Well guys here's my review on the Yukon Sentinel NVRS 2.5x50

http://www.nvexpert.eu/page_image/pr...ntinel%205.jpg
http://www.nvexpert.eu/page_image/pr...tinel%201a.jpg


General Overview & Specifications

Received the NV in very good condition, more or less brand new in the box, Cordura carrying case w/shoulder strap, and manuals/registration card and even a couple of Duracell batteries!
It weighs 980g which is less than I thought.
The overall length is 288mm/9in and the width is 90mm/3.5in.
The objective lens is more than 2.4in in diameter and the eyepiece is 2in wide, with a soft rubber concertina eyecup to stop rearward light entering the sight.
On right side of the body is the external IR illuminator, which has a variable spot or flood beam function that helps to boost the image brightness. Beneath this is the battery housing, which holds two standard AA batteries. Behind this is the main control toggle with three position settings. The switch is off in the forward position, on in the middle position and activates the IR illuminator when switched to the back.
The rail mount is very solid and all metal, is a weaver fit and well finished however being a weaver fitment means you need a weaver to dovetail adaptor.
All the user adjustments, battery compartments and the front lens are covered with the front lens cover tethered to the body of the scope. The eye-relief cup is deep and serves well to keep fingers and stuff away from the rear lens & the diopter adjustment is smooth and holds position well.
First impression of the performance was made indoors(the kitchen!).
For close range work (under 10m)in total darkness the scope cap needed to be left on due to flare when the IR was activated.
The image quality is good enough to read a non-illuminated LCD digital clock from 10m away (1/2" tall display size on the clock).

Range Finding Reticle

http://night-optics.ru/media/imm_sentinel_ru5.jpg
http://i39.photobucket.com/albums/e1...n/IMG_0384.jpg

The reticle (pictured above) is adjustable using elevation and windage turrets which proved to be a bit puzzling at first.

Normally if a pellet strikes too far to the left, then you adjust the windage turrets to the right, but with the Yukon it is the other way round.
http://i39.photobucket.com/albums/e1.../nvcontrol.jpg
They are adjusted using the same type of adjusters on a normal scope but has 1/2" adjustments at 100m instead of the usual 1/8 or 1/4 and can be made bright enough to be seen even when the scope is in full saturation, that it is "blinded" to the point where the image tube is nothing but a green blob. The highest setting is just way too bright in zero-light conditions.
The range finding part if you read the instructions should be done by zeroing at 50m, obviously we dont want to be doing that with an air rifle so I zeroed at 30m and calibrated the scope in the normal way by moving out to the various distances and making a "cheat sheet".

All in all I'm impressed with the clarity but I've also invested in the Yukon doubler and a laser illuminator to aid in detection and range finding as it does prove difficult when using NV.

Darryl