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2. Ring flash - Wikipedia

   en.wikipedia.org/wiki/Ring_flash

   An LED-based ring flash. A ring flash is a circular light that is often operated with a camera lens in the center to take photographs. Unlike point light sources, a ring flash can illuminate a subject with minimal shadows by closely and evenly surrounding the optical axis of the camera lens.

3. USB microscope - Wikipedia

   en.wikipedia.org/wiki/USB_microscope

   A miniature USB microscope with inbuilt LED lights next to the lens at left. Sea salt crystals seen with a USB microscope. Table salt crystals seen with a USB microscope. The top side of a sage leaf seen with a USB microscope - trichomes are visible. The USB image of the underside of a sage leaf - more trichomes are visible on this side.

4. Bright-field microscopy - Wikipedia

   en.wikipedia.org/wiki/Bright-field_microscopy

   The light path of a bright-field microscope is extremely simple; no additional components are required beyond the normal light-microscope setup. The light path begins at the illuminator or the light source on the base of the microscope. Often a halogen lamp is used. The light travels through the objective lens into the ocular lens, through ...

5. Lattice light-sheet microscopy - Wikipedia

   en.wikipedia.org/wiki/Lattice_light-sheet_microscopy

   Lattice light sheet microscopy can be viewed as an improvement of Bessel beam light sheet microscopes [8] in terms of axial resolution (also termed resolution in z). In Bessel beam light sheet microscopes, a non-diffracting Bessel beam is first created then dithered in the x direction to produce a sheet.

6. Digital Photography Review - Wikipedia

   en.wikipedia.org/wiki/Digital_Photography_Review

   Digital Photography Review, also known as DPReview, is a website about digital cameras and digital photography, established in November 1998. [4] The website provides comprehensive reviews of digital cameras, [ 4 ] lenses and accessories, buying guides, [ 4 ] user reviews, [ 4 ] and forums for individual cameras, as well as general photography ...

7. Flash (photography) - Wikipedia

   en.wikipedia.org/wiki/Flash_(photography)

   Slower shutter speeds (typically from 1 ⁄ 10 to 1 ⁄ 50 of a second) were initially used on cameras to ensure proper synchronization and to make use of all the bulb's light output. Cameras with flash sync triggered the flashbulb a fraction of a second before opening the shutter to allow it to reach full brightness, allowing faster shutter ...

8. Phase-contrast microscopy - Wikipedia

   en.wikipedia.org/wiki/Phase-contrast_microscopy

   In its positive form, the background light is instead phase-shifted by +90°. The background light will thus be 180° out of phase relative to the scattered light. The scattered light will then be subtracted from the background light to form an image with a darker foreground and a lighter background, as shown in the first figure. [5] [6] [7]

9. Digital microscope - Wikipedia

   en.wikipedia.org/wiki/Digital_microscope

   A digital microscope is a variation of a traditional optical microscope that uses optics and a digital camera to output an image to a monitor, sometimes by means of software running on a computer. A digital microscope often has its own in-built LED light source, and differs from an optical microscope in that there is no provision to observe the ...