Well made, excellent coatings, and work as advertised. Reflect IR and pass full spectrum. Recommended!

Most modern filters have dual band coatings that blocks both UV and IR. I have a UV photography application that requires a filter that blocks IR but transmits UV. Found this classic Tiffen as a used item in KEH's Amazon store. I've dealt with KEH directly for many years: they are the single most respected source for high quality used photographic gear.So I pulled the trigger, and got a filter with immaculate coatings, which performs flawlessly. I'm happy. Thanks KEH, and thanks Amazon.

I have a full spectrum converted camera. I was hoping to use this filter to allow me to take normal pictures and footage with it. No sir.This filter barely blocks out any infrared light. It doesn’t work like the actual hot mirror filters on most camera sensors. It lets in way way too much for “normal” camera use.Not badly built however ¯_(ツ)_/¯ but it’s only a filter.If you’d like to use it to convert your full spectrum camera back to normal on occasion, look elsewhere.

Does what is says on the tin. I use mine with a full-spectrum camera and an IR absorption filter (S8612), to turn the full-spectrum camera back to being a normal visible light camera.

There are a few of us who like to use old technology for its own sake. Maybe its the challenge of 'massaging' old technology to try to get state-of-the-art results out of obsolete equipment, maybe it is nostalgia for some. For me, it was a combination of wanting to save a few bucks while getting the best possible image quality. Several years ago I bought a very-used KodaK / Nikon DCS330 digital camera to wrap around several IX-Nikkor APS lenses I own. My how things have changed since this camera first appeared in 1997! The size is large, very large, even though the camera body Kodak used as a base is the 'smaller' Nikon Pronea 6i, which was an APS (remember that failed format??) unit. And it is very power-hungry: I eats 6 AA batteries so quickly (and so expensively) that the only practical solution is an external battery pack, in my case a used Quantum Battery 2, now discontinued, with a coiled cord tethering the two together.Why bother with all this stuff when you can get a small, faster, more-megapixelated camera? In short, Image quality. The color rendition, depth, saturation, and sharpness of the images taken with this camera are simply outstanding. I'm more than willing to put up with its 3.0 megapixel resolution to get what I consider to be the finest quality digital picture I've ever seen. Its hard to explain, but the picture is 'warm,' unlike the super-accurate and to my eyes cold rendering of most digital cameras. The DCS330 is more like film in warmness , albeit the intrusive graininess.But there are drawbacks. Size and weight of all this stuff is one, having to use an external power supply on your belt is another, and its need for this item being reviewed, a 'hot mirror,' is a third. A hot mirror is a special filter needed in early digital cameras to block infrared light from reaching the CCD sensor. Today, this technology is either built-in or isn't needed because of technological improvements, I'm not sure which. But the old digitals need this filter, or the image will have a reddish cast to it. The Kodak DCS330 had one built-in in front of the mirror inside the body, but it had to be removed to use IX-Nikkor APS lenses for which the Nikon body was originally designed, otherwise the lens, with its extra-deep seating within the camera body, would break the built-in hot mirror. Kodak said you can't use the IX-Nikkors; yes you can, but the internal hot mirror must first be removed and replaced with a lens-mounted version like this Tiffen.And that's all there is to tell. You need one of these if you are considering an older professional-grade Kodak digital with IX-Nikkor lenses, or if for any reason there is a need to replace the built-in hot mirror with a conventional lens-mounted hot mirror filter. Unless you like red-toned pictures, that is. The Tiffen does a great job, is of good quality. This part is pricey, but that may reflect the lowered demand and consequent higher cost per unit to produce. For people like me who simply enjoy playing with old, technologically-obsolete weirdo camera equipment, Tiffen's continuing production of this and similar filters for obsolete technology is a godsend.