Zone-System-Grandpa Loc: Springfield, Ohio

Have any of you ever used or do you currently use a matte box rectangular lens shade mounted upon any of your DSLR camera's lenses ?

For those of you that may not be familiar with this type of lens shade, it is most often used upon camcorder lenses and it offers a better method for blocking unwanted light from entering into your lenses whereby the matte box lens shade will often have barn doors upon three or four sides of the box which can be adjusted to prevent unwanted light from entering into a lens, and when adjusted properly, vignetting does not become a problem or vignetting can be purposely added to the image if wanted.

kymarto Loc: Portland OR and Milan Italy

I use one for video. Normally speaking you only have one flag, otherwise things just get too hairy.

imagemeister Loc: mid east Florida

These were very important in the film era and many creative things could be done - and they still have some relevence today. But post processing software has negated much of their usefulness.

kymarto Loc: Portland OR and Milan Italy

Also, a well designed fixed lens shade does the best job of keeping out the sun, since it should shade the maximum without getting in the shot and causing vignetting. It is true, though, that with a zoom lens it has to be designed for the shortest focal length, so in that case it might be possible that a movable flag would be more effective at longer focal lengths.

As to adding vignetting--that is much wiser in post-processing so that all parameters of the vignetting can be controlled.

romanticf16 Loc: Commerce Twp, MI

I also have the Lindhall bellows, but again don't have 77mm adapter rings for it.

I still have mine from my Bronica ETR. It'll fit my older Nikon lenses with 52 and 62mm filter rings, but not the 77mm of most of my new zooms.

lamiaceae Loc: San Luis Obispo County, CA

I think I know hat you are talking about, but no. Having not done videography or cinematography I can't be sure. I've never used one on a film or digital camera, thought they sound similar to the "barn doors" on my old Quartz Lights. I think the product you are asking about looks a bit like a "Cokin Filter System with barn doors or flags."