The 39mm UV/IR Cut Hot Mirror Lens Filter from Kolari Vision is designed to normalize your camera when it has either a full spectrum or two-spectrum modification. In either case, it allows light to pass normally to the sensor, so you can shoot normal photos. The filter is designed with coated glass optics and an aluminum filter ring threaded on both sides. (The optional pro version has a knurled brass ring.)

The filter can only be used with a modified camera. A spectrum-modified camera is one in which the camera's native low-pass filter was removed in order to support certain IR filters for IR photography. If you have such a camera, this hot mirror filter will let you take normal photos without having to make any changes to the spectrum modification. The filter blocks IR light and some UV light, the same way the native low-pass filter that was removed from the camera during modification would have. The filter requires no exposure compensation.

Normalizes Spectrum Modified Cameras    Works with Full and Two-Spectrum Cameras    Functions Like Native Low-Pass Filter    Coated Glass Optics with Aluminum Ring    Dual-Side Threading

Related Questions and Answers

Q: 1. Would it be possible to adapt a 67-mm ND filter to the rear 35-mm filter thread? How might this affect the image for Canon APS-C?

A: No, not at all.

Q: 2. 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: 3. Does this lens have any noticeable chromatic aberration?

A: Yes Opteka 500mm f/6.3 Mirror Lens for T Mount does have noticeable chromatic aberration in an area of high contrast where a bright light meets a dark shadow.

Q: 4. Will it fit a canon AE-1 35mm film camera?

A: Opteka 500mm f/6.3 Mirror Lens for T Mount is compatible with the Canon AE1 but you also need to get this FD to T mount adapter. https://www.bhphotovideo.com/c/product/116734-REG/General_Brand_ATC_T_Mount_SLR_Camera_Adapter.html

Q: 5. Is there a T mount adapter for this Opteka mirror lens that will fit an L mount FF camera?

A: Yes, there are T-mount adapters to adapt the Opteka 500mm f/6.3 Mirror Lens for T Mount to the L-mount. Currently we have the Leica T2 Digiscoping Adapter, BH #LEDAT2T (https://bhpho.to/3P0XHuW).

Q: 6. What is the diameter of the central obstruction?

A: 43mm.

Q: 7. Do you carry the adaptor that can be used for sony a6300?

A: We have a Vello adapter for the T mount. https://bhpho.to/2wcsnBI

Q: 8. Does this lens have any noticeable comatic aberration?

A: We have not heard of any noticeable chromatic aberration with this lens to date.

Q: 9. Will this work with a Canon EOS T100 with the T-mount adapter for EF/EF-S mounts? I notice it's pretty large and I'm wondering if the flash protrusion which sticks out about 9/16 of an inch on the T100 would interfere with this fitting correctly.

A: Yes it will fit the T100. It is manual focus only and your camera will only work in manual or aperture priority exposure modes.

Q: 10. Good night: Will this Opteka 500mm f6.3 95mm mirror lens fit my Sony A390? I need T2 thread for Sony @390 DSLR camera (A390).

A: To use the Opteka 500mm f/6.3 Mirror Lens for T Mount on the Sony Alpha A390 Digital SLR Camera, you need the Vello T Mount Lens to Sony A-Mount Camera Adapter. Here is the link: https://bhpho.to/3lUBHao.