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**JimD** · 05-08-2012, 03:13 AM

I'm considering a Hoya pro digital cpl. I've got three at smaller sizes and find them excellent.

However would a filter on the da 12-24 cause vignetting? I notice there is no window for filter adjustment in the lens hood.

No discussion's on the pro's & con's of filters. Please

twitch · 05-08-2012, 03:25 AM

A CPL will cause uneven coloring in the sky on a DA12-24

hoanpham · 05-08-2012, 03:34 AM

No need for a CPL on this lens. It's better in post processing, boosting sky color to darker blue.

**JimD** · 05-08-2012, 03:40 AM

Originally posted by twitch

A CPL will cause uneven coloring in the sky on a DA12-24

Why is that?

hoanpham · 05-08-2012, 04:04 AM

See sample photo from this thread.
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/184524-issue-u...ml#post1935086

Very common issue, physical limitation.

**JimD** · 05-08-2012, 04:23 AM

Originally posted by hoanpham

See sample photo from this thread.
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/184524-issue-u...ml#post1935086

Very common issue, physical limitation.

Cheers. I've been away for the past week and missed this.

Save myself £60 now

JohnX · 05-08-2012, 05:43 AM

Originally posted by JimD

Cheers. I've been away for the past week and missed this.

Save myself £60 now

Don't discount a CPL immediately on the 12-24. Polarisation varies across the sky in relation to position of the sun (relative to the 'tog). There will be some instances where the effect will be hardly noticeable, if at all, others where it will be exaggerated. The more sky in the picture the more likely the effect will be seen. The example shown is, in my view, somewhat extreme. The CPL may still prove useful removing reflections from leaves, water, etc.

northcoastgreg · 05-08-2012, 07:40 AM

Originally posted by JohnX

Don't discount a CPL immediately on the 12-24

I agree with that. Polarizers can often be used with minimal issues in the 20 to 24 range and, on partly cloudy days, sometimes all the way to 12mm. Depending on the angle of the sun, polarizers can also be used in portrait orientation at 12mm as well.

When I owned a 12-24, I kept a polarizer on it all the time and rarely ran into trouble.

ohce · 05-09-2012, 06:34 PM

JimD, see my post here.
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/184524-issue-u...ml#post1934560

05-08-2012, 03:13 AM	#1
JimD Site Supporter Join Date: Feb 2011 Location: Newport, South Wales Posts: 187	Filter on DA 12-24 I'm considering a Hoya pro digital cpl. I've got three at smaller sizes and find them excellent. However would a filter on the da 12-24 cause vignetting? I notice there is no window for filter adjustment in the lens hood. No discussion's on the pro's & con's of filters. Please

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05-08-2012, 03:25 AM	#2
twitch Veteran Member Join Date: Nov 2009 Posts: 4,571	A CPL will cause uneven coloring in the sky on a DA12-24

05-08-2012, 03:34 AM	#3
hoanpham Veteran Member Join Date: Nov 2009 Location: Strand Photos: Gallery \| Albums Posts: 1,366	No need for a CPL on this lens. It's better in post processing, boosting sky color to darker blue.

05-08-2012, 03:40 AM	#4
JimD Site Supporter Join Date: Feb 2011 Location: Newport, South Wales Posts: 187 Original Poster	Originally posted by twitch A CPL will cause uneven coloring in the sky on a DA12-24 Why is that?

05-08-2012, 04:04 AM	#5
hoanpham Veteran Member Join Date: Nov 2009 Location: Strand Photos: Gallery \| Albums Posts: 1,366	See sample photo from this thread. https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/184524-issue-u...ml#post1935086 Very common issue, physical limitation.

05-08-2012, 04:23 AM	#6
JimD Site Supporter Join Date: Feb 2011 Location: Newport, South Wales Posts: 187 Original Poster	Originally posted by hoanpham See sample photo from this thread. https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/184524-issue-u...ml#post1935086 Very common issue, physical limitation. Cheers. I've been away for the past week and missed this. Save myself £60 now

05-08-2012, 05:43 AM	#7
JohnX Pentaxian Join Date: Jul 2009 Location: London Posts: 1,116	Originally posted by JimD Cheers. I've been away for the past week and missed this. Save myself £60 now Don't discount a CPL immediately on the 12-24. Polarisation varies across the sky in relation to position of the sun (relative to the 'tog). There will be some instances where the effect will be hardly noticeable, if at all, others where it will be exaggerated. The more sky in the picture the more likely the effect will be seen. The example shown is, in my view, somewhat extreme. The CPL may still prove useful removing reflections from leaves, water, etc.

05-08-2012, 07:40 AM	#8
northcoastgreg Pentaxian Join Date: Feb 2010 Location: Northern Michigan Photos: Gallery \| Albums Posts: 6,176	Originally posted by JohnX Don't discount a CPL immediately on the 12-24 I agree with that. Polarizers can often be used with minimal issues in the 20 to 24 range and, on partly cloudy days, sometimes all the way to 12mm. Depending on the angle of the sun, polarizers can also be used in portrait orientation at 12mm as well. When I owned a 12-24, I kept a polarizer on it all the time and rarely ran into trouble.

05-09-2012, 06:34 PM	#9
ohce Veteran Member Join Date: Nov 2007 Photos: Gallery Posts: 477	JimD, see my post here. https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/184524-issue-u...ml#post1934560

Filter on DA 12-24

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