[Jackoan]

This is probably a stupid question but when I look at a my 10 to 22 mm lens with cannon EF lens at the 12 o-clock position at the 8 o-clock position there is a circle with a line through it and 77mm beside it. Is this the thread size of the filter ring and if I buy a 77mm filter will it fit
Jack

[silkstone]

Hi Jack and welcome to Pixalo.

The answer is yes. The Canon 10-22 takes a 77mm filter. The symbol is Ø which is the scientific/engineering character meaning 'diameter'.

[Jackoan]

Thank you for the quick answer I can now order one knowing that it will fit, is this information on all lens or is there a reference table somewhere that supplies it. Again thank you for the quick reply
Jack

[silkstone]

The filter thread diameter should appear on the lens - usually on the front as with the 10-22. If in doubt, please ask!

Before you order one, if you'd like to tell us what filter(s) you were thinking of, we may be able to make some suggestions. A super-wide lens like the 10-22 can be rather fussy when it comes to filters.

[Jackoan]

Sorry it took so long to come back had to go out for a short time The filter I looked at was the, Hoya 77mm Circular Polarizing Glass Filter from one stop digital. currently out of stock. but I am prepared to wait or use jessops which is where I got the camera A 400D
Jack

[silkstone]

Right... that's fine except you may get some strange effects when using a polariser at a focal length as wide as 10mm. The effect of the PL - e.g. to darken a blue sky, varies according to the angle of the sun, and with a very wide field of view the angle will vary considerably from one side of the image to the other. That means you may get a variation in the effect across the width of the picture.

The other thing to watch for is vignetting (darkening of the corners) when using a filter. I'm not saying 'don't do it', but be aware of the pitfalls!

[Jackoan]

I have been surfing other sites Jessops, Foto sense Amason,and find a wide and confusing range of filters and prices, It would appear that I need a bit more thought on the subject as I would not like to shell out cash for something that I then find is not doing what I thought it would.
Jack

[silkstone]

OneStop are likely to be good on price - based in Hong Kong - but even so a 77mm PL-CIR isn't cheap. It's your call and others may disagree, but personally I wouldn't use one on a super-wide lens.

[Jackoan]

Thanks for your help and advice Silkstone you have given me a bit to think about
Jack

[Dabhand16]

I've got a Kood polorising filter to use with My Sigma 10-20, and I don't notice vignetting, but I know some use the Hoya super-pro filters (or whatever they are called) for wide angle lenses due to the very thin profiles they have.

I have to say in some conditions the polorising filter does make for uneven sky tones, but not always - it depends on the position of the Sun and what focal length you are using.