Canon AL-1
From Wikipedia, the free encyclopedia
The Canon AL-1 with QuickFocus (QF) was an FD mount, 35mm single-lens reflex camera introduced in March 1982. It was aimed at those who had trouble focusing through the viewfinder—either novices, or those with poor eyesight—and was intended to head off the competition from the first full-autofocus cameras from other manufacturers, such as the Pentax ME-F.
The QF focus-assist system searches for the greatest image contrast in the subject using three linear CCD arrays. When the contrast in the image is greatest, the image is the least blurred and thus in focus. Below the viewfinder image, two red arrows indicated which direction to turn the focusing ring to achieve focus, which is indicated by a green circle lighting in between the two arrows. Contrast detection is the system used for autofocus on most compact digital cameras in recent years.
The exposure is controlled by a TTL silicon photocell and aperture-priority AE with centerweighted averaging metering. All shutter speeds are electronically controlled and stepless. The camera is compatible with all FD lenses.
While not a true autofocus system, this camera marked Canon's entry into the field of auto-focusing SLRs. The concept didn't take over the market in 1982, but in 1985, Minolta introduced the Maxxum 7000 (Dynax 7000 in Europe and Asia), the first body-integrated autofocus SLR. Canon reacted to this with the T80, the company's first true autofocus SLR, but within two years the autofocus revolution prompted Canon to start afresh with the EOS system, abandoning compatibility with older cameras.
[edit] External links
| Canon SLR cameras | ||
| Mount Type | Series | Model |
|---|---|---|
| FL | FX (1964), FP (1964), Pellix (1965), FT QL (1966), Pellix QL (1966), TL (1968) | |
| FD | FTb (1971), EF (1973), TLb (1974), TX (1975) | |
| F | F-1(1971), F-1n (1976), New F-1 (1982) | |
| A | AV-1 (1979), AT-1 (1978), A-1 (1978), AL-1 (1982), AE-1 (1976), AE-1 Program (1981) | |
| T | T50 (1983), T60 (1990), T70 (1984), T80 (1985), T90 (1986) | |
| EOS | 1 | EOS-1 (1989), EOS-1N (1994), EOS-1N RS (1995), EOS-1V (2001), |
|
EOS 650 (1987), EOS 620 (1987), EOS 750QD (1988), EOS 850QD (1988), EOS 630QD (1989), EOS RT (1989), EOS 700QD (1989), EOS 10sQD (1990), EOS 1000F (1990), EOS 100 (1991), EOS EF-M (1991), EOS 5/5QD/A2/A2e (1992), EOS 1000FN (1992), EOS 500 (1993), EOS 888 (1993), EOS 50 (1995), EOS 500N (1996), EOS 3 (1998), EOS 88 (1999), EOS 300 (1999), EOS 30 (2000), EOS 3000N (2002), EOS 300V (2002), EOS 3000V (2003), EOS 30V (2004), EOS 300X (2004) |
||
| Canon DSLR cameras | ||
| Edit | ||
