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Figure 3 ZenithStar Z103 refractor telescopes in red, gold, and blue trim. Figure 1 A William Optics Gran Turismo (GT) 102mm refractor. Orion Nebula and the Lagoon Nebula.Star clusters: The William Optics refractor telescope is great for stable and sturdy mount and tripod are essential for a good viewing experience, as they can help reduce The William Optics RedCat series of telescopes uses a four-element Petzval lens system with high-quality synthetic fluorite FPL53 and FPL51 glass to achieve apochromatic performance over a wide and flat field, without the need for a field flattener or focal reducer. Table 3 Characteristics and compatibility of William Optics field flatteners/focal reducers. Bought to go with daystar quark & ZWO 174MM. The carry handle incorporates a finder-scope shoe which is very convenient- I have piggybacked my evoguide 50ED guidescope onto it very securely. For higher magnifications, you may want to consider using eyepieces with shorter focal lengths, such as 6mm or Image credit: William Optics. BEST FOR:- Astrophotography (with flattener reducer, sold separately)- Visual observation of deep sky and lunar/planetary (at longer focal lengths and larger apertures), LIMITATIONS:- Heavier and more expensive relative to doublet refractors, PRODUCT LINKS:William Optics Gran Turismo (GT) Triplet ED Refractors. For example, if you want to observe a specific deep-sky object, you can use My first views through the eyepiece really were very impressive. I did not wish to damage the finish on the gold dovetail bar so I attached it to an ADM saddle, fixed to an eleven-inch dovetail bar. telescope. pollution: Avoid observing from areas with high light pollution, as it can reduce the image quality.8. Barlow lens: Consider using a Barlow In the fall of 2018, I captured the Orion Nebula, and the Pleiades star cluster using the Zenithstar 73 and a full-frame DSLR. The CNC carry handle is particularly helpful and provides confidence that you wont drop the thing. procedures. With regular is level and pointed at a stable object. Image credit: Agena AstroProducts. The store will not work correctly in the case when cookies are disabled. $ 331.00 incl. Since 2008, Brian has taught astronomy to tens of thousands of stargazers through his websites OneMinuteAstronomer.com and CosmicPursuits.com. All New Adjustable Flat6AIII (T-mount not included), Camera Angle Rotator for 2.5 M63 Focuser, Super high precision COPPER T mount for Canon EOS full frame Cameras, Super high precision COPPER T mount for Nikon full frame Cameras, Slide-base 50mm Guiding Rings (with srews). telescopes.-QHY CCD cameras: QHY CCD cameras are also widely used by astrophotographers and offer good Here are the general steps to align your telescope: Set up your telescope on a level surface and make sure your mount is polar aligned.Find a bright star or The focal ratio of a telescope represents its light gathering ability, and the Z73 hits the sweet spot. This refracting APO telescope is useful in high power both visually and, with a large image circle, for lunar photography when paired with a dedicated Field Flattener . The 2.5" 10:1 rack & pinion focuser is smooth, stable and reliable, providing no slippage over long imaging sessions. Reproduction without permission prohibited. Gran Turismo Series Triplet Refractors, William Optics RedCat/SpaceCat 51mm Petzval refractors, William Optics ZenithStar Doublet ED Refractors, William Optics Gran Turismo (GT) Triplet ED Refractors, William Optics Fluorostar Triplet ED Refractors, William Optics UniGuide 50mm Guide Scopes, A Primer on T-Rings and T-Adapters for Astronomy and Astrophotography, Choosing the Best Telescope for Beginners 2023, Top Night Sky & Astronomy Events in August 2022, Top Night Sky & Astronomy Events in July 2022, Selecting a Baader Planetarium Star Diagonal, A Guide to Choosing Astronomy Eyepieces for Binoviewers, Choosing a Magnifying Finder Scope for Your Telescope, Apochromatic four-element objective lens in three groups with one FPL-53 glass element and one FPL-51 glass element to minimize chromatic aberration, Dual-spec reversible mounting base for Vixen-style astronomy mounts or an Arca-Swiss mount used in photography tripod heads, A helical focuser with engraved calibration markings and a tension adjustment to increase focusing drag or to lock the focuser in place; the focuser terminates in a male M48 thread for attaching a camera adapter or T-Ring, To help frame and orient images, the scope includes a field rotator that is laser etched and fully rotatable by 360 degrees to a precision of one degree, Just behind the field rotator is a slot to insert standard 2" astronomy filters with M48 threads, A tilt-adjustment mechanism on the rear to ensure that your camera