15mm Limited Polarizer

Skipper74 · 01-16-2013, 09:51 PM

Anyone have any idea on which polarizer I would need for my Pentax 15mm limited?.

Finn · 01-16-2013, 10:18 PM

Well, it's got a 49mm filter thread, but be aware that using a CPL on a lens that wide gives a...unique look to the sky. Just something to be aware of.

Skipper74 · 01-16-2013, 10:20 PM

Ok good to know. Would you recommend a filter?

**Digitalis** · 01-16-2013, 10:42 PM

There is no point in spending more for the slim frame polarisers - the DA15 doesn't suffer from vignetting from normal ones in the first place. Hoya, B+W and Heliopan are highly regarded makers

Skipper74 · 01-16-2013, 10:44 PM

What about a filter though?

steve1307 · 01-17-2013, 01:58 AM

The B+W slim CPL actually fouls on the inside surface of the DA15s hood due to the knurling on the filter ring.
The standard version of the CPL filter is fine though.
B+W, Hoya (the Japan ones not the cheap Philippines one) , Marumi, Heliopan all good. Multicoated versions.
Kaesmann type are sealed to prevent moisture getting in between foils, maybe needed only in extreme condensing weather.

Vignetting is minimal. The CPL is on the lens in the pic with hood extended.

**fs999** · 01-17-2013, 02:40 AM

I use a 49 to 72mm converter and a 72mm Hoya Pro1 CPL I already had. No vignetting at all

**southlander** · 01-17-2013, 03:23 AM

As Finn suggested, be aware that the wide field of view of the DA15 will result in an uneven sky if you are planning to use the CPL to take panoramic images with clear skies. This is due to the fact that the level of polarisation of light varies with the angle away from the sun. Maximum effect of the CPL is at approx. 90 degrees to the sun and lessens either side of that. I reminded myself of this out about a week ago using the wide end of my Tamron 17-50mm with a CPL to photograph coastal scenes. Shorter focal lengths than say mid 20's mm increasingly produced an unnatural variation in the intensity of the blue sky. Longer focal lengths were fine.

Not so much of an issue though for cutting down reflections off close up subjects or with overcast but glare filled days.

Finn · 01-17-2013, 07:31 AM

Originally posted by southlander

As Finn suggested, be aware that the wide field of view of the DA15 will result in an uneven sky if you are planning to use the CPL to take panoramic images with clear skies. This is due to the fact that the level of polarisation of light varies with the angle away from the sun. Maximum effect of the CPL is at approx. 90 degrees to the sun and lessens either side of that. I reminded myself of this out about a week ago using the wide end of my Tamron 17-50mm with a CPL to photograph coastal scenes. Shorter focal lengths than say mid 20's mm increasingly produced an unnatural variation in the intensity of the blue sky. Longer focal lengths were fine.

Not so much of an issue though for cutting down reflections off close up subjects or with overcast but glare filled days.

This was taken with a DA21mm. A 15 would be even more pronounced. Just FYI...

Skipper74 · 01-17-2013, 09:38 PM

Thanks for all of the advice

01-16-2013, 09:51 PM	#1
Skipper74 Junior Member Join Date: Sep 2012 Posts: 34	15mm Limited Polarizer Anyone have any idea on which polarizer I would need for my Pentax 15mm limited?.

01-17-2013, 01:58 AM	#6
steve1307 Veteran Member Join Date: Mar 2010 Location: Sydney Photos: Gallery \| Albums Posts: 1,130	The B+W slim CPL actually fouls on the inside surface of the DA15s hood due to the knurling on the filter ring. The standard version of the CPL filter is fine though. B+W, Hoya (the Japan ones not the cheap Philippines one) , Marumi, Heliopan all good. Multicoated versions. Kaesmann type are sealed to prevent moisture getting in between foils, maybe needed only in extreme condensing weather. Vignetting is minimal. The CPL is on the lens in the pic with hood extended. Last edited by steve1307; 01-17-2013 at 02:03 AM. Reason: picture added

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01-16-2013, 10:18 PM	#2
Finn Veteran Member Join Date: Feb 2007 Location: Phoenix Photos: Gallery Posts: 1,056	Well, it's got a 49mm filter thread, but be aware that using a CPL on a lens that wide gives a...unique look to the sky. Just something to be aware of.

01-16-2013, 10:20 PM	#3
Skipper74 Junior Member Join Date: Sep 2012 Posts: 34 Original Poster	Ok good to know. Would you recommend a filter?

01-16-2013, 10:42 PM	#4
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	There is no point in spending more for the slim frame polarisers - the DA15 doesn't suffer from vignetting from normal ones in the first place. Hoya, B+W and Heliopan are highly regarded makers

01-16-2013, 10:44 PM	#5
Skipper74 Junior Member Join Date: Sep 2012 Posts: 34 Original Poster	What about a filter though?

01-17-2013, 02:40 AM	#7
fs999 Loyal Site Supporter Join Date: Jul 2008 Location: Luxembourg Photos: Gallery Posts: 8,646	I use a 49 to 72mm converter and a 72mm Hoya Pro1 CPL I already had. No vignetting at all

01-17-2013, 03:23 AM	#8
southlander Site Supporter Join Date: May 2012 Location: Adelaide Photos: Gallery \| Albums Posts: 1,364	As Finn suggested, be aware that the wide field of view of the DA15 will result in an uneven sky if you are planning to use the CPL to take panoramic images with clear skies. This is due to the fact that the level of polarisation of light varies with the angle away from the sun. Maximum effect of the CPL is at approx. 90 degrees to the sun and lessens either side of that. I reminded myself of this out about a week ago using the wide end of my Tamron 17-50mm with a CPL to photograph coastal scenes. Shorter focal lengths than say mid 20's mm increasingly produced an unnatural variation in the intensity of the blue sky. Longer focal lengths were fine. Not so much of an issue though for cutting down reflections off close up subjects or with overcast but glare filled days.

01-17-2013, 07:31 AM	#9
Finn Veteran Member Join Date: Feb 2007 Location: Phoenix Photos: Gallery Posts: 1,056	Originally posted by southlander As Finn suggested, be aware that the wide field of view of the DA15 will result in an uneven sky if you are planning to use the CPL to take panoramic images with clear skies. This is due to the fact that the level of polarisation of light varies with the angle away from the sun. Maximum effect of the CPL is at approx. 90 degrees to the sun and lessens either side of that. I reminded myself of this out about a week ago using the wide end of my Tamron 17-50mm with a CPL to photograph coastal scenes. Shorter focal lengths than say mid 20's mm increasingly produced an unnatural variation in the intensity of the blue sky. Longer focal lengths were fine. Not so much of an issue though for cutting down reflections off close up subjects or with overcast but glare filled days. This was taken with a DA21mm. A 15 would be even more pronounced. Just FYI...

01-17-2013, 09:38 PM	#10
Skipper74 Junior Member Join Date: Sep 2012 Posts: 34 Original Poster	Thanks for all of the advice