About this product
Part Number: 10244
Es Reid Optical Bench Test
Following a number of requests we are offering an Es Reid optical bench test for Esprit telescopes.
Es Reid is highly regarded in the optical industry so if you purchase his optical bench test you can be confident your telescope will, from the outset, have well figured optics, negligible false colour and spherical aberration, and no astigmatism (the bane of any optical system!). Star shapes will be round, not triangular, oval or egg-shaped!
Because most Esprit telescopes test AOK out-of-the-box (only a small number require adjustment) this extra layer of quality control adds only £75 to the purchase price.
You know it makes sense :-)
A pre-dispatch optical bench test is now available for this telescope, for details see here.
Sky-Watcher Professional ESPRIT 3-Element ED apochromatic refractors offer optical performance rivalling or exceeding similar telescopes from even the most famous high-end brands.
Designed primarily for demanding astro-imagers wanting high-contrast images full of detail and zero detectable colour fringing, even on the brightest of objects!
An M48-fitting doublet field flattener is also available to flatten the field and minimise aberration and distortion. When used with the field flattener the Esprit-100's imaging circle is 40mm.
The M48 fitting provides a large clear aperture to reduce halation and a precision thread ensures the triplet and doublet lens groups are precisely aligned on the optical axis perpendicular to the image.
Price includes storage case
- Premium optical materials
- 3-Element Objective Lens, Focal Length 550mm (one Ohara FPL-53 ED element)
- Short focal length and full frame corrected focal plane
- Excellent field flatness across a 40mm imaging circle when used with the optically-matched flattener
- Precision linear power focuser
- Metallic high-transmission lens coatings
- Light-baffled optical systems
- Telescope tube attachment hardware
- Knife-edge Baffled Optical System
3” Dual Speed Linear Power Focuser
- 3” LPF with 2” and 1.25” eyepiece adaptors and indexed scale
- Zero focus-shift during focusing
- High Load Capacity
- New drawtube with steel sheet held by four large bearings makes focusing smoother than ever
- The smooth focus motion and 11:1 fine focus wheel allows precision adjustment and critical focusing of eyepieces & cameras
- Patent-pending design
Optical Design : Apochromatic Triplet with ED element
Diameter : 100mm
Focal Length : 550mm
F-ratio : f/5.5
Linear Power Focuser Diameter : 3"
Tube Weight : 6.3 kg
Tube Dimensions : 10.5 x 47 cm
Case Dimensions : 57 x 50 x 28 cm
What's in the box
- Esprit Telescope OTA
- Storage Cases
- 2” Dielectric Star Diagonal
- 9x50 Right-Angled Erect Image Finderscope
- Losmandy 'D' Style Dovetail Mounting Bar
- Tube Rings
|Average Rating (2 Reviews): |
Sunday, 18 November 2018 | David
I already had a Celestron Edge but wanted a traditional style scope too. When I bought this it was on good advice from FLO. I am only a beginner but like nice stuff. Lol. Excellent carry case for a start. I am happy to transport this anywhere in the case. The whole setup shouts quality and care. Superb finish, mechanics and glass. It was a good 2 weeks before I had a sky to try it and Oh man, I was impressed with the views. Seeing the Andromeda Galaxy for the first time was heart stopping. Lucky for me though it started again and I had an excellent evenings viewing. Jupiter looked like I could touch it. My Celestron AX mount didn't have the correct dovetail but I bought a Vixen dovetail and go an engineering company to drill and tap it correctly so it all fits. FLO were good with advice on these parts too.
A brilliant scope. Once I get a season of observation under my belt I can start using a camera with it.
Monday, 27 August 2018 | Nikolaos
Lets start with this , because actually is the first thing you observe .....Everybody knows that triplets needs to be handle with extra care.......
I was worried because i live in Athens - Greece , how DHL will handle the scope etc...
When the scope arrived and had the chance to open it , i never though that this kind of packaging exists !!!
You name it !!!!
Box in another box , filled with pallet style carton box , with foam legs , with small anti vibration balls around the scope !!!!!!!!and all this inside a heavy duty black suitcase !!!!!!!
Everything intact !!!!!!!!!
Thank you .
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