Zoom strobe device

Details Zoom strobe device Zoom strobe device

1996-07-25

1998-03-10

Lee, Eddie C.

Photography

Flash system responsive to focal length or distance

Illumination angle responds to focal length or distance

396175, G03B 1503

Patent

active

057272352

ABSTRACT:
An improved zoom strobe device is provided. When a zoom lens changes its focal length from a first length to a second length, the zoom strobe device changes its illumination angle from its minimum angle to maximum angle when the focal length of the zoom lens is changed from the first length to a third length which is smaller than the second length but greater than the first length, and then the strobe device maintains the maximum illumination angle when the focal length of the zoom lens changes between the third length and the second length.

REFERENCES:
patent: 4914461 (1990-04-01), Hori
patent: 4916475 (1990-04-01), Hori
patent: 4944030 (1990-07-01), Haraguchi et al.
patent: 4951074 (1990-08-01), Ueda
patent: 5280315 (1994-01-01), Nomura et al.

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