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)

• 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!

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

• 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

Features

• German equatorial design, latitude range of 10° ~ 70°
• Ideal for both visual observation and astrophotography
• Low periodic error (< ± 10 arc seconds)
• Payload of 12.7 kg (28 lbs) with the mount-only weight of 4.5 kg (10 lbs)
• CNC machined and cast metal body
• Spring loaded gear system
• Large easy to use quick-lock gear clutches
• Stepper motor with low power consumption
• AccuAlign^TM calibrated polar scope
• Polar alignment routine for those who can’t see the Pole Star
• Go2Nova® 8409 controller with Advanced GOTONOVA® GOTO Technology
• Integrated ST-4 autoguiding port
• Built-in Wi-Fi
• USB port for firmware upgrade and computer control
• LiteRoc heavy-duty stainless steel tripod w/ vibration suppression pads (7.5kg)
• Die-cast metal tripod spreader with accessory tray
• Hard carrying case
• Optional 32-channel Global Positioning System (GPS)
• Optional iGuider^TM autoguiding system (#3360)

Features

• German equatorial mount with innovative features
• Idea for both visual observation and astrophotography
• Maximum payload of 45 lbs (20 kg) with the mount weight of only 17.5 lbs (7.9 kg)
• Easy to use quick-lock gear clutches
• Integrated iPolar^TM electronic polar finder
• Low periodic error (< ± 7 arc seconds)
• Permanent periodic error correction (PPEC)
• Precision stepper motor for precise GOTO and accurate tracking
• Go2Nova® 8407+ controller with Advanced GOTONOVA® GOTO Technology and built-in heater
• Integrated ST-4 autoguiding port
• 32-channel Global Positioning System (GPS)
• USB communication port
• Cable management system
• 6" Losmandy-D & Vixen dual dovetail saddle
• All metal, CNC machined with red/black anodized
• Optional WiFi for mount control via SmartPhone/Tablet/Computer
• All new LiteRoc 1.75" tripod with improved stability and leg locks
• NEW iOptron subsidized TheSky Imaging Edition

ZWO OIII 36mm Unmounted Filter

OIII, or doubly ionized oxygen, emits light in the blue/green, or teal portion of the spectrum near 500 nm. Planetary nebulae and supernova remnants emit most of their light in the OIII line.

ZWO H-a 36mm Unmounted Filter

Hydrogen-Alpha is the most dominant emission line in star-forming regions. H-Alpha light is created by atomic hydrogen, and is responsible for the red color seen in most nebulae.

ZWO SII 36mm Unmounted Filter

Sulfur is in the deep red of the spectrum near 672 nm. When combined with H-a and OIII, these three filters will produce images with colors that are reminiscent of those taken by the Hubble Space Telescope.

These ZWO 36mm filters are unmounted. ZWO narrowband filters are fine-optically polished to reach an accuracy of 1/4 wave. Their performance is further enhanced by multiple layers of anti-reflection coatings.

Application and Performance:

• High transmittance and smallest bandwidth to maximize contrast
• Steep spectral profile minimizes halos around bright stars
• A single substrate to eliminate internal reflections
• Narrowband Objects: OIII Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants
• Use in light polluted areas and dark sites
• Extends imaging time when the moon is up
• Antlia narrowband Pro filters can be used down to f/3 systems with minimal loss of signal
• All Antlia unmounted narrowband filters are edge blackened to eliminate internal reflections from stray light
• Superior optical reliability reduces post image processing
• This filter is only effective for deep sky objects that contain OIII emissions

Application and Performance:

• High transmittance and smallest bandwidth to maximize contrast
• Steep spectral profile minimizes halos around bright stars
• A single substrate to eliminate internal reflections
• Narrowband Objects: H-alpha Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants
• Use in light polluted areas and dark sites
• Extends imaging time when the moon is up
• Antlia narrowband Pro filters can be used down to f/3 systems with minimal loss of signal
• All Antlia unmounted narrowband filters are edge blackened to eliminate internal reflections from stray light
• Superior optical reliability reduces post image processing
• This filter is only effective for deep sky objects that contain H-alpha emissions
  
  

Application and Performance:

