Purosol Flat Panel Screen Cleaner was originally developed for NASA and the US military for use on high-end, multi-coated optics. Combining the power of organic plant extracts and green chemistry, it can be used on your television, computer display, smartphone, or touchscreen device.

Streak-Free    Anti-Static Barrier    Repels Dust    Clean Your Screen Less Frequently

Purosol's unique nanotechnology cleaning formula incorporates nitrogen blanketing, which takes the worry out of safely cleaning your screen. Developed for and used by NASA, Purosol's Screen Cleaner is safe for all forms of electronic displays including LED, OLED, LCP, DLP, and plasma screens used on TV's, computer monitors, laptops, smartphones, tablets, and touchscreens.

All-natural plant extracts removes the most common sources of dirt and grime and reverses the charge that attracts airborne particles to screens, leaving the surface crystal-clear and free of smudges.

Related Questions and Answers

Q: 1. Can I use this lens with my Canon R5?

A: You would need an adapter such as the Urth Manual Lens Mount Adapter for Nikon F / G-Type Lens to Canon RF-Mount Camera Body, BH # URULMAFGR. While autofocus will not be available, you can control the aperture on the adapter itself. https://bhpho.to/3Sxkosa

Q: 2. Does the 400 f2.8 include a lens hood?

A: It includes a one-piece hood. The lens is superb.

Q: 3. What tripod would you recommend with this lens as well as a Gimbal?

A: For use with a gimbal, we'd always recommend slightly taller since when aimed skyward, the working eye-level of your camera is lowered. Too low of a tripod and you'd have to bend forward to use. I'd recommend a series 3 or 4 systematic-style tripod from Robus, Gitzo, Induro, RRS, etc. for use with a gimbal like the Wimberley WH200 https://bhpho.to/3ow9kMh or Gitzo fluid gimbal head (may also be used quite well with spotting scopes) https://bhpho.to/3sfbmmi.

Q: 4. Is a plain glass protection filter available for this lens? I usually put them on my lenses just to keep the front glass clean.

A: No. There are no threads to accept a filter, and even if there were the weight of that much glass would throw off the very good balance of the lens. The front element of the lens is, essentially, plain glass and designed to protect the optical elements and be replaced at reasonable cost if it is damage. It has a coating that repels dust and fingerprints very well. In other words, this lens has a plain glass protection filter built in.

Q: 5. Can I use any other teleconverter with this lens?

A: Yes. You can use any of the Nikon teleconverters.

Q: 6. What about a filter for protection over the front of the lens?

A: David. First off, I absolutely love this lens. It is simply amazing in all aspects. Bit heavy for an old guy but much, much lighter then the old NIkon 400 and the new Nikon 600mm and 800mm. As to the filter. First off there is nothing to screw a traditional Hoya UV filter into. During investigation I read Ken Rockwell's articles on the Nikon 400mm f/2.8 FL VR lens. I recommend you read it. He seems to indicate that the lens comes complete with a built in front protective piece of glass called a meniscus protective glass element This glass is not part of the optical glass elements, but has some ghosting features. Following this info, I had a live chat with on of the B&H technical consultants and questioned them about a UV protective filter and they backed Ken's article. The Nikon hood provided with the lens is very durable but a bit awkward at times. My wife donated a size 6.5 lightweight Vanessa Shoe bag that is perfect to cover the front of the lens when not in use in the field. Its a very effective fast on, fast off dust cover and even has a draw string to tighten onto the lenses when installed. Hope this helps.

Q: 7. This product comes with a 1.25X teleconverter...Is this required to get to 800mm?

A: No it is not. The lens is 800mm without the teleconverter. The AF-S Teleconverter TC800-1.25E ED is also included with the lens to further extend the effective focal length to 1000mm f/7.1 (FX format).

Q: 8. Is this a swiss arca mount?

A: It does not have an arca-swiss compatible foot, you would need a separate plate or a new foot like the http://bhpho.to/2bzAM86

Q: 9. hi, works with the panasonic s1h?

A: Yes, the Metabones Canon FD/FL-Mount Lens to Leica L-Mount T Adapter would be compatible for use with the Panasonic Lumix DC-S1 Mirrorless Digital Camera.

Q: 10. Hey i Will ask you if the Nikon 400mm f2.8 do well on the new Nikon d5 I just have bought. And I have also the Nikon 300mm f4 and it is pretty sharp is the 400mm f2.8 sharper ore do you think it is around the same?

A: The Nikon f2.8 and D5 are an awesome team. The D5 by itself is incredible for low light and all other conditions. Recently used it at night in Disneyland to record the Water/Laser shows. Did a amazing job. I also like the D5 with my Nikon 80-400 lens for flexible shooting.