Can the anti aliasing filter be removed from the K5

MikeD · 09-10-2012, 06:33 PM

Adam · 09-10-2012, 06:39 PM - **1 Like**

Yes, by trading it up to a mark II

There's a thread on the topic here, with a link to another thread with even more discussion: https://www.pentaxforums.com/forums/pentax-dslr-discussion/82627-anybody-had-...r-removed.html

alamo5000 · 09-10-2012, 07:02 PM

What is an anti aliasing filter? Someone please help!

What does it do?

titrisol · 09-11-2012, 06:12 AM

It helps prevent Moire effects between pixels, but it somehow softens the images at high reoslution

Anti-aliasing filter - Wikipedia, the free encyclopedia

Mike V · 09-11-2012, 06:13 AM

Originally posted by alamo5000

What is an anti aliasing filter? Someone please help!

What does it do?

In layman's terms, it is the filter that processes the incoming digital signal so that you do not get moire in your images, Why would you want moire? You wouldn't, ever, so why would you want to remove the filter that keeps it from happening? Dunno.

Mike V · 09-11-2012, 06:14 AM

Originally posted by Mike V

In layman's terms, it is the filter that processes the incoming digital signal so that you do not get moire in your images, Why would you want moire? You wouldn't, ever, so why would you want to remove the filter that keeps it from happening? Dunno.

A quick read of this article will lay it all out for you:Nikon D800 vs. D800E

Clavius · 09-11-2012, 06:19 AM

Originally posted by Mike V

In layman's terms, it is the filter that processes the incoming digital signal so that you do not get moire in your images, Why would you want moire? You wouldn't, ever, so why would you want to remove the filter that keeps it from happening? Dunno.

You would want to remove that filter because it will give you a higer resolution / higher IQ image. The low pass filter blurs the total image, not only the parts with the moire.

Moire only happens under certain conditions and is VERY easily fixed locally in PP. I can even imagine eventually inbody software will and remove any moire before writing the file to the SD card.

I doubt that Pentax will suport the removal of the low pass filter though. Then the only advantage of the K-5IIs, and the reason for its pricing, will be gone.

Shelton · 09-11-2012, 09:22 AM

I believe that IR conversions remove the AA (Low Pass) filter and replace it with the IR filter. I have a K20 with the IR conversion and notice no moire artifacts.

Clavius · 09-11-2012, 09:35 AM

Please see the following post and link in this thread: https://www.pentaxforums.com/forums/pentax-k-5/174809-removing-aa-filter-k5.html

It appears that it has been tried without luck!

Originally posted by Couscousdelight

Don't do It !

Klaus from photozone do the same operation, it results a unusable K5 !
Photozone - Pentax K5 tests -

"...The K5 seems to be very unique regarding its AA filter characteristic.
After the AA removal the camera produced "shadowed" images for wide-angle settings.
The service company didn't have an explanation but that was the first time the experienced this problem.
I will get a brand new K5 as a replacement, BTW, so the procedure had no impact on my wallet...."

Hopefully, the new K-5IIs will reveal if there is a way to remove the AA filter from the discontinued K5.

tabl10s · 09-11-2012, 09:27 PM

The link said Moire can't be fixed in PP, Have you done it before?

Clavius · 09-11-2012, 10:23 PM - **1 Like**

All the time with my IR camera. All that a low pass filter does is blur the image. And as we all know, that can be done locally in PP too.

09-10-2012, 06:33 PM	#1
MikeD Veteran Member Join Date: Dec 2007 Location: traverse city MI Posts: 346	Can the anti aliasing filter be removed from the K5 Can the anti aliasing filter be removed from the K5

09-10-2012, 06:39 PM - 1 Like	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,165	Yes, by trading it up to a mark II There's a thread on the topic here, with a link to another thread with even more discussion: https://www.pentaxforums.com/forums/pentax-dslr-discussion/82627-anybody-had-...r-removed.html Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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09-10-2012, 07:02 PM	#3
alamo5000 Pentaxian Join Date: May 2012 Posts: 2,950	What is an anti aliasing filter? Someone please help! What does it do?

