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photoleet · 10-15-2011, 06:26 PM

Took this today with a FA50 1.4 I recently acquired.

Here's the common EXIF from these shots

Creation date: 10/15/2011 16:40
Camera: PENTAX K-x
Lens: smc PENTAX-FA 50mm F1.4
Focal length: 50 mm (equiv. 75 mm)
Aperture: F1.4
Program: Aperture Priority
Metering Mode: Pattern
White Balance: Auto
Focus Mode: AF-S
Image Stabilizer: stabilized
Noise Reduction: Off
Flash: Flash did not fire, compulsory flash mode

The day shot is ISO 100, night are ISO 1600/800. Shutter speed is set by the camera.

Adam · 10-15-2011, 06:31 PM

When the shot is taken wide-open and it ends up being overexposed, heavy PF is perfectly normal. You can also expect PF near bright edges when shooting wide-open.

rawr · 10-15-2011, 07:01 PM

As Adam says, purple fringing can be an issue when shooting wide open and there are very bright areas against contrasty dark areas. Use of poor quality UV protector filters can also make the problem appear worse.

Stop the aperture down a notch and the PF will usually go away. You can also correct this in post-processing quite easily using Lightroom, DxO, PDCU etc.

10-15-2011, 06:26 PM	#1
photoleet Veteran Member Join Date: Jul 2011 Location: DMV Photos: Albums Posts: 431	FA50 F1.4 Purple Fringing like this expected ? Took this today with a FA50 1.4 I recently acquired. Here's the common EXIF from these shots Creation date: 10/15/2011 16:40 Camera: PENTAX K-x Lens: smc PENTAX-FA 50mm F1.4 Focal length: 50 mm (equiv. 75 mm) Aperture: F1.4 Program: Aperture Priority Metering Mode: Pattern White Balance: Auto Focus Mode: AF-S Image Stabilizer: stabilized Noise Reduction: Off Flash: Flash did not fire, compulsory flash mode The day shot is ISO 100, night are ISO 1600/800. Shutter speed is set by the camera.

10-15-2011, 06:31 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,609	When the shot is taken wide-open and it ends up being overexposed, heavy PF is perfectly normal. You can also expect PF near bright edges when shooting wide-open. 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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10-15-2011, 07:01 PM	#3
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	As Adam says, purple fringing can be an issue when shooting wide open and there are very bright areas against contrasty dark areas. Use of poor quality UV protector filters can also make the problem appear worse. Stop the aperture down a notch and the PF will usually go away. You can also correct this in post-processing quite easily using Lightroom, DxO, PDCU etc.

FA50 F1.4 Purple Fringing like this expected ?

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