can u see clearly at night, the sky, stars etc

Probably the moon, but the skymaster are more suited for night.

what does porro mean and what does it do to make these binos better ?

How Binoculars WorkThere are two basic types of binoculars: porro prisms and roof prisms.1. Porro-prism binocularsPorro-prism binoculars have a right-angled bend between the objective lens and the eyepiece, which makes them form an M shape when standing on their objective lenses. Porros rely on an external focus mechanism, which causes the eyepieces to slide forward or backward along an external tube. This design provides precise focusing and sharp images of close-proximity subjects as near as six to 10 feet.Reasons to buy:Brighter images due to greater transmission of lightFast focusingClose focusingWide field of viewThings to consider:Increased weight from large prismsThe bulky design can make porros harder to hold for those with small handsThe external focusing mechanism is more easily jarred out of alignment2. Roof-prism binocularsRoof-prism binoculars are typically straight with the objective lens in line with the eyepiece. They take on an H shape when stood upright. Most of the focusing hardware is housed inside the binocular, with an external focusing knob or wheel. Recent design advances have enabled roof-prism binoculars to focus as close as, if not closer than, their porro counterparts. Roof-prism binoculars have grown in popularity in the past few decades, primarily because many leading optics manufacturers are producing high-quality roof-prism optics. At the mid- to high-price range, roof-prism binoculars dominate the optics market.Reasons to buy:Ease of handlingClose focusing in advanced modelsIncreased durability from fewer external moving partsBetter power-to-weight ratio-a 10x roof-prism binocular weighs less than a 10x porroThings to consider:More expensive because of the need for special prism coatings to increase image brightness

ASIN	B006ZN4TZS
Batteries Included	No
Batteries Required	No
Best Sellers Rank	#7,463 in Electronics ( See Top 100 in Electronics ) #5 in Binoculars
Brand	Celestron
Compatible Devices	tripod
Country of Origin	China
Customer Reviews	4.0 4.0 out of 5 stars (6,054)
Date First Available	11 July 2012
External memory included	No
Generic Name	Binocular
Has Image Stabilisation	No
Imported By	A&S Creations, 6/7, Ground Floor, West Patel Nagar New Delhi-110008
Importer	A&S Creations, 6/7, Ground Floor, West Patel Nagar New Delhi-110008
Includes AC Adapter	No
Includes Rechargeable Battery	No
Is there a timer?	No
Item Dimensions LxWxH	20.3 x 17.8 x 6.4 Centimeters
Item Weight	765 g
Item model number	71256
Lens type	Objective Lens
Manufacturer	Celestron
Material	Aluminium
Maximum magnification	10
Min Focal Length	56
Model	71256
Model Name	Upclose G2
Model Year	2014
Mounting Hardware	Binocular \| Carrying case\| Objective covers\| Eyepiece covers\| Lens cloth\| Instruction manual
Mounting Type	Tripod Mount
Net Quantity	6 Count
Number of items	1
Optical zoom	10 x
Packer	A&S Creations, 6/7, Ground Floor, West Patel Nagar New Delhi-110008
Product Dimensions	20.32 x 17.78 x 6.35 cm; 765 g
Special Features	Long Eye Relief

71256 G2 10x50 Upclose Wide-Angle Porro Binocular (Black)

Details

Description

Specifications

Common Questions