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" VIEW CAMERA,
CUSTOMLY MADE for DOUBLE DIAMETER FOR EASY FIT.
CREATIVITY BOOSTER. NOT a FISH-EYE, DISTORTION-FREE FLAT FIELD.
30mm ULTRA WIDE SHORT THROW FLAT FILD WIDE PROJECTION LENS DIY ASSEMBLY PARTS.
FIT FOR 4X5" & 5X7" VIEW CAMERAS WITH DIGITAL OR FILM BACKS
YOU WILL NOT BUY 30mm LENS FOR 69 or 612 FORMATS ANYWHERE AT ALL/ FOR ANY MONEY/.
WILL BE GOOD FOR 612 + 69 + 67 + 66 -645 FORMATS & MEDIUM FORMAT DIGITAL BACKS.
FRONT & REAR ELEMENTS by BUHL OPTICAL.
LITTLE or NO DISTORTIONS.
100mm FOCAL INFINITY PLANE,
LENS for INDOORS USE AS A SHORT THROW DESIGN /NO IFINITY/.
APPROXIMATE PARAMETERS /MAGE PROJECTION is a way under 50 mm /as ULTRA WIDE 30mm.
NO IRIS, BARREL TYPE.
FRONT LENSBLOCK VG+, REAR EX+ CONDITION.
FRONT ELEMENT D60mm, REAR D47mm.
F# CALLCULATION: 100mm:60mm =1.666 roundly F1.7
f# calculation 30mm:60mm= f0.5
ACTUAL F# NOT MEASURED.
W1LB15oz.