Hobbies And Interests
Lenses
Lenses for the Petri Racer include the Petri 2.8/45 and 1.8/45. The ̶0;2.8̶1; and ̶0;1.8̶1; designations refer to the maximum aperture or ̶0;F stop̶1; for these 45 mm lenses. The lenses accept 55 mm filters. The lens hood contains a black-coated light alloy metal that minimizes light reflections that can detract from the image. The minimum focusing distance is 2.75 feet. The Petri auxiliary lens set contains a telephoto lens and a wide-angle lens plus a viewfinder.
The ̶0;Green-O-Matic̶1; System
The Petri Racer̵7;s ̶0;Green-O-Matic̶1; system features a bright, framed viewfinder that outlines what the lens records. As you peer through the viewfinder, a split-image rangefinder spot appears. The adjustable, metal focusing knob is connected to the side of the lens barrel. Moving the focusing knob up and down will line up the split image as one clear image.
The ̶0;Diamatic Eye̶1;
The Petri Racer contains a CdS light meter known as the ̶0;Diamatic Eye.̶1; The CdS cell is located at the top of the lens near the interior of the lens hood. This exposure meter requires a mercury battery inserted in the underside of the camera body. Cocking the film advance lever activates the light meter. The top of the camera includes metering labels, such as ̶0;Against the Light̶1; and ̶0;Normal,̶1; plus a red indicator light. The viewfinder displays the match-needle meter that responds to adjustments with the aperture ring or speed settings. Centering the needle in the middle of the scale usually indicates a well-exposed image. Tripping the shutter on the camera̵7;s front will shut off the meter.
Flash System
The Petri Racer has a flash accessory shoe for accessory flash units. This model accepts both electronic flash guns and flash bulbs. The side of the lens contains a synchronizing flash socket. The manual̵7;s synchronization chart indicates electronic synchronization at 1/30 second or slower for M Class flash bulbs. Electronic flash can be used at all shutter speeds.