Series 9 filter system question

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Hi!

What is the biggest filter thread size for Series9 filters? What is the actual diameter of the filter itself?

Thanks :-)

[Jac@stafford.net]

Hi!What is the actual diameter of the filter itself?

The #9 series filter is 3.25 inches (82.6 mm)
It's retaining ring is 3 7/16 inches (87.5mm)

It is usually referred to in inch metrics

The #9 System has #9 as the largest, but there are other series filters that go up to 5 7/16"

[wiggywag]

Is there a brand out there making series 9 filters other than Tiffen, with quality glass?

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Harrison and Harrison.

not anymore...out of business

[Stefaan VB]

Is there a brand out there making series 9 filters other than Tiffen, with quality glass?

I believe Formatt Filters is still making series 9 filters (www.formatt.co.uk).

[Bob Salomon]

Is there a brand out there making series 9 filters other than Tiffen, with quality glass?

Heliopan. They measure 82.6 x 5.6mm. Heliopan makes Series V, 5.5, VI, VII, 7.5L, VIII, IX and 93. But not in all filter types.

[wiggywag]

All my lenses have filter threads and are quite modern. Is there any reason for choosing Series 9 over e.g. Hoya filters set with step up rings for the lenses?