sensor is squared with the optical axis, A focusing index on the lens body, similar to that found on camera lenses, A new mounting ring and longer dovetail rail. Moisture can damage the lenses or It provides high-resolution images when used for astrophotography or wildlife photography and is a convenient ultra-portable telescope for visual astronomy (think binocular astronomy targets). Make sure to remove any batteries from the mount to avoid battery leakage.By following these Figure 4 ZenithStar GT81 refractor telescopes in blue, red, and gold trim. The store will not work correctly in the case when cookies are disabled. About this product Model: wo_zs81_gd Part Number: A-Z81GD The NEW William Optics Zenithstar 81 APO features an air-spaced doublet lens with an Ohara FPL-53 ED glass element in a CNC machined ultra high precision lens cell with fully multi-coated optics for high resolution, high contrast images virtually free of false-colour. Thanks to its large visual field, the entire Moon or (with a filter) the Sun can be viewed at once. The William Optics branded soft carry case is a nice extra to complete the package and keep the telescope safe when not in use. This beautiful scope is everything you always wanted in a refractor, starting from extreme sharpness for clear details, and APO color correction. ensure optimal performance.-Avoid touching the lens or mirrors with your fingers as oils and residue can Of course, the telescope can always be rotated 180 degrees so its not a problem.The coarse and fine focus adjustments are very smooth and the focus lock does its job well. place as well. Although it is small, the 73mm objective is more than enough to gather impressive long-exposure deep-sky images. Worth getting for the Clarity on the Moon and Planets visually alone! Table 2 A comparison of the main mechanical features and accessories of William Optics telescopes from the RedCat (RC), ZenithStar (ZS), Gran Turismo (GT), Fluorostar (FLT), and Star (WS) series. Accessories 9. As low as $730.00. recommended to use eyepieces with a focal length between 8mm and 40mm. FLO awesome company, top customer service. The store will not work correctly in the case when cookies are disabled. High-quality & Affordable William Optics ZenithStar Telescopes for breathtaking images of our universe with 2yr warranty support. The WO had several good reviews, was light and had decent specs so I ordered it. My deep-sky astrophotography target for the night was the Cocoon Nebula in Cygnus. William Optics refractors feature metal tubes and trim, ED (extra-low dispersion) glass in the objectives, and premium focusers for holding cameras and astrophotography accessories. If you would like to see this telescope in action with a DSLR camera attached, have a look at the following video. Article and photos Agena AstroProducts, 2019. If you are looking for alternative options, be sure to see my list of 10 of the best astrophotography telescopes available, along with example images taken through each one. Hot. The William Optics ZenithStar 81 mm aperture Doublet APO Refactor is an extremely versatile telescope ideal for both astrophotography and general photography. Anyone in the market for a premium wide-field imaging refractor in a compact package will be hard-pressed to find a contender that can top the Zenithstar 73. with a soft brush or lens cloth to remove dust and debris.-Store it in a cool and dry place to avoid damage Not yet had the chance to test it however. Store in a cool place: Store the It Wide-angle eyepieces with AFOVs between 60-80 degrees are ideal Their premium diagonals include a Dura Bright coating for high reflectivity and a RotoLock collar to easily fasten the diagonal to the telescope. Sign up to get exclusive deals, observing tips, and new product announcements. The William Optics Zenithstar 73 APO has an f-ratio of F/5.9. It is quite heavy and my Star Adventurer just about manages. place: Store the telescope in a dry place to avoid damage from humidity. However, FLO clearly state this in the description so no points deducted. Skip to the beginning of the images gallery. Store the mount and tripod: If the telescope has a mount and tripod, store them in a dry and cool The FLT132 refractor requires the William Optics Flattener 8 field flattener/0.72x focal reducer for astrophotography with larger-sensor cameras. The built-in star-spikes Bahtinov mask makes focusing your DSLR camera through the telescope quick and easy. clouds in deep space. It can also reduce the impact of aberrations and 50mm F/4 Rotolock guiding scope ( Free Gift ) limited for first 10 sets only! taking long-exposure images of celestial objects, the Earth's rotation can cause the object to move across the Telescopes > William Optics > ZenithStar > William Optics Apochromatic refractor AP 73/430 Super ZenithStar 73 Gold OTA. This guide described and summarized the features and specifications of the telescope and accessories available from William Optics. eyepiece with a different focal length.Repeat these steps for other objects you want to observe.It may Before I review the Williams Optics Zenithstar 73 III APO telescope, I want to provide a brief overview of my experience in purchasing from FLO. accessory for telescopes that is used for astrophotography. 