Gran Turismo 81 , f/5.9 OTA. FPL53 three-element APO, 2.5” R&P Focuser in Red

• GT81 APO
• 2" & 1.25" Adapter Included
• Bahtinov Mask Included
• STM Multi-Coated Lenses
• f/5.9
• This is the Red version

Optical Performance

The Gran Turismo 81 is a Three Element Designed APO refractor. Using FPL-53 glass this telescope provides excellent aberration correction.

Details and Features

2.5" R&P Focuser

The 2.5" R&P Focuser is smooth, stable, and reliable! No image shifting!

New Designed Rotator

William Optics designed camera angle rotator. Smooth and stable.

CNC Handle Bar

Made by CNC with anodizing. Strong and nice look!

Bahtinov Mask

World first built in clear Bahtinov mask!

William Optics RedCat 51 Gen 2 f/4.9 APO Refractor Telescope - L-RC51II

• The ultimate portable astrophotography telescope with Bahtinov mask built into the cap for quick and easy focusing.

• 43 mm image circle is perfect for full-frame cameras in this 51 mm aperture petzval refractor. 
• The f/4.9 focal ratio allows for fast light-gathering power on this wide-field telescope.
• Includes the Iconic Soft Cat Carry Case.

William Optics UniGuide 50mm Slide-Base Guide Scope with 1.25" RotoLock - Gold - M-G50PB-WG

• Get in perfect focus with this high-quality William Optics Guide Scope.
• 1.25-inch RotoLock design for smooth and accurate focusing.
• This is the Gold version.

• Focal Length: 200 mm (7.87")

• Focal Ratio: f/4

• Diameter: 50 mm

• Total Guide Scope Length: 265 mm

• Included: 1.25" RotoLock

• Focusing: Front Focuser System w. Focus Lock Ring

• Weight: 515g (1.14 lb)

William Optics UniGuide 50mm Slide-Base Guide Scope with 1.25" RotoLock - Space Gray - M-G50PB-WG

• Get in perfect focus with this high-quality William Optics Guide Scope.
• 1.25-inch RotoLock design for smooth and accurate focusing.
• This is the Space Gray version.

• Focal Length: 200 mm (7.87")

• Focal Ratio: f/4

• Diameter: 50 mm

• Total Guide Scope Length: 265 mm

• Included: 1.25" RotoLock

• Focusing: Front Focuser System w. Focus Lock Ring

• Weight: 515g (1.14 lb)

William Optics ZenithStar 61II Doublet Refracting Telescope - Gold

Features

• 61 mm (2.41-inch) Aperture.
• f/5.9 Focal Ratio.
• 3.2 lb - Travel Telescope for Astrophotography and Wildlife Photography.
• Adaptable with any DSLR.
• This is the Gold Version
• Innovative Bahtinov Mask Cover for Easy Focus Assist.
• Soft Carry Case Included!

• The full-frame sensor size is approximately 36X24.
• A 41 mm diameter image circle.
• The Focuser is 50.8 mm (2-inch), rack and pinion, with 10:1 dual-speed micro focuser and a 75 mm travel length. 
• A rotatable L mounting bracket.
• The tube length has a range of 230 mm when fully retracted, and 300 mm when fully extended.

William Optics ZenithStar 61II Doublet Refracting Telescope - Gray

Features

• 61 mm (2.41-inch) Aperture.
• f/5.9 Focal Ratio.
• 3.2 lb - Travel Telescope for Astrophotography and Wildlife Photography.
• Adaptable with any DSLR.
• This is the Gray Version
• Innovative Bahtinov Mask Cover for Easy Focus Assist.
• Soft Carry Case Included!

• The full-frame sensor size is approximately 36X24.
• A 41 mm diameter image circle.
• The Focuser is 50.8 mm (2-inch), rack and pinion, with 10:1 dual-speed micro focuser and a 75 mm travel length. 
• A rotatable L mounting bracket.
• The tube length has a range of 230 mm when fully retracted, and 300 mm when fully extended.

