What They Have in Common
Both land at the same price tier, both hit ±1 yard accuracy, both have slope with a legal switch for tournament play, and both use a 6x LCD setup. Water resistance is present on each — the A1-Slope at IPX6, the ULT-S listed as rainproof. Neither is going to embarrass you on the course.
Where They Differ
Size, Weight, and the Pocket Factor
The A1-Slope is genuinely small. At 3.75 × 1.42 × 2.36 inches and 5.1 oz, Bushnell calls it their smallest rangefinder ever, and that tracks — it's closer to a thick AA battery than a traditional rangefinder. If you walk and carry, or if your bag pocket is already stuffed, that size matters. TecTecTec doesn't publish dimensions or weight for the ULT-S, which makes a direct comparison impossible. Call it a hunch — brands usually omit that data when the numbers aren't a selling point — but I wouldn't assume it matches the A1-Slope for portability.
Optics and Acquisition
This is where the ULT-S makes its case. Optical image stabilization on a rangefinder smooths out hand tremor when you're trying to lock onto a flag 200 yards out. If you've ever watched your reticle bounce around while your playing partners are waiting on you, OIS is a real quality-of-life upgrade. The Hyper-Read feature is about acquisition speed — getting a lock faster, especially on targets that aren't cooperating. The A1-Slope doesn't list stabilization of any kind. Both have 6x magnification on paper, but stabilized 6x and unstabilized 6x feel different when you're actually using them. The ULT-S also includes a fog mode, which is genuinely useful if you tee off early on cool mornings when there's moisture in the air.
Battery and Long-Term Ownership
Here's a real difference that's easy to underweight at purchase time. The A1-Slope is USB-C rechargeable with 50+ rounds per charge — roughly 3,000 actuations. That's two or three seasons of regular play before you're thinking about the battery at all, and when you do need a charge, it's the same cable as your phone. The ULT-S runs on a CR123 lithium battery. CR123s are available at most pharmacies and hardware stores, so you're not stranded, but you're also buying and swapping batteries eventually. Neither is a dealbreaker, but the USB-C setup is genuinely more convenient for most people in 2024.
Build and Water Resistance
IPX6 is a meaningful spec — it means the A1-Slope can handle direct water jets, not just light rain. The ULT-S is listed as "rainproof," which is a softer claim. If you play through weather regularly, that gap matters. The A1-Slope also has the BITE magnetic skin for cart mounting. Small thing, but useful if you like keeping your rangefinder accessible mid-round rather than fishing it out of a pocket every hole.
Who Should Buy Which
Get the Bushnell A1-Slope if:
- You want the most pocketable rangefinder Bushnell makes and you're tired of chunky devices eating your carry bag space
- You play 30+ rounds a year and don't want to think about batteries — USB-C means you plug it in with your phone, not make a pharmacy run
- You play in variable conditions and want the harder water-resistance rating (IPX6 vs. rainproof)
- You're the player who forgets to swap batteries before a tournament and has paid for it before
Get the TecTecTec ULT-S if:
- Your hand isn't the steadiest and you've had rangefinders wander on you — OIS makes a real difference when you're trying to lock a flag 180 out while your partner's on the clock
- You routinely play early morning rounds in fall or spring when fog and moisture are actual factors
- You prefer swappable batteries and always keep a CR123 in your bag as a backup
- You want faster target lock and the stabilized view is worth more to you than the smaller form factor
The Bottom Line
The $21 price gap basically doesn't exist as a deciding factor here. What it comes down to is: do you want a rangefinder that's built around convenience and portability, or one that's built around steadier optics and faster acquisition? The A1-Slope wins on form factor, battery system, and weather protection. The ULT-S wins if you value stabilized glass. For most golfers playing regular recreational rounds — not just early-morning foggy ones — the A1-Slope's USB-C charging, smaller footprint, and stronger water rating tip it over the line.
Get the Bushnell A1-Slope.
See Also