 Sue Cantan |
polarizing filter problem I have a Hoya circular polarizing filter on my Nikon D70 that I use with my 18-70mm lens. It is causing vignetting. The polarizing filter on my 70-300mm lens does not seem to have the same problem. Is it a function of the other lens being wide angle? Is there anything I can do about it? Thanks
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Pete H |
Hello Sue, This is typical for wide angle lenses due to light "falloff." The effect is exaggerated with a polarizer. I know of only two remedies. 1) A (center) darkening filter. This filter essentially darkens the center portion of the image to balance the light falloff at the corners. 2) Post processing to the rescue. Many of the better post processing programs such as Adobe have a vignette control...easy and works quite well. Hope that helps a little.
Pete
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- Carlton Ward Contact Carlton Ward Carlton Ward's Gallery |
Hello Sue, I am not familiar with the Hoya CP but the 1st one I bought was not a top quality filter and I had some problems with it as well with color & vignetting. I since bought a B + W Kaesemann Circular Polarizer and there is a huge difference. Colors are great and I have not noticed any vignetting on my 17-40mm lens. The B&W and Heliopan are regarded as the some of the best made filters but they are more expensive.
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John P. Sandstedt |
The problem has nothing to do with the manufacturers of the polarizer. It has to do with the size of the sensor on you camera. I have a wide angle [thin] Tiffen polarizer I purchased for use on my Canon EOS 3 fitted with a Tamron 28-200 mm zoom lens. It has a 72 mm filter thread. No vignetting issues. When I use it on my Canon 30D with its 17-85 mm IS zoom [67 mm filter thread,] I use a 67 to 72 step up filter. Despite the step-up, vignetting occurs at wide angle settings because the added length intrudes on the field of view of the sensor. Be prepared to crop or try using the anti-vignetting tool in Photoshop.
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Sue Cantan |
Thanks for all the good advice. I realized on re-reading my post that I said I have a Nikon D70-oops, I actually have a D50! I'm sure it doesn't make a difference to my problem though. I'll check at the camera store today and see if I can afford a different brand of filter.
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