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Optolong's UV-IR cut filter is designed to block ultraviolet and infrared wavelengths to improve sharpness of the image as most of the optics are designed for the visible spectrum
because it's very difficult to create a lens with the same focal point for the visible and IR spectrum.
It is used on a digital camera and the video, which do not have an IR protection filter toward an image sensor or were remodeled. This is important because unfiltered CCD and CMOS sensors are extremely susceptible to UV and IR rays just outside the visible spectrum that can have a very negative impact on image quality.
Dom
2025-09-04 10:15:02
This cut filter seems to work very well
Michael Hardy
2025-07-28 15:51:30
Cheap glass isn't worth using. I respect the brand. Minimal fringing.
Randy
2025-06-20 11:41:13
Great filter and price. Amazon shipping is a plus.
D. Cherry
2025-05-27 19:57:44
This is a good filter for shooting galaxies and clusters in moderately light polluted skies. Works as described.
James T.
2025-04-17 14:10:02
This filter works just fine. My only issue is OptLong has a huge QC control issue. Like that box of chocolate you never know what you'll get inside. With Optlong that is a truth.
Mohamad Abou Elainain
2025-01-25 09:04:20
Got scratched with a fiber cloth and became un usable!!! It was still brand new
Gary T.
2025-01-07 15:18:10
Bought this to help reduce the halo and sloppy looking of the stars in my star photos. So far so good. Have only done a couple of shots, but it looks promising.
Zuukz
2024-11-28 18:51:16
Optolong rules, I've got the L Pro and L eXtreme. They do what they are supposed to do.
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