09-11-2012, 06:12 AM	#4
titrisol Pentaxian Join Date: Dec 2007 Location: In the most populated state... state of denial Photos: Gallery \| Albums Posts: 1,613	It helps prevent Moire effects between pixels, but it somehow softens the images at high reoslution Anti-aliasing filter - Wikipedia, the free encyclopedia

09-11-2012, 06:13 AM	#5
Mike V New Member Join Date: Jun 2010 Location: California Posts: 8	Originally posted by alamo5000 What is an anti aliasing filter? Someone please help! What does it do? In layman's terms, it is the filter that processes the incoming digital signal so that you do not get moire in your images, Why would you want moire? You wouldn't, ever, so why would you want to remove the filter that keeps it from happening? Dunno.

09-11-2012, 06:14 AM	#6
Mike V New Member Join Date: Jun 2010 Location: California Posts: 8	Originally posted by Mike V In layman's terms, it is the filter that processes the incoming digital signal so that you do not get moire in your images, Why would you want moire? You wouldn't, ever, so why would you want to remove the filter that keeps it from happening? Dunno. A quick read of this article will lay it all out for you:Nikon D800 vs. D800E

09-11-2012, 06:19 AM	#7
Clavius Veteran Member Join Date: Feb 2011 Location: De Klundert Photos: Gallery Posts: 4,133	Originally posted by Mike V In layman's terms, it is the filter that processes the incoming digital signal so that you do not get moire in your images, Why would you want moire? You wouldn't, ever, so why would you want to remove the filter that keeps it from happening? Dunno. You would want to remove that filter because it will give you a higer resolution / higher IQ image. The low pass filter blurs the total image, not only the parts with the moire. Moire only happens under certain conditions and is VERY easily fixed locally in PP. I can even imagine eventually inbody software will and remove any moire before writing the file to the SD card. I doubt that Pentax will suport the removal of the low pass filter though. Then the only advantage of the K-5IIs, and the reason for its pricing, will be gone.

09-11-2012, 09:22 AM	#8
Shelton New Member Join Date: Aug 2009 Location: Connecticut Photos: Gallery Posts: 14	I believe that IR conversions remove the AA (Low Pass) filter and replace it with the IR filter. I have a K20 with the IR conversion and notice no moire artifacts.

09-11-2012, 09:35 AM	#9
Clavius Veteran Member Join Date: Feb 2011 Location: De Klundert Photos: Gallery Posts: 4,133	Please see the following post and link in this thread: https://www.pentaxforums.com/forums/pentax-k-5/174809-removing-aa-filter-k5.html It appears that it has been tried without luck! Originally posted by Couscousdelight Don't do It ! Klaus from photozone do the same operation, it results a unusable K5 ! Photozone - Pentax K5 tests - "...The K5 seems to be very unique regarding its AA filter characteristic. After the AA removal the camera produced "shadowed" images for wide-angle settings. The service company didn't have an explanation but that was the first time the experienced this problem. I will get a brand new K5 as a replacement, BTW, so the procedure had no impact on my wallet...." Hopefully, the new K-5IIs will reveal if there is a way to remove the AA filter from the discontinued K5.

09-11-2012, 09:27 PM	#10
tabl10s Veteran Member Join Date: Jun 2011 Location: Sacramento(formerly from B'Ham, England). Posts: 1,424	The link said Moire can't be fixed in PP, Have you done it before?

09-11-2012, 10:23 PM - 1 Like	#11
Clavius Veteran Member Join Date: Feb 2011 Location: De Klundert Photos: Gallery Posts: 4,133	All the time with my IR camera. All that a low pass filter does is blur the image. And as we all know, that can be done locally in PP too.

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