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OPERATION PRESSURE
150 PSI OR 10.05 BAR (330 FEET OR 100 METERS) |
DIMENSIONS
MARINE HOUSING WITH CARRY HANDLE, GRIPS AND LENS – 32” L x 13.5” H x 12.75” W
MARINE EVF VIEWFINDER WITH SUN HOOD – 13” L x 3.25” H x 7” L |
WEIGHT DRY
50 LBS. MARINE HOUSING
20 LBS. HDF900 WITH LENS AND BP-L90A BATTERY
2 LBS. LEAD BALLAST STRIPS LOCATED ON 2 UNDERSIDES:
8 LBS. MARINE EVF-3” (REPACKAGED HDVF-20A)
82 LBS. TOTAL DISPLACEMENT OD SEA WATER |
NEUTRAL BUOYANCY
IN FRESH WATER WITH O LBS OF LEAD BALLAST
IN SEA WATER WITH 2 LBS OF LEAD BALLAST |
CONSTRUCTION
MARINE GRADE ALUMINIUM ALLOY CASTINGS HARD ANODIZED AND TITANIUM POWDER COATED FOR MAXIMUM CORROSION RESISTANCE. HARDWARE IS MARINE GRADE BRASS AND STAINLESS STEEL |
SEALS
ALL DYNAMIC AND STATIC SEALS HAVE DUAL O-RINGS |
HD ADAPTER FOR CANON LENS
AMPHIBICO’S NEW HD ADAPTER, 'HDA’, ALLOWS HIGH RESOLUTION UNDERWATER PHOTOGRAPHY WITH CANON’S NEW LINE OF HD LENSES. AMPHIBICO’S 'HDA' DELIVERS DISTORTION-FREE WIDE ANGLE IMAGES WHILE MAINTAINING FULL ZOOM CAPABILITY FOR HIGH RESOLUTION ‘CLOSE-UPS’. THE FORMATION OF HIGH QUALITY IMAGES IN BOTH AIR AND WATER PROVIDES THE CONVENIENCE OF DUAL AIR AND UNDERWATER OPERATION. ANGULAR MAGNIFICATION IS NEARLY CONSTANT IN BOTH AIR AND WATER ALLOWING FOR ‘SPLIT IMAGES’ WITH MINIMUM SHEAR ALONG THE AIR-WATER BOUNDARY. |
COMPATIBILITY
2/3 INCH HD FORMAT, (9.59 x 5.39 MM)
HDTV LENSES – (5.5 £ f1 £ 100 MM; MIN f/# 3 2.0) |
OPTICAL FEATURES
ADVANCED OPTICAL FABRICATION TECHNOLOGY, SPECIAL HIGH INDEX GLASSES, PROPRIETARY PLASTIC MATERIALS AND POWERFUL MULTI-CONFIGURATION COMPUTER OPTIMIZATION TECHNIQUES HAVE BEEN USED TO PRODUCE THE NEW HDA LENS. THE LENS PRODUCES SHARP, DISTORTION FREE IMAGES WITH VIVID COLORS. SHARP, VIVID, COLOR IMAGES FREE OF DISTORTION ARE FORMED AT ALL ZOOM SETTINGS AND FOR ALL OBJECT DISTANCES. THE HDA DOME PROVIDES CONSISTANT OPTICAL PERFORMANCE BECAUSE THE PROPRIETARY PLASTIC DOME MATERIAL HAS WATER ABSORPTION £ 0.001%. OTHER PLASTICS SUCH AS ACRYLIC EXHIBIT WATER ABSORPTION OF £ 0.3%. |
DISTORTION FREE
A DEEP CONCAVE DOME OPERATING IN CONJUNCTION WITH INTERNAL HIGH INDEX OPTICS FORMS A FLAT IMAGE AT THE CCD IMAGE SENSOR. DISTORTION IS CORRECTED FOR BOTH NEAR AND DISTANT OBJECTS FRAMED AT ANY ZOOM SETTINGS. |
COLOR CORRECTED
AN ACHROMATIC DOUBLET FABRICATED FROM SPECIAL HIGH INDEX GLASSES PROVIDES EXCELLENT COLOR CORRECTION OVER THE ENTIRE FIELD OF VIEW AT ALL MAGNIFICATION |
USE IN AIR OR WATER
NEARLY CONSTANT ANGULAR MAGNIFICATION IN AIR AND WATER IS ACHIEVED BY USING A HIGHLY CURVED, NON-CONCENTRIC PLASTIC DOME. VARIATION OF ANGULAR MAGNIFICATION IN AIR VERSUS WATER RANGES FROM 5% FOR NEAR OBJECTS AT 5.5 MM fl TO 9% FOR DISTANT OBJECT AT 100 MM fl. ‘SPLIT IMAGES’ WITH AS LITTLE AS 5% SHEAR AT THE AIR-WATER INTERFACE AS POSSIBLE. |
FULL ZOOM CAPABILITY
A ‘FOCUS CORRECTOR GROUP’ COMPENSATES FOR THE WATER-DOME INTERFACE WHICH NATURALLY ACTS AS A NEGATIVE LENS TO LIMIT FOCUSING. OBJECTS AS CLOSE AS 110 MM FROM THE DOME VERTEX (230 MM FROM DOME VERTEX IN WATER) CAN BE BROUGHT INTO CLEAR FOCUS AT FULL ZOOM, 100 MM fl. |
HIGH RESOLUTION
HIGH POLYCHROMATIC MTF COMPATIBLE WITH HDTV REQUIREMENTS IS MAINTAINED OVER THE ENTIRE FIELD BY SUPPRESSING THE ASTIGMATISM USUALLY FOUND IN LESS SOPHISTICATED WIDE ANGLE LENSES. |
DURABLE OPTICAL COATINGS
ALL OPTICAL SURFACES ARE HIGH EFFICIENCY BOARD BAND ANTI-REFLECTION (HEBBAR) COATED. THE EXTERNAL PLASTIC DOME SURFACE HAS A PROPRIETARY, SEAWATER RESISTANT, HEBBAR HARD COATING WHICH REDUCES SCRATCHES AND ALLOWS AGGRESSIVE CLEANING TO REMOVE SEAWATER RESIDUES. |
