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Sky-Watcher Pro 100ED APO Refractor S11120

Price: $769.00

Sky-Watcher is a leader in the design and manufacturer of ED-APO systems. Sky-Watcher offers one of the most extensive lines of ED-APOCHROMATIC refractors in the world. Using only the finest fabrication materials available, Sky-Watcher APO refractors are manufactured to painstakingly rigorous, exacting standards of optical and mechanical quality to insure the amateur astronomer peak performance.

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Main information about Sky-Watcher Pro 100ED APO Refractor S11120

SW PRO 100ED APO Refractor: When You Demand the Best!

Sky-Watcher is a leader in the design and manufacturer of ED-APO systems.  Sky-Watcher offers one of the most extensive lines of ED-APOCHROMATIC refractors in the world.  Using only the finest fabrication materials available, Sky-Watcher APO refractors are manufactured to painstakingly rigorous, exacting standards of optical and mechanical quality to insure the amateur astronomer peak performance and a great experience each and every time a Sky-Watcher ED-APO is taken into the field.  We know the amateur astronomer has very high expectations regarding astronomical equipment purchases.  Sky-Watcher has been delivering consistent satisfaction for decades.  This telescope is designed for a lifetime of astronomical enjoyment!

 

Observing with the Sky-Watcher PRO ED-APO 100mm Refractor

Turning the telescope to the first quarter Moon, the Apennine Mountains snap into focus revealing a cornucopia of jagged mountain ridges, canyons, and numerous small craters in razor-sharp detail.  Not far removed, reaching skyward the crater wall of Archimedes pops into view in bold relief against the smooth flatlands that transverse the distance between it and the Apennine Mountains.  This is lunar observing at its best – HD style.  The gas giant Jupiter displays its swirling equatorial bands in high-definition with festoons, and tonality within the bands.  The great spot is clearly visible, discreetly contrasted from the surrounding Jovian landscape.  Saturn’s storied surface phenomenon is simply stunning.  Hunt down double stars like Epsilon Lyrae, the “double-double" in Lyra.  A 100mm refractor will provide a crisp well defined image superior to even a larger reflector.  Always a star-party favorite, Alberio located in the tail of Cygnus never fails to please as it is a beautiful double.  Alberio appears like a gold sparkler and its companion looks blue-green.  It is a perfect refractor object.  Compact globular star clusters lend themselves well to a refractor. Located outside our galaxy the globular M2 will probably resolve more stars in a 4" refractor than a 6" reflector.  M4, M10 and many other globular cluster can be seen well with a 100mm refractor.  M13, the fantastic globular in Hercules is a stunning sight in a 100mm refractor.  The bright central cores of prominent nebulae can be seen and the brightest stars can be resolved.  This is just the beginning of an incredible journey of exploration possible with a SW ED-APO 100mm refractor.

As an astrograph, the SW PRO 120ED APO performs superbly delivering crisp, high-fidelity imaging of planetary, lunar and aperture appropriate deep-space phenomenon.

 

Refractors—the Ultimate Imaging Instruments

In a given aperture size, refractors will always exhibit sharper images than other optical designs because the refractor concentrates more light into the central airy-disk and first diffraction rings.  There is no diffraction pattern interference caused by a diagonal mirror, or secondary mirror being suspended in the optical path (central obstruction) as is the case with reflectors.

 

Sky-Watcher ED-APOs—the Ultimate Refractors

Sky-Watcher ED-APO refractors provide the finest images obtainable—bar none—in their design class.  If you are on a quest for the ultimate in pristine, near textbook-perfect astronomical imaging, look no further!  Sky-Watcher ED apochromatic refractors deliver dramatic coal-back skies and faithful, contrast-rich views of planetary and deep-space phenomenon that are second to none.  Sky-Watcher ED-APO refractors are the logical choice as an investment in advanced instrumentation for exceptional viewing or photography.

 

Virtually Eliminates Residual Chromatic Aberration

The Sky-Watcher ED-APO design assures virtual elimination of residual “false color" (i.e. chromatic aberration) normally present in 2-element achromatic lens designs which utilize standard crown and flint glasses.

Sky-Watcher APO refractors utilize the finest extra-low dispersion (ED) glass available, FPL-53. This results in the best color correction for an ED doublet lens.

 

Schott Glass Used in Selected Models for Crown Element

Select models of ED-APO refractors will benefit from the inclusion of Schott glass being used for the positive front Crown element in the objective.  Schott is the recognized world leader in glass utilized for precision optical lens systems, including medical instrumentation, and famous-brand camera lenses.  While Schott glass is only used in selected models, all other models utilize top-quality, Grade-A glass from perhaps less famous but, nonetheless, highly respected, high-quality glass manufacturers.

 

Pride and Perfection in Optical Manufacturing

Every lens element is individually inspected for purity and absence of striae and other image-degrading imperfections.   Every lens is pitched polished to exacting standards of optical fabrication and performance by highly skilled opticians utilizing state-of-the-art methodology and rigidly controlled optical testing procedures.  The result is high-quality, diffraction-limited optics performing to the theoretical limits of their respective aperture sizes.  All lenses are uniformly air-spaced in their cell housings.

 

Metallic High-Transmission Lens Coatings 

Each air-to-glass lens surface has exotic anti-reflection metallic coatings applied to ensure optimum light through-put.  The proprietary Sky-Watcher “Metallic High-Transmission Coatings" (MHC) are the finest photon anti-rejection coatings in their class.

 

Light-Baffled Optical Systems

The objective lens cell is light-baffled to reject stray, unfocused light.  The draw tube is likewise baffled to insure optimum contrast.  The tube interior is flat blackened to help prevent unfocused internal light reflections from reaching the focal plane. 

