Explore Scientific 127/952 Refractor ED Triplet Alu Essential

The Explore Scientific Apochromatic refractor AP 127/952 ED Alu Essential OTA is a powerful 127 mm triplet refractor that offers exceptional contrast and color correction - ideal for advanced observers and astrophotographers.

The optical design consists of three lenses with FCD-1 ED glass from Hoya (Japan) and two air blanks. This provides color error correction well above that of standard two-lens ED refractors. With a calculated polystrehl of >0.9 compared to the 0.8 of conventional models, this telescope offers razor-sharp, color-neutral images even at high magnifications. The solid aluminum tube and precise Crayford focuser with 1:10 fine adjustment ensure stable focusing and reliable support for heavier cameras.

Thanks to the tube length of 952 mm (f/7.5), this model optimally combines brightness and resolution. With a suitable field flattener (sold separately), you can also use the telescope excellently for astrophotography, with a completely flat field of view to the edges of the sensor. The OTA features tube rings, a dew cap and a standard T-profile accessory shoe for easy attachment of viewfinders or guide scopes.

The 127 mm aperture offers significantly higher light output than a 100 mm refractor, making this model suitable for observing both bright planets and fainter deep-sky objects such as the Orion Nebula or globular clusters. Explore Scientific's build quality ensures stability, precision and durability - exactly what you expect in the Essential Line.

Application:
This 127 mm apochromatic refractor is ideal for:

• detailed observation of the Moon and planets;
• sharp representation of nebulae and galaxies;
• astrophotography with DSLR or CMOS cameras;
• visual deep-sky observation with high contrast display.

Not suitable for solar observation without a special solar filter.
Suitable for advanced observers demanding high image quality in a robust OTA, with room for later expansion (mount, flattener, cameras).

Specifications

Optics
Type: Refractor
Design: Apochromat (triplet, FCD-1 ED glass)
Opening: 127 mm
Focal length: 952 mm
Aperture ratio: f/7.5
Resolution: 0.91″
Boundary magnitude: 12.3
Light output: 330× relative to the naked eye
Maximum magnification: 250×
Tube Material: Aluminum
Tube construction: full tube
Tube weight: 6.8 kg

Focuser
Type: Crayford with 1:10 fine adjustment
Ocular connection: 2″
Back focus: 165 mm

Mount
Type: OTA (without mount)
GoTo control: No

Included accessories

• Camera adapter (piggyback)
• Tube Rings
• Dew cap
• Accessory shoe (T-profile)
• Transport case

Observation goals
✓ Moon and planets
✓ Nebulae and galaxies
✓ Astrophotography
✓ Nature observation
✗ Sun (only with appropriate sunscreen)
✗ Beginners
✓ Advanced