Lee Filters 4" Cardboard Mounts for 3x3" Filters, 10-Pack

2015-05-17T21:00:00

I had a bunch of older 75mm x 90mm gradual and standard ND filters I had picked up very cheap at a garage sale. I wanted to try to re-use some of them with my new 4x4 matte box. These Lee Cardboard mounts were perfect. Even though my filters were closer to 3.25" x 3.75", these mounts still worked great. The adhesive is strong and has held fine about 4 days now with no sign of weakening. With the filters being almost 4 inches long, the top and bottom edges are almost as thick as the filter and cardboard combined. So it's just barely thin enough to work with my filter holders. If you had true 3"x 3" filters this wouldn't be the case. Still isn't a problem for me. This is obvious, but be careful of moisture with these. I occasionally film in adverse weather. I'd leave these in the bag for those times. They are just cardboard. I have tried them on several lenses with my Sony FS700's Super35mm sensor (approx. 1.5 crop factor). With my Canon 24-105L F4 IS at it's widest 24mm, there is no hint of vignetting. With my Sony E PZ 18-105 F4 lens at 18mm there is a little bit of vignetting from the sides of the cardboard mounts that dissapears at about 20mm. So, long run I'll need to acquire some more real 4x4 filters for my wider lenses. But these mounts just bought me some time since I rarely use my wide angle lenses.

Big D.