Rifle Scope 2.5-10x40 with laser red dot
Some rare numbers on the body of the alignment mirror are the parameters of the alignment mirror, such as 3-9x40, which means that this is a zoom alignment mirror with a minimum of 3 times and a maximum of 9 times and a lens aperture of 40mm.
Filter (Optical Filters) is a kind of targeted selection of spectral wavelength through, reflection, cut-off, attenuation of optical components.
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