Extra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Extra narrowband SII-CCD 6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

The H-ALPHA 7nm filter is the most popular narrow-band filter that allows a 7nm bandwidth centered on a 656nm wavelength.

Extra narrowband SII-CCD 6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Extra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

The H-ALPHA 7nm filter is the most popular narrow-band filter that allows a 7nm bandwidth centered on a 656nm wavelength.

Extra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Extra narrowband SII-CCD 6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

A multi-tool designed for camping, hiking and any type of outdoor adventure!

An essential tool for EMTs or first responders with a 154CM serrated blade and a carbide glass break bit.

Crafted for everyday adventures, it features crucial tools including upgraded, replaceable wire cutters.

An EDC multipurpose tool built for every hand.

The most compact offering in the FREE™ family, the T2 is small but mighty. At just 3.3 ounces, it fits easily in your pocket or purse, but punches well above its weight when it comes to performance. Packing eight total tools and integrated FREE™ technology, the T2 redefines approachability. Compatible pocket clip sold separately. Designed and built in Portland, Oregon.

Maximum utility, minimum space.

The T4 proves once and for all that big things do come in small packages. With all the assets of the T2—plus scissors, tweezers, and a heavy duty file—the T4 was designed with everyday problem solving in mind. It might just be our most universal tool to date. Comes with a pocket clip attached for easy access. Proudly built in Portland, Oregon and covered by our 25-year warranty.

If you’re looking for maximum functionality, look no further.

Designed for unmatched comfort, durability, and ease-of-use, the P2 represents decades of consumer feedback, testing, and engineering. Integrated FREE™ technology means all 19 tools are easily accessed with one hand, open smoothly, and click into place with a confident snap. Proudly made in Portland, Oregon.

Say hello to the most advanced multipurpose tool ever made.

A more robust version of the P2, the P4 also includes a saw and 420HC serrated knife so you’re prepared for every job. Even with 21 tools, it weighs in at a barely-there 8.6 ounces and has a closed length of just 4.25 inches, so it’s just as comfortable in your pocket as on your belt. Designed and manufactured in Portland, Oregon.

Lightweight and portable, the FREE™ K2 packs essential, everyday tools into a folding pocket knife.

With a 3.3 inch blade and seven additional tools, including a pry tool and Phillips screwdriver, the K2 is multipurpose redefined. Each implement is housed on the outside of an ergonomically refined aluminum body for easy access, so you’re never left fumbling in a pinch. Made proudly in Portland, Oregon and covered by our 25-year warranty.

Lightweight and portable, the FREE™ K2 packs essential, everyday tools into a folding pocket knife.

With a 3.3 inch blade and seven additional tools, including a pry tool and Phillips screwdriver, the K2 is multipurpose redefined. Each implement is housed on the outside of an ergonomically refined aluminum body for easy access, so you’re never left fumbling in a pinch. Made proudly in Portland, Oregon and covered by our 25-year warranty.