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2. AN/PVS-4 - Wikipedia

   en.wikipedia.org/wiki/AN/PVS-4

   A small surveillance scope intended primarily for Law Enforcement use, that is designed specifically to use surplus MX9644 tubes from AN/PVS-4s that are upgraded to Gen III tubes. ITT's F4960 Stinger night sight

3. Pinhole (optics) - Wikipedia

   en.wikipedia.org/wiki/Pinhole_(optics)

   In optics, pinholes with diameter between a few micrometers and a hundred micrometers are used as apertures in optical systems. Pinholes are commonly used to spatially filter a beam (such as a laser beam), where the small pinhole acts as a low-pass filter for spatial frequencies in the image plane of the beam. [1] [2]

4. Breakthrough Starshot - Wikipedia

   en.wikipedia.org/wiki/Breakthrough_Starshot

   StarChip is the name used by Breakthrough Initiatives for a very small, centimeter-sized, gram-scale, interstellar spacecraft envisioned for the Breakthrough Starshot program, [1] [36] a proposed mission to propel a fleet of a thousand StarChips on a journey to Alpha Centauri, the nearest star system, about 4.37 light-years from Earth.

5. List of large sensor fixed-lens cameras - Wikipedia

   en.wikipedia.org/wiki/List_of_large_sensor_fixed...

   Fujifilm FinePix X100. This is a list of large sensor fixed-lens cameras, also known as premium compact cameras or high-end point-and-shoot cameras.These are digital cameras with a non-interchangeable lens and a 1.0‑type (“1‑inch”) image sensor or larger, excluding smartphones and camcorders.

6. Zoom lens - Wikipedia

   en.wikipedia.org/wiki/Zoom_lens

   A simple zoom lens system. The three lenses of the afocal system are L 1, L 2, L 3 (from left). L 1 and L 2 can move to the left and right, changing the overall focal length of the system (see image below). There are many possible designs for zoom lenses, the most complex ones having upwards of thirty individual lens elements and multiple ...

7. Pinhole camera - Wikipedia

   en.wikipedia.org/wiki/Pinhole_camera

   The f-number of the camera may be calculated by dividing the distance from the pinhole to the imaging plane (the focal length) by the diameter of the pinhole. For example, a camera with a 0.5 mm diameter pinhole, and a 50 mm focal length would have an f-number of 50/0.5, or 100 (f/100 in conventional notation).