 

Precision 2" Crayford-style Focuser is Standard
Optical focus is achieved by means of a mechanically ultra-smooth, backlash-free, precision 2" Crayford-style focuser-assembly with 1.25 adaptor.  This focuser operates at 2 speeds for fine and ultra-fine focusing adjustments. 

 

Tube Materials

The optical tube material is aluminum, powder-coated reflective gloss black with gold fleck accent. The front and back cells are cast-aluminum painted white, or black. 

 

Telescope Tube Attachment Hardware:

The Sky-Watcher APO optical tubes come with attachment hardware that allows them to be securely fastened to the SW EQ5P mount.  The quick-release tube rings provided with SW ED-APO models 80ED 100ED and 120ED are cast-aluminum, painted white

 

Included Components for Selected Models

SW PRO ED-APO models are also supplied with a RA 8x50mm viewfinder with bracket; 2" dielectric diagonal; two 1.25" LE (Long Eye Relief) eyepieces (LE20mm and LE5mm); 1.25" focuser adaptor; and tube ring attachment hardware for mounting to the Sky-Watcher EQ5PRO Mount (or other compatible mount), and a foam lined aluminum carry/ storage case for optical tube and accessories is included.

 

Specifications:

Optical Design

Refractor

Aperture (mm)

100 mm (3.94 in)

Focal Length (mm)

900 mm (35 in)

Focal Ratio

9

Eyepiece 1 (mm)

20 mm (0.79 in)

Magnification 1

45 x

Eyepiece 2 (mm)

5 mm (0.2 in)

Magnification 2

180 x

Finderscope

8x50 RA Viewfinder

Highest Useful Magnification

236 x

Lowest Useful Magnification

14 x

Limiting Stellar Magnitude

12.5

Resolution (Rayleigh)

1.39 arc seconds

Resolution (Dawes)

1.16 arc seconds

Light Gathering Power (Compared to human eye)

204 x

Optical Tube Length

36.2204724 in (920 mm)

Optical Tube Weight

10 lbs (4.54 kg)

 

SKY-WATCHER USA TWO YEAR LIMITED WARRANTY

A. Sky-Watcher USA warrants your telescope to be free from defects in materials and workmanship for two years. Sky-Watcher USA will repair or replace such product or part thereof which, upon inspection by Sky-Watcher USA, is found to be defective in materials or workmanship. As a condition to the obligation of Sky-Watcher USA to repair or replace such product, the product must be returned to Sky-Watcher USA together with proof-of-purchase satisfactory to Sky-Watcher USA.

B. The Proper Return Authorization Number must be obtained from Sky-Watcher USA in advance of return. Call Sky-Watcher USA at (310) 803-5953 to receive the number to be displayed on the outside of your shipping container.

All returns must be accompanied by a written statement setting forth the name, address, and daytime telephone number of the owner, together with a brief description of any claimed defects. Parts or product for which replacement is made shall become the property of Sky-Watcher USA. The customer shall be responsible for all costs of transportation and insurance, both to and from the factory of Sky-Watcher USA, and shall be required to prepay such costs.

Sky-Watcher USA shall use reasonable efforts to repair or replace any telescope covered by this warranty within thirty days of receipt. In the event repair or replacement shall require more than thirty days, Sky-Watcher USA shall notify the customer accordingly. Sky-Watcher USA reserves the right to replace any product which has been discontinued from its product line with a new product of comparable value and function. This warranty shall be void and of no force of effect in the event a covered product has been modified in design or function, or subjected to abuse, misuse, mishandling or unauthorized repair. Further, product malfunction or deterioration due to normal wear is not covered by this warranty.

SKY-WATCHER USA DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE, EXCEPT AS EXPRESSLY SET FORTH HEREIN. THE SOLE OBLIGATION OF SKY-WATCHER USA UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT, IN ACCORDANCE WITH THE TERMS SET FORTH HEREIN. SKY-WATCHER USA EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO USE ANY SKY-WATCHER USA PRODUCT. ANY WARRANTIES WHICH ARE IMPLIED AND WHICH CANNOT BE DISCLAIMED SHALL BE LIMITED IN DURATION TO A TERM OF TWO YEARS FROM THE DATE OF ORIGINAL RETAIL PURCHASE.

Some states do not allow the exclusion or limitation of incidental or consequential damages or limitation on how long an implied warranty lasts, so the above limitations and exclusions may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Sky-Watcher USA reserves the right to modify or discontinue, without prior notice to you, any model or style telescop

If warranty problems arise, or if you need assistance in using your telescope contact:

Sky-Watcher USA

Customer Service Department

475 Alaska Avenue

Torrance, CA 90503

Tel. (310) 803-5953

Toll-free (855) 327-1587

Monday-Friday 8AM-4:30PM CST

NOTE: This warranty is valid to U.S.A. customers who have purchased this product from an authorized Sky-Watcher USA dealer in the U.S.A.

Product's SKU: S11120

Product's UPC: 050234111201

Sky-Watcher Pro 100ED APO Refractor S11120

Manufacturer details

David Shen, the founder of Sky-Watcher, started pursuing his interest in optics design and star observing when he was 26, working as a polishing technician at a research institute in Taiwan. It was a lovely summer night after work that the bright stars urged David to observe them with a telescope. After placing the telescope on top of the hood of his car, the view of the magnificent rings from the Saturn planet greatly moved David. That night was deeply engraved in David's memory since and constantly inspires him to live his dream: "Building High-quality and Affordable Telescopes for Everyone".

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