Do you use the AA filter simulator?

devorama · 07-18-2014, 05:41 PM

Normally I keep the AA filter simulator on OFF. But I was photographing an iPhone 4 that I was going to list on ebay. And I noticed a lot of banding of color artifacts in the white areas. So I set the AA filter to mode 1. That reduced it a bit. Then I tried mode 2. That pretty much eliminated it. I haven't noticed these artifacts on any other photos, so normally it's just OFF.

What setting do normally use?

Adam · 07-18-2014, 06:02 PM - **1 Like**

Same as you- off unless I notice moire. Worst-case, PP moire correction can also be used.

Imageman · 07-18-2014, 06:07 PM

Apologies if misunderstand what happened.

Are you saying that you photographed an iphone screen and was the iphone turned on.

The white areas were they white on the iphone screen.

This sounds like an interference pattern that looks like moire but it isn't, it would be caused by the iphone pixels not matching the sensor pixels and is a pure lcd screen pixel issue.

You can see the exact same effect if you photograph a laptop screen or an lcd tv when its on, you get colour banding and artefacts.

The camera did a splendid job coping if this is what happened and if my guess is right.

devorama · 07-18-2014, 06:10 PM

This is what I saw.

Attached Images

Imageman · 07-18-2014, 06:20 PM

It looks very characteristically like an interference pattern and the camera saw it as moire, since its very similar.

Try your tv screen and a laptop and im sure youll recognise it there.

Cool compensation though

calculator01 · 07-18-2014, 10:16 PM

I couldn't even tell you how to turn this feature on, that's how often I have used it

Winder · 07-18-2014, 10:39 PM

Never even tried it. Taken 30K images with it.

07-18-2014, 05:41 PM	#1
devorama Veteran Member Join Date: Apr 2009 Location: Chicago, IL Photos: Gallery \| Albums Posts: 638	Do you use the AA filter simulator? Normally I keep the AA filter simulator on OFF. But I was photographing an iPhone 4 that I was going to list on ebay. And I noticed a lot of banding of color artifacts in the white areas. So I set the AA filter to mode 1. That reduced it a bit. Then I tried mode 2. That pretty much eliminated it. I haven't noticed these artifacts on any other photos, so normally it's just OFF. What setting do normally use?

07-18-2014, 06:02 PM - 1 Like	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Same as you- off unless I notice moire. Worst-case, PP moire correction can also be used. 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 purchasing one of our Pentax eBooks. 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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07-18-2014, 06:07 PM	#3
Imageman Veteran Member Join Date: Dec 2013 Photos: Albums Posts: 461	Apologies if misunderstand what happened. Are you saying that you photographed an iphone screen and was the iphone turned on. The white areas were they white on the iphone screen. This sounds like an interference pattern that looks like moire but it isn't, it would be caused by the iphone pixels not matching the sensor pixels and is a pure lcd screen pixel issue. You can see the exact same effect if you photograph a laptop screen or an lcd tv when its on, you get colour banding and artefacts. The camera did a splendid job coping if this is what happened and if my guess is right.

07-18-2014, 06:10 PM	#4
devorama Veteran Member Join Date: Apr 2009 Location: Chicago, IL Photos: Gallery \| Albums Posts: 638 Original Poster	This is what I saw. Attached Images

07-18-2014, 06:20 PM	#5
Imageman Veteran Member Join Date: Dec 2013 Photos: Albums Posts: 461	It looks very characteristically like an interference pattern and the camera saw it as moire, since its very similar. Try your tv screen and a laptop and im sure youll recognise it there. Cool compensation though

07-18-2014, 10:16 PM	#6
calculator01 Veteran Member Join Date: Nov 2010 Location: Edmonton, Alberta Photos: Albums Posts: 817	I couldn't even tell you how to turn this feature on, that's how often I have used it

07-18-2014, 10:39 PM	#7
Winder Veteran Member Join Date: Apr 2010 Location: Tennessee Posts: 6,617	Never even tried it. Taken 30K images with it.