Sky Watcher Esprit 120mm ED Triplet Apo Refractor OTA # S11420

Our Price: $3,199.00
Free shipping for this item in the Continental US Click here for more info

Continental US Customers:
All items we sell ship for free within the Continental US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.

US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.

International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.

Drop Shipped
Ships in 2-3 Business Days
Our Product ID: T-SW-S11420
Manufacturer SKU: S11420
Item Can Ship: To US Only
Sky Watcher Esprit 120mm ED Triplet APO Refractor OTA # S11420

More Views

  • Sky Watcher Esprit 120mm ED Triplet APO Refractor OTA # S11420
  • Sky Watcher Esprit 120mm ED Triplet APO Refractor OTA # S11420
  • Sky Watcher Esprit 120mm ED Triplet APO Refractor OTA # S11420
  • Sky Watcher Esprit 120mm ED Triplet APO Refractor OTA # S11420
  • Sky Watcher Esprit 120mm ED Triplet APO Refractor OTA # S11420
  • Sky Watcher Esprit 120mm ED Triplet APO Refractor OTA # S11420
  • Sky Watcher Esprit 120mm ED Triplet APO Refractor OTA # S11420

Quick Overview

  • 120 mm apochromatic 3-element refractor
  • 840 mm (f/7)
  • Fully multi-coated
  • Thread-on field flattener
  • 3.0" focuser with micro focus
  • 2" Diagonal with dielectric coatings
  • 9x50 RA erect-image finderscope
  • Canon camera adapter
  • Tube rings with CGE style dovetail bar
  • Aluminum foam lined case
  • 43mm image circle
  • OTA Weight: 22 lbs.
  • OTA Length: 31.5" Extended and 27.4" Retracted
  • Back focus: 75mm

Product Details

Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

With their three-element air spaced objective lens design, false color is completely eliminated, yielding exceptional contrast and sharpness. The included 2-element field corrector guarantees a flat field across the entire imaging plane. The Sky-Watcher exclusive Helinear Track focusing system provides a smooth, rock-solid focuser with zero image shift.

All Sky-Watcher USA Esprit refractors come with a 9 x 50 right angle finderscope, 2-inch Star diagonal, 2-element field flattener, camera adapter, D-style dovetail and padded case. Everything you need to get out under the stars.

Specifications: 

  • Optical Design: Refractor
  • Field Flattener: Included, thread-on
  • Aperture (mm): 120 mm (4.72 in)
  • Focal Length: 840 mm
  • Focal Ratio: 7
  • Finder Scope: 9x50, erect-image, right-angle
  • Diagonal: 2", dielectric coatings
  • Tube Rings: With 3" (CGE Style) dovetail plate
  • Highest Useful Magnification: 283 x
  • Lowest Useful Magnification: 17 x
  • Resolution (Rayleigh): 1.16 arc seconds
  • Resolution (Dawes): .97 arc seconds
  • Light Gathering Power (Compared to human eye): 294 x
  • Optical Coatings: Fully multi-coated
  • Fully Illuminated Field: 43 mm (1.69 in)
  • Optical Tube Length: 30 in (762 mm)
  • Optical Tube Weight: 23 lbs (10 kg)


 

Product carries full 2 year manufacturer factory limited warranty (within US only).

Manufacturer part number: S11420

Useful Resources

Manufacturer Sky Watcher
General Specs
Focuser 3.4" Dual Speed R&P
OTA Length 31.5"/27.4" (Retract/Ext.)
OTA Outer Diameter 6.875"
OTA Weight (with accessories) 22 lb
Optical Specs
Mirror Coatings N/A
Lens Coatings Fully Multi-Coated
Glass Type BK7 (2)/FPL-53(ED)
True Aperture (mm) 119.75
Primary Aperture (mm) 120
Primary Edge Thickness N/A
F/Ratio 7
Focal Length (mm) 840
Secondary Obstruction (by diameter) N/A
Secondary Obstruction by Area N/A
Included Accessories
Included Finder 8x50 RACI
Included Diagonal 2" Dialetric
Mounting Accessories Rings/D-Rail
Included Eyepieces None
Magnification w/ Included Eyepieces N/A
Included Case Yes
Corrector Yes
Observational Specs.
Dawes Limit 0.97
Rayleigh Limit 1.16
Limiting Mag. 12.9
Minimum Magnification 17
Maximum Magnification 236
Light Gathering (compared to next size down) 44%

Product Questions & Answers

No questions yet. Be the first to Ask a Question.