PROfezzion 67 mm, 99.5 per cent transmission, 0.7 mm glass
The only filter on this shelf that publishes what it passes — 99.5 per cent on twelve layers, through 0.7 mm of glass in a 3 mm frame, for 13 €.
- Thread size
- 67 mm, in the title, which also names Canon R6 Mark III, II, 90D, 80D and 70D bodies. Naming bodies on a filter is loose — a filter fits a thread, not a camera — but it tells a buyer the size is the common one for those kits
- Glass
- Japanese optical glass, finely ground and polished, in the third bullet, with a hardness given as up to 9HD. The hardness notation is unusual and unexplained on the page; what it is reaching for is scratch resistance on the surface that gets wiped most
- Coating description
- TWELVE layers, multi-coated, in the second bullet, to prevent internal ghosting and reflections. Fewer than the eighteen claimed by the 11 € K&F here — and unlike that page, this one publishes the result the layers produce
- Frame thickness
- BOTH figures published, and this is the page that measures itself: the GLASS is 0.7 mm thick and the FRAME only 3 mm, in the fourth bullet, stated as minimising the likelihood of vignetting. Three millimetres is the thinnest frame on this shelf, against 3.4 mm on the Hama and nothing at all from the two others
- Material
- An aviation-grade aluminium alloy frame, in the third bullet — the only frame alloy named on this shelf
- Front thread provision
- Not mentioned, which on a 3 mm frame is worth noting: the thinner the ring, the less room for a front thread, and the page does not say whether a cap or hood still screws on
- Stated transmission figure
- PUBLISHED — an average light transmission of AT LEAST 99.5 PER CENT, in the second bullet, and the only such figure on this shelf. It is the number that makes the coating count meaningful: twelve layers passing 99.5 per cent is a measurable claim, where eighteen layers and no percentage is an assertion
- Amazon reference
- B09366T36S (same reference on 6 Amazon marketplaces)
- EAN
- 6940202350425
- Ninety-nine point five per cent transmission published — alone on this shelf
- Both thicknesses published: 0.7 mm of glass in a 3 mm frame, the thinnest here
- No front thread provision mentioned, on the thinnest frame here
Best for: A 67 mm lens used at its widest, where a 3 mm frame and a measured transmission are worth 4 € over the cheapest lid on this shelf.