Explore Scientific AP 127/952 ED Alu Essential OTA
With a 127mm triplet objective, the Explore Scientific AP 127/952 ED Alu Essential OTA provides a 952mm focal length, aluminum construction, and dual-speed focusing hardware.
- 127mm aperture provides 0.91-arcsecond resolution
- 952mm focal length uses f/7.5 optics
- FCD1 triplet objective supports listed imaging
- 2.0-inch focuser provides 10:1 adjustment
- Cradle rings and Vixen plate included
- 10-year warranty requires online registration
In Stock
Description
Greater aperture and a 952 mm focal length shape the Explore Scientific AP 127/952 ED Alu Essential OTA, a 127 mm triplet apochromatic refractor with listed f/7.5 optical ratio. Its machined aluminum tube includes a 2-inch rack-and-pinion focuser with 10:1 reduction, dielectric diagonal, Vixen-style dovetail, cradle rings with handle, retractable dew shield, and mounting hardware for a compatible visual or imaging platform selected separately.
The Hoya FCD1 ED element forms part of the triplet objective, while the 127 mm aperture and 952 mm focal length support the supplied planetary, double-star, wide-field, and supported astrophotography applications. The OTA is supplied without a complete mount, so payload support, tracking, camera spacing, guiding, and final operational stability depend on the separately selected telescope platform and accessories.
Key Features of Explore Scientific AP 127/952 ED Alu Essential OTA
This standalone apochromatic refractor combines a 127 mm triplet objective with Hoya FCD1 ED glass, a 952 mm focal length, aluminum optical tube, 2-inch 10:1 focuser, dielectric diagonal, cradle rings, carrying handle, Vixen mounting plate, and retractable dew shield.
- 127 mm triplet apochromatic refractor
- 952 mm focal length with listed f/7.5 optical ratio
- Hoya FCD1 extra-low dispersion glass
- Enhanced multi-lens coating matrix
- Machined aluminum optical tube
- 2-inch focuser with 10:1 reduction
- 2-inch dielectric diagonal
- Cradle rings, handle, dovetail, and dew shield
High-Resolution Visual and Imaging Use
The supplied application focuses on planetary observation, double-star resolution, lunar viewing, and supported astrophotography using the larger 127 mm triplet optical tube, while mount capacity, tracking performance, camera compatibility, guiding, focus spacing, and image results depend on the separately selected support system and observing conditions.
Why Choose Explore Scientific AP 127/952 ED Alu Essential OTA
The 127 mm FCD1 aluminum OTA is relevant when a larger triplet refractor is needed for detailed visual observation and supported imaging, with a 2-inch focuser, 10:1 reduction, dielectric diagonal, cradle rings, carrying handle, Vixen plate, dew shield, and a modular mount-ready design.
- 127 mm triplet aperture for higher-resolution listed applications
- FCD1 ED glass with 10:1 dual-speed focusing
- Diagonal, cradle rings, handle, dovetail, and dew shield included
Explore Scientific 10-Year Extended Warranty
The supplied product information lists a 10-year extended warranty that requires online registration, and the applicable registration process, deadline, regional eligibility, optical coverage, focuser coverage, accessory coverage, and authorized service requirements should be verified before purchase and completed according to the manufacturer’s warranty terms.
Explore Scientific AP 127/952 ED Alu Essential OTA Specs
| Brand | Explore Scientific |
| Full Model Code | Explore Scientific ED Apochromatic Refractor 127mm f/7.5 FCD1 Aluminum Essential OTA (0112126) |
| Country of Origin | United States / China |
| Optical Design | Apochromatic Refractor (Triplet Objective Lens) |
| Aperture | 127 mm (5.0 inches) |
| Focal Length | 952 mm |
| Focal Ratio | f/7.5 |
| Optical Coatings | Enhanced Multi-Lens Coating Matrix (EMC) |
| Glass Material | Hoya FCD1 Extra-Low Dispersion (ED) Glass Element Core |
| Secondary Mirror Obstruction | 0 mm (None) |
| Secondary Mirror Obstruction by Diameter | 0% |
| Secondary Mirror Obstruction by Area | 0% |
| Resolving Power | 0.91 Arcseconds (Dawes), 1.09 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 13.0 |
| Highest Useful Magnification | 250x |
| Lowest Useful Magnification | 18x |
| Optical Tube Material | Powder-Coated Machined Aluminum Barrel Structure |
| Focuser Style & Mechanism | 2.0-inch Rack and Pinion Focuser with 10:1 Dual-Speed Gear Reduction Assembly |
| Mirror Lock Mechanism | No |
| Optical Tube Dimensions | 130 mm x 846 mm |
| Optical Tube Weight | 8.16 kg (18.0 lbs) |
| Mount Attachment Type | Universal Vixen Style Dovetail Bar with Stainless Steel Rail Protection Profile |
| Finder Scope Specification | Optional Accessory Slot Configuration |
| Included Accessories | 2.0-inch Dual-Speed Focuser, 2-inch Dielectric Diagonal (99% Reflectivity), Vixen Style Dovetail Plate, Cradle Rings with Handle, Retractable Dew Shield |
| Standard Warranty | 10-Year Extended Warranty (Requires Online Registration) |
| Application | High-resolution planetary mapping and fine double-star resolution, leveraging a rigid aluminum chassis and a true three-lens architecture to achieve excellent visual contrast boundaries. |




























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