Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-25-2014, 01:50 PM   #1
New Member




Join Date: Jul 2013
Photos: Gallery | Albums
Posts: 20
*ist DL - Polarizer Filter - Linear or Circular

I've been trying to figure out if my Pentax *ist DL need a Linear or Circular Polarizer?
From what I've read, if the metering is split beam, I need Circular, older, Linear.

I've checked the manual / online and uses a (3 point) SAFOX VIII AF system but not sure if that's split beam.

With manual focusing, I assume it doesn't matter which type it would be.
(ex m42 ring adapter to PK)

06-25-2014, 01:59 PM   #2
Veteran Member
Imageman's Avatar

Join Date: Dec 2013
Photos: Albums
Posts: 461
Circular
06-25-2014, 05:24 PM   #3
Site Supporter
patrick9's Avatar

Join Date: Feb 2011
Location: Murfreesboro Tennessee
Photos: Gallery | Albums
Posts: 3,279
I use a circular on mine.
06-25-2014, 07:42 PM   #4
Veteran Member




Join Date: Jun 2014
Posts: 320
It is recommended that you use a circular polarizer on all autofocus cameras, Regardless of whether you're using a manual focus lens are not. The reason is that part of the focusing system is being used regardless of the lens type you're using, that little light that comes on in your viewfinder proves it. However there are some Pentax cameras that do not seem to be affected by the type of Polarizer that you use.

A good way of checking to see if you have a good circular polarizer, Is to hold it in front of your monitor, object side toward the monitor and turn 90 back and forth. It should go almost completely black To transparent. If you flip it around so that the object side is pointing toward you, There should be no affect when turning 90. This only works with LCD monitors. Tube type monitors will not have any affect on the view through the polarizer.

A standard polarizer will have the same effect regardless of which side you look through.

A bad circular polarizer will also have a similar affect regardless of which side you look through, it also may have a slight color change while you rotate it.

Stay safe and have fun.

Joe.

07-01-2014, 09:29 AM   #5
New Member




Join Date: Jul 2013
Photos: Gallery | Albums
Posts: 20
Original Poster
QuoteOriginally posted by promacjoe Quote
It is recommended that you use a circular polarizer on all autofocus cameras, Regardless of whether you're using a manual focus lens are not. The reason is that part of the focusing system is being used regardless of the lens type you're using, that little light that comes on in your viewfinder proves it. However there are some Pentax cameras that do not seem to be affected by the type of Polarizer that you use.

A good way of checking to see if you have a good circular polarizer, Is to hold it in front of your monitor, object side toward the monitor and turn 90 back and forth. It should go almost completely black To transparent. If you flip it around so that the object side is pointing toward you, There should be no affect when turning 90. This only works with LCD monitors. Tube type monitors will not have any affect on the view through the polarizer.

A standard polarizer will have the same effect regardless of which side you look through.

A bad circular polarizer will also have a similar affect regardless of which side you look through, it also may have a slight color change while you rotate it.

Stay safe and have fun.

Joe.
Thank You for that info, that's a great way to test the filter.
I knew some filters were poor quality filters, and not sure of a way to test them other then looking at user reviews.
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!
*ist, *ist dl polarizer, beam, camera, dl, dl polarizer filter, dslr, filter, photography, polarizer, split
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem with Circular Polarizer filter? malenisjaj Pentax K-5 9 02-05-2014 03:16 AM
Circular or Linear polarizer on mirrorless? ChopperCharles Pentax Mirrorless Cameras 6 12-14-2013 01:02 PM
Circular Polarizer Lens Filter & Focusing redimp Pentax DSLR Discussion 14 11-04-2013 09:03 AM
Does the K-5 need a circular polarizer, or will linear do? mmrempen Pentax K-5 35 09-19-2011 10:08 AM
Circular vs. Linear Polarizer on a K100d? lokerd Pentax SLR Lens Discussion 7 04-03-2009 09:41 PM



All times are GMT -7. The time now is 09:43 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