Glass Filter Sizes
Formatt Filters' range of glass filters
and HD glass filters
are available in a wide range of sizes for any application; whether for film, video or high definition use. The entire glass filter range is manufactured both as circular filters (which screw directly into the lens) and rectangular/square filters (which are used with a matte box
Circular glass filters screw directly into the lens or camera. Every camera or lens should have a screw adaptor into which the filter can be screwed. It is possible to layer filters in this way but care should be taken to avoid vignietting, and where possible a matte box should be used.
If purchasing circular filters you will need to know the size of the lens into which the filter is screwed. Formatt makes screw-in filters for all popular lens sizes:37mm, 40.5mm, 43mm, 48mm, 52mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, 86mm, 94mm, 95mm, 105mm, 125mm, 127mm
Note that as camera manufacturers continually change lens sizes, that this list changes regularly. If you have a different sized lens or camera we may be able to make a custom ring to fit, even if not in the above list.
When purchasing a polarizer filter this may be supplied in a rotating ring, enabling the filter to be rotated until the required effect is achieved.
In addition Formatt Filters make the following sizes of circular filters which do not incorporate a screw-in ring, but are designed to drop into a matte box: Series 9, 4 ", 138mm, 152mm
Rectangular and Square Filters
Rectangular and square glass filters are manufactured in a range of sizes in order to accommodate the wide diversity of matte boxes available in the market, and the different formats of cameras: 3x3", 4x4", 4x5.65" (also known as a Panavision size), 5x5", 5.65x5.65", 6.6x6.6".
Other sizes may also be readily custom made.Please note:
Rectangular and square filters are only designed to use with a matte box
which attaches to the front of the camera using a screw-in or clamp on adaptor, with the larger matte boxes having additional support systems such as bars and bridge plates. Matte boxes may have multiple filter holders enabling 2, 3 or even more filters to be used at the same time.
For more information, please see this filter sizes PDF