William Optics All New Slide-base UniGuide 32mm Scope - Gold

The 32 mm UniGuide guide scope from William Optics has a focal length of 120 mm and a focal ratio of f/3.75. The guide scope comes with a Vixen-style slide-base. This base is compatible with the William Optics saddle carry handle and the Cat Handle bar (neither handles are included).

The back of the William Optics 32mm UniGuide scope comes with an M42 thread for attaching 1.25" cylindrical-type guide cameras such as QHY, SBIG, and ZWO cameras. Tightening knobs will ensure a stable fit for the attached guiding equipment.

The WO UniGuide guide scope has a full length of 147 mm. Of that length, the lens to the back of the guide scope is 105 mm. The Vixen slide-base measures 73 mm in length. When it comes to the 32 mm UniGuide Scope's appearance, the beautiful red exterior matches perfectly with other red William Optics refractors and accessories.

Additionally, the body of the guide scope comes with an adjustable distance of up to 25 mm. The design of the body even has a subtle focus mechanism! In order to focus the guide scope, you will need to twist the built-in dew shield. Once you have your desired focus, then you can lock it in with the black ring at the base of the dew-shield.

William Optics All New Slide-base UniGuide 32mm Scope - Space Grey

The 32 mm UniGuide guide scope from William Optics has a focal length of 120 mm and a focal ratio of f/3.75. The guide scope comes with a Vixen-style slide-base. This base is compatible with the William Optics saddle carry handle and the Cat Handle bar (neither handles are included).

The back of the William Optics 32mm UniGuide scope comes with an M42 thread for attaching 1.25" cylindrical-type guide cameras such as QHY, SBIG, and ZWO cameras. Tightening knobs will ensure a stable fit for the attached guiding equipment.

The WO UniGuide guide scope has a full length of 147 mm. Of that length, the lens to the back of the guide scope is 105 mm. The Vixen slide-base measures 73 mm in length. When it comes to the 32 mm UniGuide Scope's appearance, the beautiful red exterior matches perfectly with other red William Optics refractors and accessories.

Additionally, the body of the guide scope comes with an adjustable distance of up to 25 mm. The design of the body even has a subtle focus mechanism! In order to focus the guide scope, you will need to twist the built-in dew shield. Once you have your desired focus, then you can lock it in with the black ring at the base of the dew-shield.

New Adjustable Flat61 for Z61

Obtaining the best image when taking photographs of the night sky can be a tricky task. There are fantastic telescopes that make this task a little easier, and William Optics has provided a way to take this aid one step further. This William Optics Flat61 Field Flattener is specifically made for the Zenithstar 61 telescopes. They provide a flat field, an image circle of 43mm, for those who wish to participate in astrophotography.

The Flat61 threads onto the M54 Thread on the focuser of the Zenithstar 61 and has a M48 thread on the camera side.

Please Note: In order to attach a specific DSLR camera to the the field flattener, a camera specific M48 T Mount is required. These are sold separately.

Specifications

• Back Focus: 55mm

• Maximum Spacing: 12.9mm

• Camera Side Connection: Male M48

• Weight: 0.27kg (0.59lbs)

Astrodon 5nm H-alpha Filter is the perfect tool for your imaging set up in order to knockout Hydrogen gas and pick up faint details

Astrodon HA5_36R H-Alpha Narrowband Filter for Astrophotography

♦ 36mm Narrowband Filter - unmounted

♦ Emission line: H-Alpha 5nm bandwidth

♦ Thickness: 3mm - parfokal with all other Astrodon filters

♦ Transmission: better than 90%

• 71mm f/4.9 Astrograph
• 350mm Focal Length
• FPL-53 glass for color-free apochromatic performance
• 4 elements in 3 groups (2-1-1- configuration; new, unique, patented design - not a conventional objective/flattener/reducer design)
• Covers 45mm full-frame imaging circle
• Precise helical focusing and camera rotation; includes a 48mm make thread that accepts a wide T-ring.
• Includes mounting rings, 21cm long Red Vixen style dovetail and Cat saddle
• Weight = 6.2lbs / 2.8kg (OTA only); 8.2lbs / 3.7kg (OTA with ring, dovetail and saddle)

