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Brass mounted Apalantic landscape lens

circa 1880

Aplanat or Simple Landscape Lens.

circa 1890
Lens barrel with iris diaphragm calibrated 1-5. Four elements 15/25/35/45 in five normal, five wide angled and four landscape combination. Emil Busch.

Busch Combination Lens Aplanat Series I

Busch's portrait aplanat No.2 lens F.8 with 7 inch f.l. with a ring type iris diaphragm. c.1910.

Busch's portrait aplanat No.2 lens

circa 1910
Busch Wideangle Aplanat lens No 4. Series C f16 10in. Rotating aperture plate with f16,22, 32,45,64,88.

Busch Wideangle Aplanat Lens No 4