The William Optics Zenithstar 61 is a doublet apochromatic refractor telescope that excels in deep-sky DSLR astrophotography.  The Z61 is the most portable telescope ever made by William Optics, a company with a reputation for building beautiful astrophotography refractors.
The William Optics Zenithstar 61 is the most versatile and portable scope ever made by William Optics. Choose from blue, gold or red accents.

This 61mm refractor provides an excellent sharp image with any DSLR for Astrophotography or Wildlife photography. 

This compact refract can not only can be used in high power visually but also with a large image circle for lunar and solar photography, thanks to dedicated Flattener 61, it is a great instrument you can own and enjoy for a decade!
 
Synthetic Flourite for Superb Color Correction
The impressive optical quality of this apochromatic telescope is due to the FPL-53 glass used. FPL-53 is as close as you can get to pure fluorite, which means that your astrophotography images will display excellent color correction, with colorful, sharp stars. This glass is used in the objective lens and is known as Synthetic Flourite.
Once you get accustomed to astrophotography images of this quality, it is hard to switch from an ED refractor to other telescope designs.
 
FEATURES - Smooth and Accurate Focus
This telescope excels at wide-field, deep sky astrophotography with a DSLR. The buttery smooth dual speed locking focuser means that your images will be razor-sharp.  If you have ever struggled to find focus using a loose rack and pinions-style focuser, you will certainly appreciate the precision 1:10 speed micro focuser on the Z61.

Whether you use a Bahtinov mask to focus using Astro Photography Tool or Backyard EOS, or simply using the 10X Live View function of your DSLR, the precision focusing of the Z61 will ensure that your image is as sharp as possible.
 
Balanced and Secure
Because the Z61 is so compact and solid, balancing the scope is extremely easy to accomplish.  You won’t find a hint of wobbliness while imaging the night sky with the Z61.  The DSLR and telescope are a rock solid united as one – very similar to a high-end telephoto camera lens.
 
Fast Optics with a Wide Field of View
Thanks to its fast optics (F/5.9), this refractor collects a lot of light in a short period of time. Image exposures of 2-3 minutes at ISO 1600 are likely all you will need to capture deep details of your target.

If you have ever struggled with framing up a large target such as the North America Nebula or Andromeda Galaxy, the Z61 is a breath of fresh air. The ultra-wide 360mm focal length means collecting photons on HUGE areas of the night sky in a single frame.

Even with a crop sensor camera like my Canon T3i/600D, the focal length of 576mm is still more than wide enough for the big targets.
 
Highly portable and Lightweight
A high-quality refractor at this size is the perfect travel scope. When combined with a portable camera mount, you’ve got a very capable deep-sky imaging rig that can pack up into a backpack or travel container.

A collapsible carbon fiber tripod, the iOptron SkyGuider Pro, and the Z61 is probably the most portable deep sky astrophotography setup you can have.
 
Deep Sky Imaging with the Zenithstar 61 APO
If you are new to deep sky astrophotography but have dabbled in tracked night sky shots including the Milky Way – this is likely the best possible next step for you.
 
An Affordable Imaging Refractor
The William Optics Zenithstar 61 currently retails for Rupees 52500.00.  The price includes the telescope only, as you can add a number of extras to your order. This includes everything from a color-matched dovetail plate to the photo adapter for your DSLR camera.
 
SCOPE OF DELIVERY
Zenithstar 61 APO Telescope
Dovetail plate
Precision 1:10 Speed Micro Focuser
Built-in Bahtinov Mask
Dust Caps for front-lens and focuser
Soft Carry Case

TELESCOPE SPECIFICATION

TECHNICAL DATA
Focal Length	360 mm
Aperture	61 mm
Focal Ratio	F/5.9
Limiting Magnitude	10
Image Circle	Z61 Φ 41mm / Z61 with Flat 6 Φ 43mm
Objective Type	Synthetic Flourite FPL 53 Doublet, Air Spaced, APO Fully Multi-Coated, SMC coating.
Lens Shade	Retractable
Field Stops	Baffles
Type of mount	Rotatable L Bracket
Camera Format	APS-C, Full Frame
Focuser	50.8mm(2”) R&P Focuser with 1:10 Dual Speed micro focuser 75 mm Focuser Travel Length
Image Circle	> Full Frame
Recommended Flattener	Flat 61A
Tube Length	230mm Fully Retracted 300mm Fully Extended
Tube Weight	1.45 kg
Diameters	Main Tube Diameter 75 mm / Dewshield Diameter 80mm
Interchangable T-Mount	Canon, Nikon, Sony E, Pentax, Fuji FX

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