Žiūronai Žiūronas Nightstar 25x100, Omegon

Omegon Nightstar 25x100s are powerful large binoculars for nature watching and is an instrument that provides bright images for wide field astronomical observing .

Optics

With their 100mm objective diameter, the optics already collect 204 times more light than the dark-adapted eye (for a 7mm pupil). In addition, the 4mm exit pupil provides a bright, high-contrast image for nature watching during twilight. The oversized BaK4 prisms ensure a bright wide field of view. All optical surfaces are fully multi-coated to guarantee high light transmission. The eyepieces have 18mm of eye relief for particularly comfortable viewing, meaning even spectacle wearers can see the entire field of view.

Mechanics

The reinforced centre section with built-in metal tripod adapter allows the binoculars to be optimally mounted and counterbalanced on any standard tripod. Focusing is effected via precise adjustment at each eyepiece, ensuring optimal dioptric compensation. These binoculars are ideally designed for outdoor use, with their special shock-resistant construction protecting the optical alignment from knocks. The waterproof, nitrogen-filled bodies are constructed from durable aluminium alloy, ensuring continued enjoyment for their owner even after many years of use.

Observing

With a weight of only 3.35 kg these binoculars rank among the lighter large binoculars in the 100mm range. Nature watchers can use these fast binoculars for observing deer at the edge of the forest at dawn for example, or shy and retiring chamois up in the mountains. Distant ships can be observed at sea. There is virtually no end to all the different things an observer could see.

The advantages:

• fast optics thanks to a 100mm objective diameter and full multi-coating
• oversized BaK4 prisms
• 18mm of eye relief - so also ideal for spectacle wearers
• shock-proof and so robust collimation
• waterproof and nitrogen-filled to prevent fogging
• extremely sturdy tripod adapter

Included in delivery:

• 25x100 binoculars
• built-in tripod adapter with 3/8 inch thread
• cleaning cloth
• operating instructions

These binoculars have a tripod adapter with a 3/8" thread, but what if your tripod head has a 1/4" screw size? For this, there is the Berlebach C threaded sleeve which reduces the thread to 1/4" diameter.

Specifications:

Capacity
Type of build	Porro prisms
Magnification	25
Front lens diameter (mm)	100
Exit pupil (mm)	4,0
Eye relief (mm)	18,0
Diopter compensation	+/- 4
Interpupillar distance (mm)	60-72
Glass material	BaK-4
Lens coating	fully, multiple
Focusing system	Single focusing
Eyepiece cups	folding
Diopter-adjustment side	on both sides (Single eyepiece focusing)
Special features
Zoom function	-
Image stabilizer	-
Compass	-
Rangefinder	-
Splash-proof	yes
Protection bag	-
Threaded tripod connector	yes
Eyepieces for spectacle wearers	yes
Watertight	yes
Field of view
True field of view (°)	2,5
Apparent field of view (°)	-
Field of view at 1,000 m (m)	45
Close focus limit (m)	25,0
Light intensity	16,0
Twilight factor	50,0
General
Surface material	Rubber armouring
Length (mm)	450
Width (mm)	250
Height (mm)	150
Weight (g)	3350
Series	Nightstar
Colour	black
Area of application
Astronomy	good
Hunting	not recommended
Travel and sports	not recommended
Sailing	not recommended
Theatre	not recommended
Bird watching	not recommended