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09-10-2012, 06:33 PM   #1
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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
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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

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09-10-2012, 07:02 PM   #3
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What is an anti aliasing filter? Someone please help!

What does it do?
09-11-2012, 06:12 AM   #4
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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
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QuoteOriginally posted by alamo5000 Quote
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
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QuoteOriginally posted by Mike V Quote
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
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QuoteOriginally posted by Mike V Quote
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
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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
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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!

QuoteOriginally posted by Couscousdelight Quote
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
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The link said Moire can't be fixed in PP, Have you done it before?
09-11-2012, 10:23 PM - 1 Like   #11
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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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