I was contacted by Discovery Optics a few months ago to review their new ED-PRS scope. What I got was a scope in a large box filled with accessories. Usually when you get a ton of stuff with a scope this is a bad sign; they are cheap accessories designed to distract you from a mediocre scope. The Discovery ED-PRS on the other hand contained some high quality accessories that were a step above what you’d often get with some other scope brands.

Instead of a simple sheet of fabric cleaning cloth, the ED-PRS came with a soft chamois. In addition to the chamois, it also included a photography lens cleaning pen with an optical nano carbon cleaning tip. It included a set of high-profile scope rings with recoil lugs and printed torque markings.

In the box was an all metal scope level kit which helps you level and square your scope to your rail. I’ve only seen this tool is usually sold as an after-market accessory. And perhaps the most unusual items was a 3-piece sun shade tube which ads about another 10″ to the 13″ long scope.

The scope itself was sizable. It weighs 24oz but feels heavier. Its most notable feature are its oversized turrets. The ED-PRS’s turrets are even wider and taller than an Arken EP5. The turrets are non-locking, resettable and contain a cog wheel style zero-stop similar to Athlon’s Gen2 scopes. The turrets have brass cores and were loud and tactile with no slop.

The turrets, wheels, and nobs feature aggressive fine knurling, which along with being oversized make them generally easy to turn even when wearing gloves. All except for the magnification power ring which was exceedingly stiff and difficult to turn; even with the removable throw lever attached. I found myself really having to manhandle the lever to change magnification which severely impact performance for hunting or competition.

Not that I would take this scope hunting. I think it’s probably too bulky and heavy for most hunters (except those shooting from pimped out blinds or truck beds). The ED-PRS is probably best suited for precision bench-rest shooting with its easy to read markings and fine lined first focal plane reticle. While the scope features a ELR style Christmas tree reticle, serious long range shooters may be disappointed with the glass.

The ED-PRS has what they call a SFIR reticle, which looks a lot like the Arken VPR reticle but with more subtension markings. Like the Arken, the Discovery’s reticle only illuminates the very center cruciform of the reticle, creating something of a red-dot effect when used in low magnification. The illuminator has 6 brightness settings each separated by an OFF setting.

The first unit I received also had a very dim illuminator. Even with the scope cap on I could barely see the illuminated center cross at its highest illumination setting. Discovery sent me and a replacement scope and return label for the defective scope but the process took 3 weeks. They did warm me of the delay due to Lunar New Year which causes many delays in factory production in China. The new scope had a much brighter illumination but even this was not quite daylight bright.

Looking through the scope the image was surprisingly good for a budget scope. Bright with good center to edge sharpness. The other edge of the sight picture had only a hint of distortion even at 25x. The scope kept focus and point of aim throughout its magnification range. The eye box and eye relief were good for a budget scope.

The scope advertises ED glass but I noted some softness in detail at long range that I attribute to chromatic aberration. This was noticeable in mid day light with the target backlight. Overall resolution was better than average for the scopes price tier but not the best in its class. The ED-PRS was still sharp enough to allow me to pick out .22cal holes on paper at 100yrs.

The ED-PRS’ glass is not in the same league as a Leupold VX, Athlon Argos, Vortex Diamond Back Tactical, or even an Arken EP5. But when comparing what you get in the box for a street price of $399 (as of this writing) I would still consider the ED-PRS a good value. If you’re a beginning long-range shooter with a limited budget, this scope is something to consider.

This scope is available through my Affiliate links

Amazon: https://amzn.to/3Ukni4t

RESOLUTION
Group: -1
Element: 3

OVERALL RATINGS (out 5)
Build: 4
Glass: 3.5
Reticle: 4.5
Holds Zero: 5
Box Test: 5
Turrets: 5
Eye Box: 4
Value: 5

ED-PRS SPECS
Magnification :5-25x
Objective Lens: 56mm
Reticle: SFIR FFP
Field of view:4.68°-0.93°
Exit pupil:11.16-2.24mm
Eye relief :87-85mm (3.5″)
Click Value :0.1MRAD
Elv adjust range: :15MRAD
Win adjust range: 8.7MRAD
Tube diameter :34mm
Length :13in
Weight :23.99oz