Welcome to Zen-Ray Optics.

NEPTUNE ™ is Our Answer to High Quality Astronomy Optics

The NEPTUNET series extend Zen-Ray's expertise in the high quality waterproof binoculars. They are heavy-duty rated giant binoculars. We understand the need of backyard astronomers, who crave for nothing but high quality optics to spend a mesmerizing night gazing through the galaxy we reside in and beyond. From start to finish, we meticulously manufacture and inspect every piece of equipment to our highest quality standard. Protected by attractive rubber armoring, CNC-machined all metal construction is guaranteed to last for many years to come. The optical quality never fail to impress everyone who has the privilege to experience it (or own it). What a truly excellent instruments it is for astronomical and wildlife observation!
Featured with fully broadband multi-coated optics and BAK4 prisms, NEPTUNE presents a bright, sharp, closer universe to you. Smooth, CNC-machined individual focusers provide the precision focusing essential for maximum performance on astronomical targets. Collimation can be adjusted by experienced users, if necessary. Each binocular is covered by our two-year warranty and 30-day return policy.

As a proud owner of NEPTUNET Waterproof binocular, you will receive a deluxe heavy-duty carrying case with durable PVC armoring and aluminum trim. The cases are lined with soft, "egg-crate"-style foam for maximum protection.

Neptune 25x100 at Rose City Astronomer Star Party, September 2007

MARINER Series
SEAVUE Series
ZRS (ZEN-RAY SUMMIT) Series
VISTA Series
NEPTUNE Series

MODEL	NEPTUNE 20X80 CF (Triplet, Waterproof)	NEPTUNE 20x90 IF (Waterproof)	NEPTUNE 25X100 IF (Waterproof)
OBJECTIVE LENSES	80mm f/4.1; 3 Elements, 2 Groups	90mm f/4.1; 2 Elements, 2 Groups	100mm f/4.5; 2 Elements, 2 Groups
EYEPIECES	4 Elements, 3 Groups	4 Elements, 3 Groups	4 Elements, 3 Groups
MAGNIFICATION	20x	20x	25x
EYE RELIEF	15mm useable (18mm total)	15mm useable (18mm total)	15mm useable (18mm total)
EXIT PUPIL	4.0mm	4.5mm	4.0mm
APPARENT FIELD OF VIEW	58 º	58 º	60 º
TRUE FIELD OF VIEW	3.2 º (167 ft./1000 yds.)	3.2 º (167 ft./1000 yds.)	2.5 º (131 ft./1000 yds.)
WEIGHT	7 lbs., 3 oz.	8 lbs., 7 oz.	10 lbs., 2 oz.
CLOSE FOCUS	25m	25m	35m
IPD RANGE	60.5-74mm	60.5-74mm	61-73mm
COATINGS	Fully Broadband Multi- Coated	Fully Broadband Multi- Coated	Fully Broadband Multi- Coated
LIGHT TRANSMISSION	99.0%-99.7% per surface; >85% total	99.0%-99.7% per surface; >85% total	99.0%-99.7% per surface; >85% total
WARRANTY	2-year limited warranty	2-year limited warranty	2-year limited warranty

Where to buy?

FBMC: Fully Broadband Multi-Coated