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SUPER! - ULTRA FAST COMPACT SHARP - VERY LARGE FORMAT - SHARP COMPACT WIDE ANGLE LENS.
BETTER THAN KODAK AERO EKTAR.
EX++++ BUHL Optical USA/ factory unmarked/ 180mm 
 SHARP F2 ULTRAFAST 7-element HD WIDE ANGLE PROJECTION LENS.


FACTORY NON-MARKED, MEASURED by THE SELLER, SOLD AS DESCRIBED.
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WHITE GLASS TINT HINTS for FUSED SILICA TYPE OF GLASS.
PERFECT for CROPPED MEDIUM FORMAT BACKS & HASSELBLAD, FUJI GFX 100 CAMERAS.
CAN BE ADAPTED to CAMERAS, 5"x7" COVERS INFINITY++ MOVEMENTS,
 May be GOOD for INDOORS up to 8X10" flat.
ACTUALLY, IT MAY COVER 8X10 INFINITY FLAT, BUT I CANNOT CONFIRM IT.
CLEAN, CLEAR GLASS HAS NO SCRATCHES, NO FUNGUS, NO DUST.

INCLUDING HELICAL FOCUS MOUNTING TUBE WITH 110 mm X 110 mm MOUNT PLATE.
IT MAY BE BOLTED OVER TO MANY LENSBOARDS.

NOW a LOT of LENS-BOARD MAKERS on EBAY FROM USA, ITALY, CHINA -
IT is POSSIBLE TO ORDER a not expensive LENS-BOARD 
FOR ANY 4X5", 5X7", 8X10" VIEW CAMERA,
CUSTOM MADE for DOUBLE DIAMETER FOR EASY FIT

REAR BARREL FITTING DIAMETER D87//88mm. REAR ELEMENT D75mm, FRONT D84mm. 

CALCULATED 180mm :84mm = f 2.142857  - roundly F2.

METTERED THROUGH THE LENS ACTUAL FN# COULD BE A LITTLE DIFFERENT from GEOMETRICAL VALUE CALCULATION.

VERY COMPACT - 100mm LONG.  W 2Lb12oz.
BETTER when SONY F=225 PROJECTION LENS.
I have a lot of BUHL Optical USA /factory non-marked/ lenses; they're just amazing!

/Look at my listing/ -
Sharp F2 FAST 180mm UHD PPROJECTOR LARGE MEDIUM+4X5"5x7"LENS Camera TEST PERFECT