Why order from Agena instead of directly from William Optics?
You may find this item available for sale on William Optics' website for a bit less than our price. Here's why you should consider buying from us instead:
- You will be subject to import customs fees of at least 8%, plus possible additional handling/packaging fees and paperwork if you import directly from Taiwan. We've already taken care of this, so you will not have to pay anything extra if you buy from us.
- We ship from stock from our warehouse in Los Angeles. William Optics ships directly from Taiwan.
- We open and inspect the telescope before re-shipping it to you.
- For any warranty/support issues, you can contact us directly instead of dealing with an overseas location.
Packages Available
OTA Package [A-M90-B]
- Black 90mm Mounting Rings
- OTA Package as described above
- 2" 99% Dielectric Carbon Fiber Diagonal
Product Information
The hottest refractor of the year - Megrez 90mm Doublet air spaced FPL-53 objective with STM coatings, f/6.9. A new breakthrough in mechanical and optical perfection. Reviewed in Sky & Telescope (May 2007) astronomy magazine with great success!
Please note that the version with the L mounting bracket and hard carrying case has been discontinued. It is now necessary to mount the scope with 90mm CNC tube rings (included).
Optically Unbeatable
- Highly precise CNC machined lens cell.
- Doublet air spaced lens in adjustable lens cell. Highest-quality coatings, STM coated.
Power Linear Focuser
- Extra-smooth 2.5" Power Linear focuser: a treat to use during photography. No more image shift!
- 360 deg. rotatable.
- Extra-heavy duty.
- Large aluminum knobs.
- Graduated scale for precise camera alignment.
Simply Beautiful Finish
- Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube, golden finish, retractable dewshield, 360 deg. rotatatable Power Linear focuser, dewshield cap.
- 90mm mounting rings.
Attention to Details
- 2" to 1.25" adapter included in the price.
- Anti-marring brass compression rings.
- Dedicated field flattener available separately.
Total Quality
- Each scope is tested several times both for mechanical performance and optical performance (high-power star testing) by William Optics.
Soft Case
- Stow away your telescope in the practical and safe high quality soft case.
- Though you will never need it, you have a 2-year warranty from WO, and the certainty that we will be there to assist you even beyond that, if you need!
| Aperture | 90mm |
| Focal Ratio | f/6.9 |
| Focal Length | 621mm |
| Objective Type | Doublet FPL-53 Air Spaced, Fully Multi-Coated, STM Coatings |
| Resolving Power | 1.35" |
| Limiting Magnitude | 11.5 |
| Lens Shade | Retractable |
| Focuser | 2" 360-deg Rotating Camera-angle Adjuster 1:10 Dual Speed Fine Focus 1.25" Adapter Included |
| 1.25" Adapter | Brass Compression Rings |
| Tube Diameter | 90mm |
| Tube Length | 16.9" (430mm) Fully Retracted, 20.5" (520mm) Fully Extended |
| Tube Weight | 7.3 lbs. (3.35kg) |
| Case | Soft Case |
- You will be subject to import customs fees of at least 8%, plus possible additional handling/packaging fees and paperwork if you import directly from Taiwan. We've already taken care of this, so you will not have to pay anything extra if you buy from us.
- We ship from stock from our warehouse in Los Angeles. William Optics ships directly from Taiwan.
- We open and inspect the telescope before re-shipping it to you.
- We are an authorized William Optics Dealer. For any warranty/support issues, you can contact us directly instead of dealing with an overseas location.