ZWO ASI120MC-S 1.2 Megapixel USB3.0 Color Astronomy Camera for Astrophotography

ASI120S is a super speed and sensitive USB 3.0 camera. Up to 60FPS under 1280X960 full resolution!

• Make a filter on your own for any telescope / binoculars / camera, and for a fraction of what factory made filters cost.
• The sun will appear in a natural orange color when viewed through your telescope using this filter.
• WARNING: ALWAYS MAKE SURE THE FILTER IS WELL ATTACHED TO THE TELESCOPE/BINOCULARS, USING STICKY TAPE, TO KEEP IT FROM FALLING WHILE OBSERVING!
• Silver - black polymer is the most common filtering material for observing sunspots and granulation, through telescopes and binoculars.

ZWO Electronic 8 Position Filter Wheel - 1.25"/31 mm Sized

• A lightweight and low-profile filter wheel.
• Holds 1.25-inch mounted or 31 mm unmounted filters.
• Necessary for deep-sky imaging.

(سلسلة العقول الذكية كتاب كيف تعمل الأشياء (علم الفلك للمبتدئين

The Small Off-Axis Guider by QHY has 35 mm to the center point. It is a thin and solid design only being 10 mm thick. Adding an M42 thread adapter ring will add 3 mm for a total thickness of 13 mm. There are six 3 mm through holes in the OAG for direct connection to the QH-QHYCFW2 and QHY A-series camera.

The prism position can be adjusted and can be locked down to fix its position. The prism is 8 mm x 8 mm size and the aperture between the prism and mirror is 8 mm in diameter. The QH-QHYOAG has a multi-thread 1.25-inch focuser build in which has a locking thumbscrew to hold the guide camera after focusing.

QHY5L-II-M CMOS Planetary Monochrome Camera - QHY5L-II-M

Do you want to get started in astrophotography and are you searching for a color camera simple to use, compact, cheap but with high quality to photograph the planets and the Moon? The QHY5L-II color is the perfect camera for you. The sensor has a very good 1280 x 960 pixels resolution, allowing you to record, with the EZPlanetary software, excellent high-resolution images.

Although less sensitive than the same camera with monochrome sensor, the QHY5L-II color can also be used as a autoguider thanks to the integrated ST4 port and to the autoguide cable already provided in the package.

• Aptina One-third Inch MT9M034 CMOS Sensor.
• Pixel Array: 1280 x 960.
• Pixel size: 3.75 um.
• USB and ST4 interface.
• QE of 74%.
• Planetary, Solar and Deep-sky Imaging.

ZWO LRGB filter set designed for CCD/CMOS astrophotography.

Includes red, green and blue filters and a UV/IR-Cut 'L' filter.

Features: 

• Schott substrate material
• Thickness 1.1mm
• Fine-optically polished to achieve 1/4 wavefront surface finish
• 90% transmission at passband
• Infrared wavelength 700-1100nm cut-off
• Precision off-band blocking
• Multi-layer anti-reflection coating

• Excellent for planetary and deep-sky astrophotography
• Supports ASCOM and various ASCOM-compatible 3rd party software
• Step Motor, 7.5-degree step angle
• Load Capacity of up to 5 kg

• Lightweight design with 50 kg (110 lb) load capacity
• Easy to carry and transport inside your luggage
• Compatible with other mounts such as: iOptron GEM45 and GEM40, Rainbow Astro 135E, and Sky-Watcher AZ-GTi
• Tripod head plate offers three mounting points to match the AM5 head