member




Join Date: Mar 2008
Posts: 285
Original Poster
QuoteOriginally posted by ftpaddict Quote
The background looks blurry as well. Another crop would help.
Here you are. The shot was manually focused, I agree, it's not perfectly sharp.
Attached Images
 
05-06-2009, 10:10 AM   #12
Senior Member




Join Date: Mar 2008
Posts: 285
Original Poster
QuoteOriginally posted by stevebrot Quote
That is my guess. Perhaps the OP could post a picture of something less limber?

Steve
Good idea

I've tried to reproduce the problem before, but the effect didn't show up. It shows only in very few images, always at daylight with polarizer ...
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!
effect, k-mount, pentax lens, polarizer, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
This effect.... timstone Digital Processing, Software, and Printing 6 05-01-2010 03:45 AM
Strange effect juanraortiz Post Your Photos! 7 09-08-2009 10:21 AM
Strange lines in photos? Danitzh Pentax DSLR Discussion 10 08-17-2008 09:36 AM
HELP!! Strange lines and missing data from files K10d Spooked Pentax DSLR Discussion 6 04-27-2008 03:50 PM
Comic effect! Look what I did :) CJCram Digital Processing, Software, and Printing 9 11-06-2007 10:52 AM



All times are GMT -7. The time now is 04:55 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