Parallel lines in bokeh

[joeyao]

Hi

My Hoya 77mm HMC UV-GUARD filter attached to my EF 300mm f/4 L IS lens with the 1.4X II TC causes parallel lines to appear in the bokeh. Appreciate if anyone can recommend me a better brand of filter that do not have such a problem. Thanks.

Joe

[sulhan]

Originally Posted by joeyao Hi My Hoya 77mm HMC UV-GUARD filter attached to my EF 300mm f/4 L IS lens with the 1.4X II TC causes parallel lines to appear in the bokeh. Appreciate if anyone can recommend me a better brand of filter that do not have such a problem. Thanks. Joe

Hiee...

Just out of curiosity.....have you tried without any filter on???


rgds,
sulhan

[Garion]

Originally Posted by joeyao Hi My Hoya 77mm HMC UV-GUARD filter attached to my EF 300mm f/4 L IS lens with the 1.4X II TC causes parallel lines to appear in the bokeh. Appreciate if anyone can recommend me a better brand of filter that do not have such a problem. Thanks. Joe

Try B+W UV-Haze filters. A 77mm one costs ard $90. Best solution of course is not to use any filters at all.

[joeyao]

Originally Posted by Garion Try B+W UV-Haze filters. A 77mm one costs ard $90. Best solution of course is not to use any filters at all.

You mean experts like you do not use filters?

[joeyao]

Originally Posted by sulhan Hiee... Just out of curiosity.....have you tried without any filter on??? rgds, sulhan

Yep, no filter no lines

regards
Joe

[Garion]

Originally Posted by joeyao You mean experts like you do not use filters?

I'm not an expert. I do use UV filters to protect the front elements of most of my glass. Filters cause some amount of degradation in optical quality, depending on the brand and the type of glass used in it, from my experience B+W is one of the best because it causes very little drop in image quality and is better than Hoya filters in that respect.

Just my 2cts.

[Terence]

Hey Joe,

You got me frightened for a moment with your SMS.

I've had a Hoya UV on that lens with no problems. Does your filter do the same to your other lenses?

[sulhan]

Originally Posted by Terence Hey Joe, You got me frightened for a moment with your SMS. I've had a Hoya UV on that lens with no problems. Does your filter do the same to your other lenses?

Hiee...

From previous experiences.... filters do have adverse effects which degrades image quality.....even using $$$$$ filters does not guarantee you the best quality as compared to "native" front element type of image.

Well....just like the Sigma 70-300mm APO MAcro......many complained it to be soft..etc...its because of the front "extra glass ~ filter"...

Characteristics of lens change.....with additional material/glass....

rgds,
sh