SKYWATCHER ESPRIT 120ED PRO APO TRIPLET
Sky-Watcher
Apochromatic triplet
10 kg
SKYWATCHER ESPRIT 120ED PRO APO TRIPLET is backordered and will ship as soon as it is back in stock.
The Skywatcher Esprit 120ED PRO is an apochromatic triplet refractor that offers high performance for demanding astrophotographers. The objective lens features an element of extra-low dispersion glass (ED) that minimizes the chromatic aberration for the best colour correction.
The 3" linear power focuser is solid and backlash-free, with zero image shift. It operates at two speeds due to the 11:1 reduction mechanism for extra fine focusing adjustment, which is paramount for astrophotography and high resolution observations. The knobs have been redesigned to allow smooth and accurate usage, even with gloves. The integrated rotator makes framing targets quick and easy.
The objective lens is fully multi coated with Skywatcher's proprietary new "Metallic High-Transmission Coating" (MHC) for an effective anti-reflection result that approaches a transmission of 99.5%. The aluminium tube has knife-edge baffles and is blackened to ensure high contrast and absorbing stray light.
The Esprit 120ED includes a two element field flattener, correcting the frame for field curvature and providing a 40mm imaging circle, making it suitable for large sensors.
Specifications
| Optical design |
Apochromatic ED triplet |
|
Objective diameter |
120 mm |
|
Focal length |
840 mm |
|
Focal ratio |
f/7 |
|
Resolving power |
1.00 arc second |
|
Stellar limiting magnitude |
12.4 |
|
Max. magnification |
240 x |
|
Light gathering power |
294 times the human eye |
|
Mount attachment |
Losmandy-style dovetail |
|
Focuser |
3" linear power dual speed (11:1) |
|
Tube weight |
10 kg |
|
Tube length |
762 mm |
|
Tube diameter |
156 mm |
|
Dew shield diameter |
175 mm |
|
Visual back focus |
180 mm |
|
Flattener back focus |
75 mm from M62 x 1 thread, 55 mm with 20 mm adapter ring |
|
Threads on tube rings |
1/4"-20, 80 mm between outermost threads, 51 mm between middle threads approx. |
|
Distance between tube rings |
269.5 mm centre to centre approx. |
Items included
- Esprit 120ED with dual speed focuser
- 2" dielectric star diagonal (90°)
- Field flattener with M48 x 0.75 thread
- 9 x 50 right angled finder scope
- Canon EOS T-ring
- Vixen-style dovetail bar
- 2" to 1.25" eyepiece adapter
- Foam-lined aluminium carrying case
Downloads
 Instruction manual
|
Gallery
Customer Reviews
The Esprit 120ED is a beautifully built piece of equipment and comes with a flattener, and a robust case that should protect it forever.
Stars are round right across the field. Coupled with the Prima Luce Sesto Senso II electronic focuser (which I bought at the same time) the whole setup does its job effortlessly. Images so far show the promise of many more great nights to come.
Testar were able to answer all my questions about the 120ED and my proposed image train and (thanks, Jamie) attention to details I had not even pondered.
