Athlon Helos BTR Gen2 1-10x28 vs Vortex Razor HD Gen III 1-10x24
Athlon Helos BTR Gen2 1-10x28 is a 1-10×28 SFP on a 34 mm tube with MOA turrets; Vortex Razor HD Gen III 1-10x24 is a 1-10×24 FFP on a 34 mm tube with MRAD turrets. The Athlon Helos BTR Gen2 1-10x28 is lighter by 3.2 oz. The Vortex Razor HD Gen III 1-10x24 has more elevation travel, 103.1 MOA to 100 MOA in the same unit. At its top magnification the Athlon Helos BTR Gen2 1-10x28 keeps a 2.8 mm exit pupil against 2.4 mm for the Vortex Razor HD Gen III 1-10x24 — estimated from the layout, not measured. On our last catalog check the Athlon Helos BTR Gen2 1-10x28 listed for about $3,413 less.
| Spec | AthlonAthlon Helos BTR Gen2 1-10x28 | VortexVortex Razor HD Gen III 1-10x24 |
|---|---|---|
| Approx. price | ~$587 | ~$4,000 |
| Magnification | 1-10× | 1-10× |
| Objective lens | 28 mm | 24 mm |
| Focal plane | SFP | FFP |
| Reticle | ATMR4 SFP IR MOA | EBR-9 MRAD |
| Illuminated | Yes | Yes |
| Turret unit | MOA | MRAD |
| Per click | 0.5 MOA (0.52″ at 100 yd) | 0.1 MRAD (0.36″ at 100 yd) |
| Elevation travel | 100 MOA (≈29.1 MRAD) | 30 MRAD (≈103.1 MOA) |
| Windage travel | 100 MOA | 30 MRAD |
| Zero stop | No | No |
| Turrets | Capped | Capped |
| Parallax | Fixed 100 yd | Fixed 150 yd |
| Eye relief | 3.2″ | 3.6″ |
| Field of view | 110–10 ft at 100 yd | 116–11.7 ft at 100 yd |
| Tube | 34 mm | 34 mm |
| Length | 10.3″ | 10.1″ |
| Weight | 18.3 oz | 21.5 oz |
| Warranty | Athlon Lifetime Warranty | VIP unlimited unconditional lifetime |
| Exit pupilest. | 28–2.8 mm (1×–10×) | 24–2.4 mm (1×–10×) |
| Twilight factorest. | 16.7 at 10× | 15.5 at 10× |
| Zoom ratioest. | 10× | 10× |
| Where to buy | Athlon → | Vortex → |
Tinted rows are where these two differ. Rows marked est. are computed, not published.
Exit pupil and twilight factor are computed from the published magnification and objective diameter, not measured. Real exit pupil is also capped by the erector at low magnification, and coatings and glass quality move low-light performance in ways the formula cannot see — read these as comparisons between layouts, not verdicts on scopes.