| Meade-ETX70 (70mm) Refractor 350mmFL @f/5.0 |
| Design | Focal Length (mm) |
Apparent Field (°) |
Barrel Size |
Mag. (x) |
Exit Pupil (mm) |
True Field (°) |
True Field @1000 yards (feet) |
Mag.
w/2x Barlow |
Mag.
w/2x Big Barlow or Powermate |
Mag. w/2.5x Powermate |
Mag. w/3x Barlow |
Mag. w/4x Powermate |
Mag. w/5x Powermate |
| Plössl | 55 | 50 | 2" | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Plössl | 40 | 43 | 1¼" | 8.8 | 8.0 | 4.4 | 231.4 | 17.5 | 17.5 | 21.9 | 26.3 | 35.0 | 43.8 |
| Plössl | 32 | 50 | 1¼" | 10.9 | 6.4 | 4.4 | 231.4 | 21.9 | 21.9 | 27.3 | 32.8 | 43.8 | 54.7 |
| Plössl | 25 | 50 | 1¼" | 14.0 | 5.0 | 3.5 | 181.7 | 28.0 | 28.0 | 35.0 | 42.0 | 56.0 | 70.0 |
| Plössl | 20 | 50 | 1¼" | 17.5 | 4.0 | 2.8 | 146.6 | 35.0 | 35.0 | 43.8 | 52.5 | 70.0 | 87.5 |
| Plössl | 15 | 50 | 1¼" | 23.3 | 3.0 | 2.1 | 108.0 | 46.7 | 46.7 | 58.3 | 70.0 | 93.3 | 116.7 |
| Plössl | 11 | 50 | 1¼" | 31.8 | 2.2 | 1.5 | 78.0 | 63.6 | 63.6 | 79.5 | 95.5 | 127.3 | 159.1 |
| Plössl | 8 | 50 | 1¼" | 43.8 | 1.6 | 1.1 | 55.7 | 87.5 | 87.5 | 109.4 | 131.3 | 175.0 | 218.8 |
| Radian | 18 | 60 | 1¼" | 19.4 | 3.6 | 3.0 | 156.9 | 38.9 | 38.9 | 48.6 | 58.3 | 77.8 | 97.2 |
| Radian | 14 | 60 | 1¼" | 25.0 | 2.8 | 2.4 | 123.4 | 50.0 | 50.0 | 62.5 | 75.0 | 100.0 | 125.0 |
| Radian | 12 | 60 | 1¼" | 29.2 | 2.4 | 2.1 | 108.0 | 58.3 | 58.3 | 72.9 | 87.5 | 116.7 | 145.8 |
| Radian | 10 | 60 | 1¼" | 35.0 | 2.0 | 1.7 | 90.0 | 70.0 | 70.0 | 87.5 | 105.0 | 140.0 | 175.0 |
| Radian | 8 | 60 | 1¼" | 43.8 | 1.6 | 1.4 | 71.1 | 87.5 | 87.5 | 109.4 | 131.3 | 175.0 | 218.8 |
| Radian | 6 | 60 | 1¼" | 58.3 | 1.2 | 1.0 | 54.0 | 116.7 | 116.7 | 145.8 | 175.0 | 233.3 | 291.7 |
| Radian | 5 | 60 | 1¼" | 70.0 | 1.0 | 0.9 | 45.4 | 140.0 | 140.0 | 175.0 | 210.0 | 280.0 | 350.0 |
| Radian | 4 | 60 | 1¼" | 87.5 | 0.8 | 0.7 | 36.0 | 175.0 | 175.0 | 218.8 | 262.5 | 350.0 | 437.5 |
| Radian | 3 | 60 | 1¼" | 116.7 | 0.6 | 0.5 | 28.3 | 233.3 | 233.3 | 291.7 | 350.0 | 466.7 | 583.3 |
| Panoptic | 41 | 68 | 2" | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Panoptic | 35 | 68 | 2" | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Panoptic | 27 | 68 | 2" | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Panoptic | 24 | 68 | 1¼" | 14.6 | 4.8 | 4.4 | 231.4 | 29.2 | 29.2 | 36.5 | 43.8 | 58.3 | 72.9 |
