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The first SLR 680 model model was introduced in 1982. It uses 600 integral film, has a sonar and an intergated electronic flash. The top of the line so-to-say. The original retail price was $265, only slightly more the the SX Sonar from 1978. There was a second version (SE) with minor changings to the trim. In 1996 an new version was released, the SLR 690. In this model analog metering/timing circuitry had been replaced by a 4-bit microcontroller. It was very expensive in the beginning (just under $ 400). Prices dropped as it became quite popular. By 2000 it disappeared from the markets except Japan.

As it's the top of the line camera and a real SLR, prices are still very high. The Sonar and the flash might be handy, but add to the size of the camera. In my opinion the 680/690 cameras are more fragile than the ordinary SX cameras. 3 of the 4 I bought were defective and had to be sent back to the seller. As they were reknown sellers, this wasn't a problem, but be cautious before you invest quite a sum. I prefer the so-called SX 670, a SX70 modified to use 600 film.

Features of the SLR 680 model:
    4-element 116mm f/8 glass lens
    Minimum focus: 10.4 inches
    Autofocus; uses Polaroid Sonar AF system.
    AF "preview" available before exposure is made.
    Full manual focus is also possible.
    Low-light warning in viewfinder.
    Electronic shutter
    Programmed automatic exposure, shutter speeds from >10 sec to 1/175; aperture range f/8- f/22.
    Socket for an electrically-actuated remote shutter release.
    SLR (Single-Lens Reflex) viewing.
    Uses 600 film.
    Has built-in automatic electronic flash.
    Flash reflector automatically tilts depending on focus distance
    Black plastic body with faux leather covering.

Some photos:

The Polaroid SLR 680.

Camera front with its Sonar and its built-in electronic flash. The little switch next to the sonar disconnects the Sonar system.

Camera unfolded.

Camera folded. Flash off switch and flash control lamp. As usual, the Porvair covering begins to deteriorate.

Closed, seen from below. Tripod socket.