Opticstar ARC127 Refractor OTA

Achromatic refractor with high quality optics.

  • Aperture: 127mm
  • Focal Length: 1200mm (f/9.5)
  • Broadband Anti-reflection Multi-coated
  • Rack & Pinion focuser, 2-inch
  • Dewshield
  • Mounting rings & Vixen-style dovetail
  • 8x50mm Finderscope
  • 25mm Plossl eyepiece (1.25")
  • Star Diagonal (1.25")
  • UK warranty
Opticstar ARC127 Refractor OTA
  • Product code: A12L
  • Availability: In stock
  • Despatch: 2 business days
  • Retail Price: £ 295.00
Shipping rates
England & Wales
£ 10.00
Scotland Central & South
£ 10.00
Scotland North
£ 30.00
UK islands (from)
£ 40.00

Description

The Opticstar ARC-127 optical tube assembly is a 127mm aperture F/9.5 achromatic refractor with high quality optics that is ideal for planetary, Lunar and Solar observing with an appropriate Solar filter. Its relatively large aperture also makes it suitable for deep sky work to a degree.

Optical Design

The ARC-127 uses an objective consisting of two Low Dispersion (LD) Crown/Flint lenses, the lenses are broadband anti-reflection multi-coated for increased contrast and sharpness. The LD objective in conjunction with a long focal ratio restrains optical/chromatic aberrations in general and making the telescope well suited for high power work.


U.K. WARRANTY

INTERMEDIATE

VISUAL

ASTRONOMY
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Construction

A high-quality optical tube keeps the optics precisely aligned allowing for heavy optical equipment to be attached at the focuser end. The optical tube has been internally anti-reflection coated and greatly benefits from knife-edge baffles that prevent stray light from reaching the focal plane thus significantly increasing image contrast and sharpness. In addition, the optical tube assembly has a dew shield that also protects the lenses from condensation forming on the objective when the telescope is used in unfavourable conditions.

The telescope's 2-inch rack & pinion focuser draw tube has a printed millimetre scale to aid with focusing and repositioning, in addition the focuser has brass compression rings to better secure and not scratch accessories. It comes with a 1.25-inch eyepiece adapter so it will accommodate both 2-inch and 1.25-inch eyepieces and other accessories. The 1.25-inch adapter has a T-thread on its end that will enable the use of T-threaded accessories including DSLR cameras, filter-wheels etc.

A single–piece cradle with a carry-handle is used to lift and support the telescope on its mount. The telescope has a Vixen/Sky-Watcher type dovetail with a steel plate and will mount on most astronomical mounts. The carry-handle has been designed so as to enable the user to attach a DSLR, guide-scope or other accessories without the need of side-by-side platforms or similar, thus reducing costs, telescope total weight and the need for a heavier mount.

Opticstar ARC telescopes on equatorial mounts (mount not included with ARC optical tube assemblies).

Collimation

The ARC-127 comes collimated from the factory. If there was a need the objective could be collimated by an experienced user, three sets of easily accessible screws allow for precise collimation. Collimation can take place on a star under good atmospheric conditions or with the use of an artificial star.

Accessories

The ARC-127 comes with a 8x50mm finder scope and bracket. A 1.25-inch star diagonal and a 25mm Plossl eyepiece are also included. An optional 13% transparency Moon filter is recommended as is a 4mm-5mm eyepiece for high power viewing.

Carries full one year UK warranty.

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Opticstar ARC127 Refractor OTA
Attribute Specification
Opticstar Product Code / sku A12L
Universal Product Code (UPC) n/a
Warranty 1 year UK warranty
Series ARC
Experience Level Intermediate
Construction All metal construction
Clear Aperture 127mm
Focal Length 1200mm
Focal Ratio F/9.5
Optical Design Achromatic refractor
Optical Elements 2-elements
Optical Coatings Broadband anti-reflection multi-coated
Optical Tube Internally anti-reflection coated
Dew Shield Yes
Finderscope Saddle Yes
Finderscope 8x50mm with bracket
Focuser Type Rack & Pinion with lock, baffled for increased contrast
Focuser Drawtube 2-inch with 1.25-inch adapter (T-threaded for camera use)
Tube Rings Dual rings with carrying handle and dovetail platform
Eyepiece Plossl 25mm (1.25")
Magnification With bundled eyepiece:
  • w/25mm eyepiece x48.

With optional eyepieces:
  • w/9mm eyepiece x133;
  • w/6mm eyepiece x200;
  • w/9mm eyepiece and x2 barlow lens x266;
    (maximum practical magnification)
Star Diagonal 1.25"; 90°
Case No
Tube Weight 7.5 kg (including rings)
Tube Length 1240mm
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