Some doubted the discovery at first, arguing that the appearance of the structure was merely an optical illusion created by the observation technique used by Golgi.

Some multi-track recordings were made on optical sound film, which led to new advances used primarily by MGM ( as early as 1937 ) and Twentieth Century Fox ( as early as 1941 ).

Some earlier optical keyboards were limited in their structure and required special casing to block external light, no multi-key functionality was supported and the design was very limited to a thick rectangular case.

Some cameras make use of multiple lenses and rainbow-colored flashes, or exhibit extreme optical distortions and even light leaks.

Some lasers do not use an optical cavity, but instead rely on very high optical gain to produce significant amplified spontaneous emission ( ASE ) without needing feedback of the light back into the gain medium.

Some of these instruments produce a virtual image when applied to the human eye ; others produce a real image which can be captured on photographic film or an optical sensor, or can be viewed on a screen.

Some advanced face and eye powders contain optical brightener microspheres that brighten shadowed or dark areas of the skin, such as " tired eyes ".

Some quasars display changes in luminosity which are rapid in the optical range and even more rapid in the X-rays.

Some effects involved a combination of techniques ; a ray gun might require a pyrotechnic during filming, and then an optical glowing line added to the film image in post-production.

Some optical power is lost into clad due to these modes.

Some modern optical power meters have the capability to set to zero the reference level measured at the output of the reference fiber, so that the transmission loss of the fiber under test may be read out directly.

Some phenomena are yet to be conclusively explained and may possibly be some form of optical phenomena.

Some studios sought to compensate for this by shooting their color pictures with a full aperture gate ( rather than the Academy aperture ), and then reducing the image in Technicolor's optical printer ( a predecessor of that which would be today's Super-35 1. 85: 1 format ).

Some minerals exhibit unusual optical phenomena, such as asterism ( the display of a star-shaped luminous area ) or chatoyancy ( the display of luminous bands, which appear to move as the specimen is rotated ).

Some plastics also have more advantageous optical properties than glass, such as better transmission of visible light and greater absorption of ultraviolet light.

Some games, however, have mounted optical guns, such as Exidy's Crossbow.

Some cystoscopes use optical fibres ( flexible glass fibres ) that carry an image from the tip of the instrument to a viewing piece at the other end.

Some of the knots do exhibit well-developed tails which are often detectable in optical thickness from the visual spectrum.

Some superconducting magnets have a small sample chamber, far too small to contain the entire optical system.

Some high performance objective lenses may require matched eyepieces to deliver the best optical performance.

Some important properties of laser diodes are determined by the geometry of the optical cavity.

Some of his particular achievements include measurements of variable stars, using photography, and the improvement of optical systems, through the perturbative investigation of geometrical aberrations.

Some software add-ons provide operability with specific hardware, such as game controllers and optical motion sensors.

Some modern instruments are built with keyboards which can be shifted sideways, allowing the player to align the mechanism with strings at either a = 415 Hz or a = 440 Hz.

Some keyboards are designed out of flexible materials that can roll up in a moderately tight bundle.

Some free-reed instrument keyboards such as accordions and Indian harmoniums include microtones.

Some keyboards, such as the Kinesis, retain the QWERTY layout but arrange the keys in vertical columns, to reduce unnecessary lateral finger motion.

Some feature additions include multiple window support, multiple input device support ( many mice, many keyboards, etc.

Some European copies of the album also credit Donny Rose on keyboards ( the song, " Shut Down ," was recorded live in the studio, and features a melodic, two-fisted piano ).

Some instruments that have strings have attached keyboards that the player uses instead of directly manipulating the strings.

Some digital keyboards can produce an electronic vibrato effect, either by pressure on the keys, or by using a joystick or other MIDI controller.

Some instrument-makers sought to remedy the problem by introducing more than twelve notes per octave, producing enharmonic keyboards which could provide, for example, a D and an E with different pitches so that the thirds B – D and E – G could both be euphonious.

Some non-English language keyboards have special keys to produce accented modifications of the standard letter keys.

Some keyboards also have a Compose key for typing accented and other special characters.

Some power trios also experimented with keyboards and sequencers in the studio, most notably the Canadian trio Rush, whose bassist-frontman Geddy Lee has often demonstrated his multi-instrumental capabilities on diverse rock albums such as 1977's A Farewell to Kings and 1985's Power Windows.

Some power trios add to the fullness of their sound by using bass pedalboards, which are keyboards played by the feet.

Winwood performed two songs, " Gimme Some Lovin '" and " Higher Love ", and provided backing vocals, organ and keyboards for the other artists.

Some users of keyboards with caps lock on the left remap the keys to exchange Control and caps lock, finding the traditional location more ergonomic for using programs benefiting from use of the Control key.

Some notable current and retired jazz musicians in Hawaii include Gabe Baltazar ( saxophone ), Henry Allen ( guitar ), Adam Baron ( drums ), Vic Castellini ( Drums ), David Choy ( saxophone ), Rich Crandall ( piano ), Dan Del Negro ( keyboards ), Pierre Grill ( piano / keyboards / trombone ), Bruce Hamada ( bass ), DeShannon Higa ( trumpet ), Jim Howard ( piano ), Steve Jones ( bass ), John Kolivas ( bass ), Ryan Kunimura ( saxophone ), Noel Okimoto ( drums / percussion / vibes ), Michael Paulo ( reeds ), Rene Paulo ( acoustic grand piano ) was a forerunner of recording Hawaiian music in the jazz venue in the early 1960s and is one of Hawaii's legendary music greats, Robert Shinoda ( guitar ), Arex Ikehara ( bass ), Phil Bennett ( drums ), Aron Nelson ( piano ), Tennyson Stephens ( piano ), Dean Taba ( bass ), Betty Loo Taylor ( piano ), Tim Tsukiyama ( saxophone ) and Abe Lagrimas Jr. ( drums / ukulele / vibes ).

Some of the NES Miracle keyboards were also later converted for PC use-the Nintendo Seal of Quality on these boards was covered up with a piece of plastic.

Some keyboards have a teaching feature that will indicate the notes to be played on the display and wait for the player to press the right one.

Some calculators have QWERTY keyboards and others can be attached to an external keyboard which can be close to the size of a regular 102-key computer keyboard.

Some IBM compatible keyboards, e. g., the Northgate OmniKey ™/ 102, also featured function keys on the left, which on examples with swapped left Alt and Caps Lock keys, facilitate fingers of a single hand simultaneously striking modifier key ( s ) and function keys swiftly and comfortably by touch even by those with small hands.

Some younger band leaders have also added congas, timbales ( played by the tamborero ), and keyboards to their groups in an attempt to close the gap between típico and orquesta and increase their listening audience.

Some were even built with pedal keyboards, which required the use of an assistant to run the bellows or, for some of the later models, an electrical pump.