• High transmittance and smallest bandwidth to maximize contrast
• Steep spectral profile minimizes halos around bright stars
• A single substrate to eliminate internal reflections
• Narrowband Objects: SII Emission Nebulae, Planetary, Wolf-Rayet Nebulae and Supernova Remnants
• Use in light polluted areas and dark sites
• Extends imaging time when the moon is up
• Antlia narrowband Pro filters can be used down to f/3 systems with minimal loss of signal
• All Antlia unmounted narrowband filters are edge blackened to eliminate internal reflections from stray light
• Superior optical reliability reduces post image processing
• This filter is only effective for deep sky objects that contain SII emissions

Application and Performance:

1. Designed for monochrome CCD and CMOS cameras

2. Great imaging colors for celestial objects, galaxies, star clusters and nebulae

3. AR anti-reflection film design for secondary reflection and star halo reduction

4. R-Filter provides maximum transmission of H-alpha and S II emission

5. B/G overlap doubles the energy in the OIII line

6. Balanced RGB-design offer 1:1:1 exposure times for most telescope optical systems

7. All Antlia LRGB-V Pro filters are edge blackened to eliminate internal reflections from stray light

8. The substrate thickness of each of the four LRGB filers is maintained to tight tolerances

9. Not recommended for Solar observing and imaging

10. Not recommended for visual observation

• Keep your optics clean with the innovative LensPen
• Use the soft retractable brush for removing loose particles and dust
• Clean smudges, fingerprints, pollen, and other sticky substances from the optics with the special cleaning element
• No liquids are used...nothing to spill or dry out
• The LensPen is safe and easy-to-use.  Keep one handy for all your optics!

• Zoom from low to high power in an instant with this versatile eyepiece!
• Compatible with any telescope that accepts 1.25” eyepieces
• This fully multi-coated premium eyepiece zooms to any focal length between 8mm and 24mm - pick the best magnification for your subject

• 7x50
• Individual Focus
• Fully Multi-Coated for maximum resolution and high contrast views
• Waterproof and Fogproof with nitrogen purging for all weather protection
• Rubber covered for protection and a firm grip
• Illuminated Compass built-in for direction location
• Reticle built-in for determining distance and size of objects
• Calculator Dial for quick distance measurement
• Aluminum Body
• Olive Drab for Military / Camouflage color scheme
• Tripod adapter fitting for tripod mounting for increased stability
• Soft Carrying Case for protecting the binoculars

• Experience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces
• Aluminum optical tube with tube vents featuring an integrated 50-mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging
• Versatile design accommodates 3 focal ratios: native f/10, f/7 with the addition of a focal reducer, or ultra-fast f/2 imaging with a removable secondary mirror and third-party accessories
• Celestron’s premium StarBright XLT coatings provide maximum light transmission.
• A 9x50 finderscope, 2” mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2" eyepiece are all included

• Binoviewers improve views dramatically, producing a three dimensional effect that you’ll love!
• Using two eyes for observing instead of one lets you see more detail, reduces eye fatigue, and increases contrast
• For use with catadioptric telescopes and other telescopes with sufficient back focus
• Includes an aluminum carry case with foam-lined interior
• Requires a matching pair of 1.25” eyepieces, sold separately

• High quality 90mm Maksutov-Cassegrain
• Fully computerized Altazimuth mount
• StarPointer finderscope to help with alignment and accurately locating objects
• Quick-release fork arm mount, optical tube and accessory tray for quick no tool set up
• Sturdy stainless steel tripod and accessory tray included
• Perfect for terrestrial and celestial observing
• BONUS Starry Night Special Edition Astronomy Software download with a 36,000-object database, printable sky maps and enhanced images including 3D renderings of stars, exoplanets, and galaxies

• Wide field of view reveals a larger portion of the night sky, allowing you to view more of the comet's impressive tail
• Large 50 mm objective lenses have tremendous light-gathering ability, ideal for astronomical use
• Multi-coated optics dramatically increase light transmission for brighter images with increased contrast and resolution
• Large exit pupil provides maximum light during nighttime and low-light viewing sessions
• Strong and durable alumnium housing