Pleiades 111 Septuplet APO
William Optics
From ~$4,016.75
2 stores
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The William Optics Pleiades 111 Septuplet APO is a premium 111mm f/4.8 astrograph specifically designed for serious astrophotographers seeking precise wide-field imaging with full-frame sensors. Featuring an innovative internal focusing design (WIFD) that moves the optics rather than the imaging train, it eliminates vignetting and sensor tilt while maintaining a rigid, stable structure ideal for heavy modern cameras. The seven-element optical system incorporates premium FPL-53 Super ED glass to deliver exceptional color correction and a 48mm flat image circle, making it equally capable of capturing detailed wide-field nebulae and medium deep-sky objects.
Specifications
| Weight (Complete) | 10.315 kg |
| EAF Compatible | ✓ |
| Optical design | 7-element Septuplet APO with built-in flattener |
| Focus Travel | 0 mm |
| Focal length | 528 mm |
| Focuser Type | WIFD (William Optics Internal Focus Design) |
| Camera Adapters | M48 & M54 |
| Included Accessories | Dual dust cover/Bahtinov mask, dew shield, tilt adapter, camera rotator, mounting ring, dovetail, saddle handlebar, soft case |
| Aperture | 111 mm |
| Image Circle | 48 mm |
| Weight (OTA Only) | 7.95 kg |
| Glass Type | FPL-53 Super ED |
| Recommended Back Focus | 55 mm |
| Focal ratio | f/4.8 |
| Focuser Speed | Dual-speed 10:1 Rack & Pinion |
| Tube Length | 645 mm |