Kowa
Kowa TSN-99A Prominar
$3750
2 sellers$3750–$4499read
Best Spotting Scopes · head-to-head
Kowa TSN-99A Prominar vs Leupold SX-4 Pro Guide HD 20-60x85mm
A sourced, side-by-side comparison. Leupold SX-4 Pro Guide HD 20-60x85mm is cheaper at $999.99. Every spec and price links to its source.
Leupold
Leupold SX-4 Pro Guide HD 20-60x85mm
$999.99Cheaper
Which is better: the Kowa TSN-99A Prominar or Leupold SX-4 Pro Guide HD 20-60x85mm?
On the specs we track, they're closely matched. The Leupold SX-4 Pro Guide HD 20-60x85mm is the cheaper at $999.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec |  Kowa TSN-99A Prominar |  Leupold SX-4 Pro Guide HD 20-60x85mm |
|---|---|---|
| US price | $3750 | $999.99 |
| Brand | Kowa | Leupold |
| Released | — | — |
| Objective lens (mm) | 99 | 85 |
| Magnification range | 30-70x | 20-60x |
| Glass type | fluorite | HD |
| Viewing angle | angled | angled |
| Field of view ft1000yd | 105 | 91.7 |
| Close focus (ft) | — | 22 |
| Eye relief (mm) | 17 | 19 |
| Waterproof | Yes | Yes |
| Nitrogen purged | Yes | Yes |
| Length (in) | — | 17.7 |
| Weight (oz) | — | 78.2 |
Sources — Kowa TSN-99A Prominar: kowaoptics.com (verified 2026-10-20). Leupold SX-4 Pro Guide HD 20-60x85mm: leupold.com (verified 2026-10-20).
What's the difference between the Kowa TSN-99A Prominar and Leupold SX-4 Pro Guide HD 20-60x85mm?
Where the two actually differ on the specs we track (5 of 11). Matching specs are omitted.
- Objective lens (mm): Kowa TSN-99A Prominar 99 vs Leupold SX-4 Pro Guide HD 20-60x85mm 85
- Magnification range: Kowa TSN-99A Prominar 30-70x vs Leupold SX-4 Pro Guide HD 20-60x85mm 20-60x
- Glass type: Kowa TSN-99A Prominar fluorite vs Leupold SX-4 Pro Guide HD 20-60x85mm HD
- Field of view ft1000yd: Kowa TSN-99A Prominar 105 vs Leupold SX-4 Pro Guide HD 20-60x85mm 91.7
- Eye relief (mm): Kowa TSN-99A Prominar 17 vs Leupold SX-4 Pro Guide HD 20-60x85mm 19