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| Leica/Leitz SBOOI 5cm |
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| This is the 5cm bright line finder code name - SBOOI, usually mounted on the accessory shoe of the technical and scientific models such as the Ic, If and Ig. However, it was very popular for sport photography by attaching on a regular model! |
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| Notice the different from different period - one with groove lines on both sides, whereas, the other is smooth on both sides! |