SKU: 50591145985

William Optics Apochromatic refractor AP 61/360 ZenithStar ZS61 II OTA

Sale price$292.05 Regular price$324.50
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Description

William Optics Apochromatic refractor AP 61/360 ZenithStar ZS61 II OTADescription The Zenithstar range is the most versatile and portable scope ever made by William Optics. The ZS61 II APO features an air spaced doublet lens with fully multi coated optics and an Ohara FPL 53 ED glass element for sharp, high contrast images virtually free of false colour. It provides high resolution images when used for astrophotography or wildlife photography and is a convenient ultra portable telescope for visual astronomy. The fast f

Description

The Zenithstar range is the most versatile and portable scope ever made by William Optics. The ZS61 II APO features an air-spaced doublet lens with fully multi-coated optics and an Ohara FPL-53 ED glass element for sharp, high contrast images virtually free of false-colour. 

It provides high resolution images when used for astrophotography or wildlife photography and is a convenient ultra-portable telescope for visual astronomy.

The fast f/5.9 focal ratio and compact size make it ideal for convenient wide field astrophotography or piggybacking. These telescopes can be used for high power visual work, as well as lunar and solar photography thanks to the dedicated Flattener 61. It is truly a great piece of optical engineering.

Convenient rotatable L mounting bracket for easy framing of target. 

CNC machined aluminium for a superior fit and finish. 

Dual speed 2" 1:10 R&P focuser.

Available in Red, Gold or Space Grey anodised.  

Specifications

Optics

Type  Refractor
lens design Doublet 
Tube weight (kg)  2,2
Resolving capacity  1,89
Type of build  Apochromat 
Focal length (mm)  360
Limit value (mag)  10,7
Light gathering capacity  80
Max. useful magnification  122
Aperture (mm)  61
Aperture ratio (f/)  5,9
Tube material  Aluminium
Tube length (mm)  315
Carrying length (mm) 245
Tube construction Full tube
Fully Corrected Field (mm)  43
Coating SMC multi-coating

Focuser

Gear reduction 1:10 Fine movement
Adjustment range (mm) 75
Type of build Gear rack
Free aperture (mm) 51
Connecting threaded socket (camera-side) M48
Connection ( to eyepiece)  2"

Mount

Mounting type  no mount
Type of build  OTA 

Included accessories

Dew Shield yes
Corrector  without
Tube clamps yes
Prism rail Arca-Swiss & Vixen-Style
Finder scope  no
Deviating optics  no
Eyepiece adaptor 1,25" - 2"
Carrying case no
Thread for camera tripod 1/4" & 3/8"
Carrying bag yes

General

Series ZenithStar 
Colour red, silver or gold

Area of application

Astrophotography highly recommended
Nature Observation yes

Recommended for

Beginners no
Advanced  yes
Observatories  no
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 50591145985

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Danyel Myers
Boise, US
★★★★★ 5
Nice fit
Color: Blue Green, Size: Small, Color: Blue Green, Size: Small
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Reviewed in the United States on May 2, 2026
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patrick
Chelsea, US
★★★★★ 5
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Color: Dark Green, Size: Large
He looks like a very nice quality. Just the color did not match his girlfriend's dress.So we are going with an all black one
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Reviewed in the United States on April 27, 2026
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Janielle Rencher
New York, US
★★★★★ 5
Buy it!
Color: Blue Green, Size: Medium, Color: Blue Green, Size: Medium
Bought this as my nephew’s graduation suit and it fit perfectly. Great quality and the color was exactly like the photos. He wore a size medium
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Reviewed in the United States on May 30, 2026
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Alesia
Draper, US
★★★★★ 4
Nice but a different shade of purple than shown
Color: Light Purple, Size: Large, Color: Light Purple, Size: Large
Nice tux but not the color shown. It’s a really hard color to match. It’s more of a magenta-purplish-orchid color. Lolz we made it work, but just not the color intended
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Reviewed in the United States on March 29, 2026
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Karen Freeman
Dallas, US
★★★★★ 5
Love them!
Color: Light Purple, Size: X-Large, Color: Light Purple, Size: X-Large
These looked awesome at the wedding my husband was a part of!!
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Reviewed in the United States on May 29, 2026

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