filter sizes for pentax camera

[Jenelle Woolaway]

Hi all,
I am looking at getting a ND filter and possibly a polarizing filter for my Pentax K20D.
I have a Tamron AF18-200mm F/3.5-6.3 XR Di II A14 (http://www.tamron.com.au/di-ii18-200_a14.html) lens which is what came with the camera.
the specs only give the size for Nikon mount not the Pentax one.

Any advice would be much appreciated.

Jen
total Newbie

[ricktas]

look inside the lens cap, it should have the filter size printed in there. It will be like 72mm / 68mm etc

[I @ M]

It will almost certainly be the same size as the Canon, Nikon or Sony versions.
It would be rather unusual for the filter size to differ between them, the mounting ( camera ) end is where the big differences are but to be totally sure a quick email to Maxwells who are the importers should get a definitive response.

http://www.maxwell.com.au/support/tamron.html

[Rattus79]

My advice is to get the biggest filter you can and get stepping rings to go back to your lens size.

That way if/when you get new lenses, your existing filters will fit.

[Jenelle Woolaway]

thanks for your help guys

Jen:)

[Boo53]

This page http://www.tamron.com.au/di-ii18-200_a14.html gives the filter Dia as 62mm

[ricktas]

Hope that now we have helped you, you can return the favour and give some other members photos a critique or two?

[mongo]

Mongo agrees with Greg but would only go one size larger with a step down ring rather than the biggest you can get. Either way, it is a good idea to get a slightly larger one