The Quick Verdict
Get the COOLSHOT 50i GII. At $299.95 versus $529.95, you're paying $230 more for the PROIII STABILIZED's headline feature — image stabilization — and getting a significantly shorter battery life in the bargain. For most golfers, that trade doesn't make sense. The PROIII STABILIZED is worth considering only if you genuinely struggle with a shaky hold and find yourself re-ranging the same flag two or three times per round. Check price at Amazon →
What They Have in Common
These two share more DNA than the price gap suggests. Both are 6x magnification, ±1 yard accurate, rated IPX4 for water resistance, and backed by Nikon's five-year warranty. Both use a red internal OLED display, CR2 lithium batteries, and Nikon's Hyper Read fast-acquisition tech. The Dual Locked-On and Quake features appear on both, as does slope mode with a toggle switch for tournament play.
Where They Differ
Image Stabilization — the Whole Argument
This is the comparison. The PROIII STABILIZED's name tells you exactly what you're paying for: optical image stabilization. When you're holding a rangefinder at arm's length trying to lock onto a flag 200 yards out, any hand tremor gets magnified. Stabilization smooths that out and can make it easier to confirm you've got the flag and not the tree behind it.
That's a real benefit. But here's the thing — the 50i GII's Dual Locked-On feature (with its "Quake" vibration confirmation) is specifically designed to address the same problem from a different angle. It locks the reading when it's confident you've got the right target. It's not stabilization, but it's a genuine solution for the "did I actually hit the flag?" anxiety. Whether you need optical stabilization on top of that depends on how steady your hands are, not on how serious a golfer you are.
Battery Life — the Surprising Gap
The PROIII STABILIZED runs on CR2 lithium batteries rated for roughly 2,700 measurements. The 50i GII? About 10,000. That's not a rounding difference — it's nearly four times the longevity. Seems like the stabilization mechanism draws meaningfully more power, which is the usual tradeoff with stabilized optics.
CR2 batteries are easy to find, so it's not a crisis either way. But the 50i GII is genuinely the more grab-and-go option. You can leave it in your bag for months and trust it'll fire up on Saturday morning.
Display and Auto-Brightness
Both units use a red internal OLED, but the PROIII STABILIZED's display includes auto-brightness adjustment. In practice, nobody reads a rangefinder in direct sunlight — you shade the eyepiece with your palm. Auto-brightness is a nice feature, not a game-changer.
Slope and Cart Magnet
The 50i GII has a built-in cart magnet. The PROIII STABILIZED, based on the spec data, does not list one. If you ride a cart and want your rangefinder stuck to the frame when you're not using it, that's a real quality-of-life difference in the 50i GII's favor.
Who Should Buy Which
Get the COOLSHOT 50i GII if:
- You want Nikon's slope tech, fast acquisition, and vibration confirmation without paying a $230 premium for a feature you may not need.
- You're the golfer who leaves a rangefinder in the bag between rounds and doesn't want to think about battery swaps.
- You ride a cart and actually use the magnet — it's a small thing until you've fumbled a rangefinder into a bunker.
- You're dialing in your yardages for approach shots and want a reliable, accurate tool that gets out of your way.
Get the COOLSHOT PROIII STABILIZED if:
- Your hands genuinely shake on rangefinder readings — maybe you've noticed it after a long walk, in cold weather, or you're just not naturally steady — and you find yourself re-ranging flags repeatedly.
- You prioritize the smoothest possible viewing experience and the $230 difference doesn't require much deliberation.
- You want the auto-brightness display for dawn or dusk rounds where lighting shifts noticeably.
The Bottom Line
The PROIII STABILIZED is a genuinely good rangefinder. But $230 is real money, and what it buys you here is primarily image stabilization and auto-brightness — against a battery life penalty of about 7,300 measurements. The 50i GII covers everything most golfers actually need: slope, fast target lock, vibration confirmation, cart magnet, and a five-year warranty. It's the better value by a wide margin, and value doesn't mean compromise in this case.