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circular polarising filter

PostPosted: Mon Feb 06, 2006 11:16 pm
by rookie2
in bright blue sky beach conditions I played around with a CPL yesterday on my kit lens. when downloaded and in RAW state there was a noticeable hazy/spotty/washed out section running across the horizon just above the waterline.
this wasnt evident in the jpegs tho

any explanations why this happened (CPL was on 'darkest' setting)

thanks for any feedback.
cheersR2

"If I dont ask, I'll stay as dumb as everyone thinks I am" :?

PostPosted: Mon Feb 06, 2006 11:28 pm
by gooseberry
rookie2,

do you have a sample image to show ? kind of hard to figure out what you mean without an example.

CPL

PostPosted: Mon Feb 06, 2006 11:39 pm
by rookie2
I was hoping it might be a common issue (not requiring an image) that us rookies are not aware of - also I am on dial up and still developing a qucik workflow getting images onto the web.


I'll get back soon..just have to dig one up but once I transfer to a jpeg will probably lose the effect anyway.

I did find out I had a bad case of dust bunnies tho - - the CPL and small aperture made sure of that! now have to research another area.

CU soon

R2

CPL fuzz & dust bunnies help img

PostPosted: Tue Feb 07, 2006 12:03 am
by rookie2
Image
it doesnt show up so much here as I thought but I only cropped a small section to protect the identity of the subject ....- a lot more wash out/messy colour is evident in the RAW files.
25mm 1/200 f10 ISO 200

I was just curious as to what causes it..and try top avoid it down the line.

at least I found out that I had dust on the CCD!!!

thnaks for looking anyway.

cheersR2 :?