360 deg. Copyright 2003-2022 Agena AstroProducts. Both series of guide scopes have only 6.2mm of back-focus available, so they can only be used with 1.25" cylinder-type or "Mini" cameras from QHY, ZWO, SBIG, and so forth. Founded by William Yang in 1996, the company concentrates on making high-quality and affordable refracting telescopes with a distinctive design and a robust build. Astrophotography % SALE %. They are ideal instruments for newcomers to visual astronomy looking for a premium instrument. Chromatic aberration graphs are available on the WO website along with their specifications for apochromatic lenses including; optical component surface finish, anti reflection coating requirements and . The NEW William Optics Zenithstar 73 APO III 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. For the best experience on our site, be sure to turn on Javascript in your browser. Focusing with a DSLR camera on the Zenithstar 73 APO is quick and easy using the integrated Bahtinov mask. 2021 NEW Release: William Optics Zenithstar 73-III f/5.9 APO . I live on the Isle of Man so getting stuff here has always comes with delays. My next upgrade will be here towards a more substantial mount. high-resolution optics make it perfect for observing the planets of our solar system, including Jupiter, Saturn, showing basically the same detail as the 80mm but a bit sharper and near zero C.A..That FPL53 glass makes a difference, a new kind of Clarity compared at mid/ high powers and exit pupils! Mount: Use telescope's aperture, focal length, and your observing goals. Figure 10 William Optics 50mm UniGuide guide scopes. The build quality is excellent. I'm only new but & have limited skills but can see the image quality is superb. The William Optics Gran Turismo (GT) series uses apochromatic triplet objectives with an FPL-53 element to achieve a higher degree of color correction than the ZenithStar series. If this scope appeals to you, that package is at a bargain price. The finder includes a helical focuser that will bring several (but not all) 1.25" eyepieces to focus. To confirm this, I simply pop the diffraction spikes Bahtinov mask on the telescope between frames. William Optics organizes its telescope product line into named series of refractors, each with distinctive characteristics. Field Flatteners and Focal Reducers 8. The current lines of William Optics telescopes include: Table 1 A comparison of the main optical features of William Optics telescopes from the RedCat (RC), ZenithStar (ZS), Gran Turismo (GT), and Fluorostar (FLT) series. Weighing only about 3 lb, you can easily take it with you anywhere! Amazing quality, and an awesome scope. Here are the general steps to clean the lens of your telescope: Check the lens surface for any debris or dust. Use a dust cover or a soft cloth to cover the telescope and protect it from dust.2. Only slight grumble is that it didn't come with a finderscope shoe, but this has been ordered now so shouldn't wait too long. 3. Guidingscope: A guiding scope is an FPL-53 is also noticeably better than Ohara's lower spec' FPL-51 glass which offers an abbe index of 81.54 V. Seems like a top quality product. Shop William Optics telescope packages like this Red William Optics ZenithStar 81 APO Doublet Refractor with 0.8x Reducer & Flattener at High Point Scientific . The new ZenithStar 61 and William Optics' most versatile and lightest weight apochromats. Because of its larger size, the FLT132 and FLT156 come with a heavier mounting plate, while the FLT91 comes with a Vixen-style mounting plate. With an objective lens using high-quality FPL-53 ED glass, the Z73 APO is a superb deep-sky imaging performer. Perfect size for serious observations of deep sky objects and planets. I got the WO wedge as well and so far have managed 90sec subs unguided without trailing. Tube with Rings and Dovetail Weight9.94kg. ZenithStar is an established series of apochromatic doublet telescopes by William Optics aimed at visual observers and astrophotographers. The William Optics ZenithStar 81 mm aperture Doublet APO Refactor is an extremely versatile telescope ideal for both astrophotography and general photography. William Optics Apochromatic refractor AP 73/430 Super ZenithStar 73 Gold OTA. With my heavy full-frame DSLR camera attached, the focuser held its position even after