SWFA SS 10x42 Gen 2 vs SWFA SS 3-15x42 Gen 2 FFP
SWFA SS 10x42 Gen 2 is a 10×42 SFP on a 30 mm tube with MRAD turrets; SWFA SS 3-15x42 Gen 2 FFP is a 3-15×42 FFP on a 30 mm tube with MRAD turrets. The SWFA SS 10x42 Gen 2 is lighter by 1.9 oz. The SWFA SS 10x42 Gen 2 has more elevation travel, 137.5 MOA to 123.8 MOA in the same unit. At its top magnification the SWFA SS 10x42 Gen 2 keeps a 4.2 mm exit pupil against 2.8 mm for the SWFA SS 3-15x42 Gen 2 FFP — estimated from the layout, not measured. On our last catalog check the SWFA SS 10x42 Gen 2 listed for about $400 less.
| Spec | SWFASWFA SS 10x42 Gen 2 | SWFASWFA SS 3-15x42 Gen 2 FFP |
|---|---|---|
| Approx. price | ~$350 | ~$750 |
| Magnification | 10× | 3-15× |
| Objective lens | 42 mm | 42 mm |
| Focal plane | SFP | FFP |
| Reticle | Mil-Quad | Mil-Quad |
| Illuminated | No | No |
| Turret unit | MRAD | MRAD |
| Per click | 0.1 MRAD (0.36″ at 100 yd) | 0.1 MRAD (0.36″ at 100 yd) |
| Elevation travel | 40 MRAD (≈137.5 MOA) | 36 MRAD (≈123.8 MOA) |
| Windage travel | 40 MRAD | 36 MRAD |
| Zero stop | Yes | Yes |
| Turrets | Exposed | Exposed |
| Parallax | Rear focus from 10.9 yd | Side focus from 6.6 yd |
| Eye relief | 3.6″ | 3.8–4.2″ |
| Field of view | 11.8 ft at 100 yd | 34.8–7.2 ft at 100 yd |
| Tube | 30 mm | 30 mm |
| Length | 14.1″ | 13.7″ |
| Weight | 20.8 oz | 22.7 oz |
| Warranty | SWFA SS 4-LIFE Warranty | SWFA SS 4-LIFE Warranty |
| Exit pupilest. | 4.2 mm | 14–2.8 mm (3×–15×) |
| Twilight factorest. | 20.5 at 10× | 25.1 at 15× |
| Zoom ratioest. | Fixed power | 5× |
| Where to buy | SWFA → | SWFA → |
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.