Explore Scientific Apochromatic refractor AP 127/952 ED Alu Essential OTA (44857)

This apochromatic refractor is designed to excite any astrophotographer, offering premium features at a reasonable price.

Its optical system features a three-element construction made from high-quality FCD-1 ED glass by Hoya (Japan) and incorporates two air gaps. This design delivers a corrector that significantly outperforms the typical two-element ED apochromats found in this price range. With a calculated polystrehl value exceeding 0.9, it provides much sharper and clearer images compared to the 0.8 achievable with two-lens systems. Combined with its sturdy mechanical construction, this telescope offers an exceptional package that meets all expectations.

For photography purposes, an optional field flattener accessory is available, ensuring unrestricted use for astrophotography. Additionally, the tube length has been optimized to accommodate accessories requiring precise focal positioning.

Specifications

Optics

• Type: Refractor

• Build: Apochromat

• Aperture: 127 mm

• Focal Length: 952 mm

• Focal Ratio: f/7.5

• Resolving Capacity: 0.91 arcseconds

• Limit Magnitude: 12.3

• Light Gathering Power: 330x (compared to the human eye)

• Maximum Useful Magnification: 250x

Tube Characteristics

• Weight: 6.8 kg

• Material: Aluminium

• Construction: Full tube

Lens Design

• Type: Triplet

Focuser

• Build Type: Crayford

• Eyepiece Connection Size: 2 inches

• Gear Reduction: 1:10 fine focusing capability

• Backfocus Distance: 165 mm

Mount

• Type of Build: OTA (Optical Tube Assembly)

• Mounting Type: None included (requires separate mount)

• GoTo Control: Not included

Included Accessories

• Camera Adaptor: Yes

• Piggyback Mount: Yes

• Tube Clamps: Yes

• Dew Shield: Yes

Deviating Optics

• Star Diagonal: Not included

Finder Scope and Base

• Finder Scope: Not included

• Finder Base: Meade/Explore Scientific T-profile

Transport Cases: Included

General Information

• Series: Essential Line

Areas of Application

• Moon & Planets: Suitable for observation and imaging.

• Nebulae & Galaxies: Suitable for deep-sky imaging.

• Nature Observation: Suitable for terrestrial use.

• Astrophotography: Fully compatible with imaging setups.

• Sun Observation: Not suitable unless paired with an appropriate solar filter.

Recommended For

• Beginners: No (not ideal for first-time users).

• Advanced Users: Yes (perfect for experienced amateurs).

• Observatories: No (not designed for professional observatory use).