FLT-91 f/5.9 APO (RED)
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William Optics FLT-91 f/5.9 APO (RED)
- Price
- 2 859,00€
- Availability
- Backorder
- Estimated delivery time 3-18 days
Product description
The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. The three-element optical design features a 91mm aperture using FPL-53 glass. The STM-coatings and superb quality provide excellent optical performance and unmatched value.
Product details
| Lens type: | Apochromatic triplet lens with FPL53 |
| Aperture: | 91 mm |
| Focal length: | 540 mm |
| Focal ratio: | f/5.9 |
| Strehl ratio: | 0.95+ |
| Test report: | Zygo test report available at additional cost |
| Suitable camera formats: | Full Frame DSLR / Mirrorless / CMOS / CCD |
| Recommended flatteners: | FLAT 6A III x0.8, FLAT 68 III x1.0 |
| Flattener Adjustment: | FLAT 6A III x0.8 with 5.4 mm |
| Focuser: | Dual speed 3.3" R&P focuser |
| T-Mounts supported: | Canon EF, RF; Nikon F, Z; Sony E; Pentax K; Micro Four Thirds (M4/3); FUJI X |
| Color: | Red |
| Retracted length: | 441 mm |
| Extended length: | 510 mm |
| Extension tube length: | 40 mm |
| Weight (OTA only): | 4.165 kg |
| Weight: | 5.575 kg |
| Extension tube weight: | 0.105 kg |
Shipping costs
- GLS/EuroParcel
- 15,90 €
- European delivery 2-5 days.
- PostNord Parcel locker
- 5,90 €
- PostNord Home deliver
- 19,00 €
- Environmentally friendly delivery to your door at the agreed time. Trackable deliveries in real time even in the evenings in the biggest cities. Change your delivery as required.
- UPS Standard
- 14,90 €
- Delivery to Europe in 2 to 5 days.
- Postipaketti
- 5,90 €
- Kotipaketti
- 12,90 €