The 58mm Mirror Filter from Kase features an opaque, nonreflective black circle sandwiched between two sheets of B270 optical glass to create an unusual effect filter. The black circle does not read in the image but combines a slight, soft defocus effect paired with halo-shaped highlights from light points in the image area. The halo shape's effect varies with the aperture, allowing the impressionistic effect to be adjusted.

The placement of the opaque black circle may cause some autofocus systems to not fully function, but by recomposing the shot and holding the focus point, the shot may still be taken. The circle is fully protected by glass on both sides and will not scratch off or otherwise wear away.

Rear-Threaded Soft Defocus Filter    Creates Halo Bokeh Effect    Multicoated B270 Optical Glass

Related Questions and Answers

Q: 1. Is the T-mount included? Is there a hood that will fit?

A: T mount not included, but its inexpensive. And you can get the proper one for your camera.No hood that I know of...

Q: 2. Will this lens work with my M50?

A: Yes. You need the M T mount. It is a manual lens.

Q: 3. Is it work with celestron nexstar 8se? Is it necessary to buy any additional adapter?

A: No it will only attach toa 2"thread which the 8SE does not have.

Q: 4. The Diagonal (2") has 2"-18 threads; will it fit the rear cell of the Celestron 8" evolution OTA which has a thread spec of 2"-24?

A: Yes, the Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes will fit the rear threads of the Celestron NexStar Evolution 8 203mm f/10 Schmidt-Cassegrain GoTo Telescope.

Q: 5. Will I need an adaptor to use this lens with my Nikon D3500?

A: Yes you would just need a T-Mount to F-Mount adapter.

Q: 6. Does this lens produce a ring/donut bokeh?

A: Yes

Q: 7. does it give same performance if I use 1.25 eyepiece. or if I use 1.25 diagonal with 1.25 eyepiece. which one has better performance?

A: This is an upgraded Diagonal compared to the Diagonal shipped as standard equipment with Celestron Telescopes and will give improved performance with both 1.25 and 2 inch eyepieces. This diagonal should provide improved performance over most 1.25 Diagonals and will be more versatile.

Q: 8. will this lens work with and Olympus OM or a Pentax K1000? If an adapter is required, will two different ones be needed or just one?

A: You would need T-mount to any camera adapter (T-mount to Olympus OM , T-mount to Pentax K )

Q: 9. Will this lense work with nikon d3400

A: You will need a T mount adapter ($10) and set the camera to manual. The lens is totally manual with a fixed f stop.

Q: 10. What is the difference between this and the Bower 500 mm f/6.3 mirror lens that costs $199? They look like they come from the same factory.

A: The Opteka 500mm f/6.3 Mirror Lens for T Mount and the Bower 500mm f/6.3 Manual Focus Telephoto T-Mount Lens are very similar in design. There are a couple differences. The Opteka is currently made in China, whereas the Bower is currently made in South Korea. The Opteka comes with a Limited 10-Year Warranty, whereas the Bower comes with a Limited 1-Year Warranty