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William Optics ZenithStar 61 mm f/5.9 APO Doublet Refractor Telescope - Gold Edition - A-Z61GD

SKU: WYO-A-Z61GD

Product is backordered from the manufacturer. Once the order is placed our team will update you on the anticipated arrival date.

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William Optics ZenithStar 61 mm APO Refractor - Gold




The ZenithStar 61 provides more portability and utility than any telescope ever offered by William Optics. Produces excellent sharp images for astrophotography or wildlife photography when working in conjunction with any DSLR. Useful in high power both visually and, with a large image circle, for lunar photography when paired with a separately available dedicated Field Flattener 61. The ZenithStar 61 is a great instrument you'll be able to appreciate for several years to come!



The objective lens uses FPL-53 glass which is a significant improvement over the older FPL-51 ED glass. ED and SD glass dispersion properties are critical to ascertain the general color correction. The abbe index is the number used to quantify the "partial dispersion" of a specific glass. FPL-53 glass features a partial dispersion that is so close to pure fluorite, which has the highest partial dispersion of any material at around 95 V, that it has been referred to as synthetic fluorite.



The most expensive glass material currently available, FPL-53 is top-of-the-line glass that allows William Optics designers to realize the finest color correction.



When you purchase a telescope from William Optics, you can be assured that your instrument was tested on their Interferometer. Furthermore, each telescope is individually star tested by William Optics professionals to guarantee the ultimate in optical quality.

Description
Description

William Optics ZenithStar 61 mm APO Refractor - Gold


The ZenithStar 61 provides more portability and utility than any telescope ever offered by William Optics. Produces excellent sharp images for astrophotography or wildlife photography when working in conjunction with any DSLR. Useful in high power both visually and, with a large image circle, for lunar photography when paired with a separately available dedicated Field Flattener 61. The ZenithStar 61 is a great instrument you'll be able to appreciate for several years to come!

The objective lens uses FPL-53 glass which is a significant improvement over the older FPL-51 ED glass. ED and SD glass dispersion properties are critical to ascertain the general color correction. The abbe index is the number used to quantify the "partial dispersion" of a specific glass. FPL-53 glass features a partial dispersion that is so close to pure fluorite, which has the highest partial dispersion of any material at around 95 V, that it has been referred to as synthetic fluorite.

The most expensive glass material currently available, FPL-53 is top-of-the-line glass that allows William Optics designers to realize the finest color correction.

When you purchase a telescope from William Optics, you can be assured that your instrument was tested on their Interferometer. Furthermore, each telescope is individually star tested by William Optics professionals to guarantee the ultimate in optical quality.

Specifications
Specifications
Model Number A-Z61GD
Telescope Series William Optics ZenithStar
Telescope Mount Type No Mount - OTA Only
Telescope Optical Design Refractor
Aperture 2.4" (61 mm)
Telescope Focal Ratio f/5.9
Focal Length (mm) 360
Optical Coatings Fully multi-coated, SMC coatings
Image Circle Z61 Φ 41 mm / Z61 with Flat 61 Φ 43 mm
Limiting Stellar Magnitude 10
Diagonal Included? No, but Recommended
Telescope Eyepiece(s) Included? No, Sold Separately
Finder Included? No, Sold Separately
Focuser Style Rack & Pinion
Focuser Size 2"
Focuser Speed Dual Speed
Refractor OTA Length - Extended (in.) 11.8
Refractor OTA Length - Retracted (in.) 9
Telescope OTA Weight (lb.) 3.2
Tripod Height Range (in.) N/A
Warranty Two (2) Years
What's in the Box?
What's in the Box?
  • William Optics ZenithStar 61 mm f/5.9 APO Doublet Refractor Telescope OTA - Gold Version
  • 2" Dual-Speed Rack & Pinion Focuser
  • 1.25" Compression Ring Adapter
  • Rotatable L-Photo Tripod Bracket
  • Aluminum Knob
  • Retractable Lens Shade
Files
Files
  • William Optics ZenithStar 61 APO Doublet Refractor OTA
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