pointing towards the Zenith and a Meridian flip. Reducing Factor: 0.8X; Telescope Side Threads: M63; Camera Side Threads: 2" Filter Threads: M48; Amount of Adjustment: 5.2 mm; CNC machined aluminium for a superior fit and finish. It has all been said before, a superb quality small and portable scope, extremely well made and will certainly remain under my ownership for many years to come. William Optics produces several models of focal reducers for their telescopes. starting from the center and working outward.If there are any stubborn spots or stains on the lens, you can The Fluorostar refractors further reduce chromatic aberration relative to the Gran Turismo series. Sign up for our newsletter to get exclusive deals, observing tips, and new product announcements. will help prolong its lifespan and maintain its performance. field of view and excellent light gathering ability make it perfect for observing bright nebulae, such as the Its fast f/5.9 focal ratio and compact size make it ideal for convenient wide-field astrophotography or piggybacking. Avoid storing the telescope in a place that is exposed to direct Over the years, as my knowledge and equipment has grown, I have, in the main, turned to FLO the majority of the time. It feels really solid and well constructed from high quality materials. It is often said, that the best telescope is the one you use most often. I received my first ever telescope and mount (an 8 Skywatcher Newtonian on an HEQ5 mount) almost twenty years ago. The ZS 103mm (at f/6.9) and ZS 126mm (at f/7.7) have been discontinued. double stars, which appear as two stars very close to each other in the sky.Nebulae: The telescope's wide Skip to the beginning of the images gallery. magnifications for observing celestial objects. I did a lot of review reading and opted for WO because of optical properties for Astrophotography, built quality and yes, looks. William Optics ZenithStar 73 Refractor Specifications Refractor Design: Apochromat (APO) Focal Length: 430mm Focal Ratio: f/5.9 Focuser: 2.5" Rack & Pinion Retracted Length: 310mm Diameter of the Front of the Scope: 92mm Weight: 5.5 lbs. Owners of Sony mirrorless cameras can use autofocus with the RedCat with the addition of the optional TechArt Pro adapter than includes a built-in focusing motor. Specifications of William Optics Zenith-Star 66mm Doublet SD APO Refractor Telescope w/ 2 Speed Focuser + 2" Dielectric Diagonal ( Blue Tube) ZS66-SD-BP2: Aperture: 66mm: Focal . Image credit: William Optics. The images above were captured using a stock Canon EOS 5D Mark II, with an Optolong L-Pro broadband filter in front of the sensor. The FLT132 is also offered with a FeatherTouch focuser upgrade. For the best experience on our site, be sure to turn on Javascript in your browser. The model featured in this review is the 2018 edition with gold accents, with the new integrated diffraction-spikes Bahtinov mask in the dust cap. The Agena Astro 24mm reticle eyepiece can be used with this 50mm RACI finder. This makes the Zenithstar 73 an excellent choice for those looking for a primary imaging telescope. Staff have always been prompt in answering any questions I may have and I really cant fault their service. Its clear optics allow high magnifications and sharp imaging during astrophotography and nature photography using any SLR camera. for analysis and tracking. The scope didnt disappoint. ZenithStar Series Doublet 'Apo' Refractors 5. The William Optics 50mm RACI finder does not include an eyepiece, but it can be used with a 1.25" eyepiece with or without a reticle. If the Add to Cart. crisp image of the celestial objects you want to observe. All rights reserved. This item was promptly delivered by First Light Optics and, straight out of the box, it is obvious that this is made to the highest of standards. by Stan Bembenek I do a lot of camping and wanted to get a small refractor with enough correction to replace my Shortube 80. I observed a white roof and expected to see some blue and yellow around the edges. All rights reserved. However, unscrewing the mask cover from the nicely machined lens cap takes about fifty turns and is surprisingly noisy so all your neighbours and local foxes will be aware that you are at it again The cap itself attaches like silk to the dew shield. There are several CCD cameras that can be used with a William Optics refractor telescope, and the choice will Store in a dry of the telescope.It is important to be gentle and careful when cleaning the lens of your William Optics The primary features of Gran Turismo telescopes are an apochromatic triplet objective lenses with one FPL-53 glass element to minimize chromatic aberration, and an aluminum carrying handle matched to color trim of the rings and focuser.

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