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Coatings

Treatments applied to the surfaces of lens elements to reduce flaws in an image

Coatings on a lens reduce reflections from the lens surface and therefore increase light transmission. Coatings also help to eliminate wayward light reflecting inside the lens—which causes flaws such as flare and ghosting—thus increasing image brilliance and contrast.

While all internal lens elements may be coated, the coating of the front lens element is most critical to the performance of the lens assembly as a whole. Coatings were initially applied as single layers (single coating) and later as multiple layers (multi-coating).

The colours of reflections seen in this front element indicate what kind of coating it has:

No coating:
bright white reflections from the glass

Single coating:
bright reflections of blue and amber

Multicoating:
reflections of many colors, especially green and purple

  • Rangefinder Cameras
  • Focal Plane
  • Focal Length & Aperture
  • f-stop
  • Numbers on a lens
  • Prime lens
  • Fast lens
  • Angle-of-view (AOV)
  • Elements & Groups
  • Coatings
  • Leaf shutters
  • Shutter speed
  • Film speed ASA/ISO
  • EV / Exposure Value
  • LV / Light Value
  • LV Tables
  • Priority
  • Depth-of-field
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  • Be meter free
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  • Double & half
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  • Rangefinder Vs. SLR
  • Filters
  • Filters: UV
  • Filters: Skylight
  • Filters: Polarizing
  • Filters: ND
  • Filters: Black & White
  • Diffraction
  • Multiple Exposures
  • Sharpest Aperture
  • C-41 B&W
  • Zone focusing
  • Half-frame
  • Vignetting
  • Guide Number
  • X & M
About Ilott Vintage

A valuable reference for anyone wanting to learn more about rangefinder cameras, manual film photography, or both, this website is intended to serve not only as a resource to discover some amazing objects but also as a place to learn more about them, to understand exactly what they are capable of, and why. Read More

See Also
  • Minolta AL
  • Original Canonet vintage rangefinder
    Canonet The original standard setter
  • Minolta V2 The world's first 1/2000 leaf shutter camera
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    Wednesday 22nd March 2023