| Panoptic | 22 | 68 | 2" & 1¼" | 15.9 | 4.4 | 4.1 | 214.3 | 31.8 | 31.8 | 39.8 | 47.7 | 63.6 | 79.5 |
| Panoptic | 19 | 68 | 1¼" | 18.4 | 3.8 | 3.5 | 182.6 | 36.8 | 36.8 | 46.1 | 55.3 | 73.7 | 92.1 |
| Panoptic | 15 | 68 | 1¼" | 23.3 | 3.0 | 2.8 | 146.6 | 46.7 | 46.7 | 58.3 | 70.0 | 93.3 | 116.7 |
| Nagler 5 | 31 | 82 | 2" | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Nagler 5 | 26 | 82 | 2" | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Nagler 4 | 22 | 82 | 2" | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Nagler 5 | 20 | 82 | 2" | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Nagler 4 | 17 | 82 | 2" | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Nagler 5 | 16 | 82 | 1¼" | 21.9 | 3.2 | 3.6 | 189.4 | 43.8 | 43.8 | 54.7 | 65.6 | 87.5 | 109.4 |
| Nagler 6 | 13 | 82 | 1¼" | 26.9 | 2.6 | 2.9 | 150.9 | 53.8 | 53.8 | 67.3 | 80.8 | 107.7 | 134.6 |
| Nagler 4 | 12 | 82 | 2" & 1¼" | 29.2 | 2.4 | 2.8 | 146.6 | 58.3 | 58.3 | 72.9 | 87.5 | 116.7 | 145.8 |
| Nagler 6 | 11 | 82 | 1¼" | 31.8 | 2.2 | 2.4 | 127.7 | 63.6 | 63.6 | 79.5 | 95.5 | 127.3 | 159.1 |
| Nagler 6 | 9 | 82 | 1¼" | 38.9 | 1.8 | 2.0 | 106.3 | 77.8 | 77.8 | 97.2 | 116.7 | 155.6 | 194.4 |
| Nagler 6 | 7 | 82 | 1¼" | 50.0 | 1.4 | 1.6 | 83.1 | 100.0 | 100.0 | 125.0 | 150.0 | 200.0 | 250.0 |
| Nagler 6 | 5 | 82 | 1¼" | 70.0 | 1.0 | 1.1 | 60.0 | 140.0 | 140.0 | 175.0 | 210.0 | 280.0 | 350.0 |
| Nagler | 4.8 | 82 | 1¼" | 72.9 | 1.0 | 1.1 | 56.6 | 145.8 | 145.8 | 182.3 | 218.8 | 291.7 | 364.6 |
| Nagler 6 | 3.5 | 82 | 1¼" | 100.0 | 0.7 | 0.8 | 41.1 | 200.0 | 200.0 | 250.0 | 300.0 | 400.0 | 500.0 |
| Nagler 6 | 2.5 | 82 | 1¼" | 140.0 | 0.5 | 0.6 | 29.1 | 280.0 | 280.0 | 350.0 | 420.0 | 560.0 | 700.0 |
| Nagler | 7 | 82 | 1¼" | 50.0 | 1.4 | 1.5 | 80.6 | 100.0 | 100.0 | 125.0 | 150.0 | 200.0 | 250.0 |
| Nagler Zoom | 2 - 4 | 50 | 1¼" | 175.0 - 87.5 | 0.4 - 0.8 | 0.3 - 0.5 | 14.6 - 28.3 | 350.0 - 175.0 | 350.0 - 175.0 | 437.5 - 218.8 | 525.0 - 262.5 | 700.0 - 350.0 | 875.0 - 437.5 |
| Nagler Zoom | 3 - 6 | 50 | 1¼" | 116.7 - 58.3 | 0.6 - 1.2 | 0.4 - 0.8 | 22.3 - 43.7 | 233.3 - 116.7 | 233.3 - 116.7 | 291.7 - 145.8 | 350.0 - 175.0 | 466.7 - 233.3 | 583.3 - 291.7 |
| Click Stop Zoom | 8 - 24 | 55 - 40 | 1¼" | 43.8 - 14.6 | 1.6 - 4.8 | 1.2 - 2.7 | 65.1 - 143.1 | 87.5 - 29.2 | 87.5 - 29.2 | 109.4 - 36.5 | 131.3 - 43.8 | 175.0 - 58.3 | 218.8 - 72.9 |