Skywatcher

9334046002195

The Skywatcher Esprit 120ED Triplet APO Refractor Telescope - OTA Only is a super-high quality refractor telescope made specifically for deep-sky observation and astrophotography. Its 840mm focal length gives it a wide field for viewing large objects such as nebulas and galaxies.   Features 120mm triplet APO OTA with multi-coated FPL-53 glass Field flattener and Canon DSLR adapter Dual-speed focuser with indexing 9x50mm right-angled finderscope 2" dielectric diagonal accepts 2" and 1.25" eyepieces Losmandy (D-style) dovetail Aluminium carry case   The air-spaced triplet objective lens for the telescope is made from Ohara FPL-53 ED (extra low dispersion) glass and tuned to remove all detectable traces of chromatic aberration. This means that for visual work, there is no (red or blue) colour fringing around the edge of the Moon or the brightest stars. For colour astrophotographers, this also removes blue fringing around target stars. Also for astrophotography, the bundle includes a matching 2-element field flattener. This will remove coma in the corners of the photography field. It also includes a 48mm T2 adapter for Canon DSLR cameras allowing the camera to be securely and squarely attached to the telescope. The objective is also fully multi-coated for maximum light transmission and minimum internal reflections. The Skywatcher Esprit 120ED triplet APO OTA is fitted with a CNC machined 11:1 dual speed focuser, which is rotatable to allow astrophotographers to frame their target as required. The focuser tube also has an index to allow you to return to the same position quickly. The heavy-duty focuser has racks on both sides of the barrel to avoid heavy cameras causing flexure in the imaging train. The telescope includes a 9x50mm right-angled finderscope to allow you to find your target easily, and has a 2" dielectric diagonal which accepts 2" eyepieces. An adapter for 1.25" eyepieces is also included. The telescope attaches to any mount that has a D-style dovetail. All this fits into an attractive aluminium foam-lined case.   Full Specifications Optical Tube Assembly (OTA) Optical Design Airspaced Apochromatic Triplet (APO) Glass Type FPL-53 extra low dispersion glass Aperture 120mm Focal Length 840mm Focal Ratio f/7.0 Included Eyepiece N/A Finderscope 9×50 Right Angled Erect Image Diagonal Star Diagonal 2″ Dielectric Star Diagonal Optical Tube Construction Aluminium Highest Useful Magnification 240x Limiting Stellar Magnitude 12.4 Light Gathering Power (Compared to Human Eye) 294x Diameter of the corrected field 40mm Focuser 3" Crayford Dual Speed with 2" and 1.25" adapter Visual Back Focus 225mm Resolving Power 1.00" Optical Coatings FMC Diffraction limited optics Optical Tube Length 762mm Optical Tube Weight 10.00kg Dovetail Vixen Dovetail Bar Warranty Skywatcher 5 Year Warranty   Recommended Accessories saxon 2X ED Barlow Lens 2-inch with 1.25-inch Adapter  Doubles the magnification of your telescope. Great for planetary viewing.  saxon NEQ6 Pro GOTO Mount with Steel Tripod The saxon NEQ6 Pro GOTO Mount with Steel Tripod is a compatible computerised telescope mount to carry this OTA.  M48 T-Thread Spacer Ring Kit Add a M48-T-Thread Spacer Ring Kit to adjust backfocus spacing as required. Comes with 7 convenient sizes.   About Sky-Watcher Contemporary telescope-making has advanced the simple optical designs early scopes to revolutionary, state of the art. The Sky-Watcher company believes Telescopes of quality make should no longer be expensive, but accessible to everyone. Sky-Watcher philosophy has always been to bring the vast wonders of the skies within reasonable reach of anyone with enough curiosity and courage to look up and imagine. Sky-Watcher scopes come in a large range of observational applications - from 10"Dobsonians to spotting scopes for land use.   Product Code: SKW-SWESPRIT120