Prime Focus. Designed for serious Astro-Imagers. Amateur astronomers of all skill levels are always contemplating their next telescope, and this book points the way to the most suitable instruments. Our honesty & expertise helps us find you the right telescope. On the telescope side of the focuser, you will find a large flange to connect the focuser to the OTA. Would love a 100mm version. The T-ring adapter is provided with a lock screw and extra lock retaining screws.• Will accept any standard T-ring for your camera.• Inserts directly into 2" focuser. The types of CCD and CMOS … Focal Reducer (1) Focal Reducer and Field Flattener Combos (12) Focuser Collimating Ring & Camera Angle Adjusters (2) Illuminated Reticle Eyepieces (1) Prime Focus Photography (1) Coma Correctors (1) Dovetails That Fit Or That Are Made By. Copyright © 1996-2021 William Optics. The field-of-view with this reducer/flattener, the FLAT 73A, you will see a great increase. The Raptor 61 uses a 10:1 rack and pinion focuser in place of a helical focuser and includes high-quality hex rings to mount … This will allow for shorter exposure times and a wider field of view. This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. Found inside – Page 77Also shown are the JMI three - inch electronic Crayford focuser and the William Optics two - inch extender tube needed ... Using my own AstroPhysics 0.67x focal reducer for imaging widened the field of view and worked perfectly with the ... The reducing factor is … Fully multi-coated 2-element unit using Ohara glass. First image is without the field flattener with Nikon DX format sensor (APS-C) Next is the DX sensor with flattener, final 3 are with flattener and FX Full frame sensor. Listing more than 500 sky targets, both near and far, in 187 challenges, this observing guide will test novice astronomers and advanced veterans alike. Astro Essentials 0.5x 1.25" Focal Reducer (3) £19.00 Add to Basket. Optimised for the Evostar-72ED PRO, this superb quality accessory effectively reduces the telescope’s focal length by a factor of 0.85x and provides much improved field-edge correction. Brand new 0.8x adjustable reducer flattener by William Optics to suit the Zenithstar 61 series. Comes complete with integrated rotator and 2" filter holder. There is also a properly designed focal reducer / field flattener which provides a 0.8 reduction and is fine tunable. I realize that I will have to learn a lot of things again. 00 Regular price 9. William Optics Zenithstar 126 f/7.7 APO William Optics Zenithstar 81 f/6.9 APO HK$7,650.00 Be the first to receive our members only promotions and new product releases The T-ring adapter is provided with a lock screw and extra lock retaining screws.• Will accept any standard T-ring.• Inserts directly into 2" focuser. High Point Scientific was founded with the idea that high-quality telescopes and telescope accessories can be offered at low prices without skimping on customer service.. 373 Gentilly Ouest Longueuil, Quebec J4H 1Z9 - Canada Tel: (450) 463-5072 Toll-free: 1 888 540-0444 Contact us Found inside – Page 366Focal reducers were also used thus increasing the potential for each telescope. Firstly, the William Optics Megrez 90 mm doublet refractor was used. This has a native focal length of 558 mm (f/6.2). However, in order to produce a flat ... Z73 OTA + PLAT73R (0.8x) FLATTENER REDUCER = A$1549* *Prices subject to change due to exchange rate variations; Prices are confirmed for all William Optics products in stock! CAMERA: ZWO ASI1600MM Cooled Pro. Skip to main content ... Focal Reducer Lens Adapter Telescope Objective Eyepiece Premium Optical Glass. Imaging telescope: Sky-Watcher Esprit 120 840mm (f/7)Focal reducer: —Imaging … Posted on December 13, 2020 January 10, 2021 by astro. Physical store. The antireflection multi-coatings on all optical … William Optics Adjustable Flattener Reducer Flat61R for ZenithStar 61 Product no. But because of such riches, it is easy to get lost when trying to decide on what eyepieces to buy. This book will help readers choose the best eyepiece for them now and continue to serve as a treasure trove of information for years to come! This 0.8x Reducer/Field Flattener from William Optics is a great accessory that improves image quality by being able to adjust spacing without the need for extension tubes. 234,45 EUR* * excl.Shipping costs. Nebula. CAMERA: ZWO ASI1600MM Cooled Pro. You are free to manage these via your browser settings at any time. Designed with nearly Full frame chip-size DSLR cameras in mind Found inside – Page xivThese optics permit more amateurs to handle the job of setting up the tube assembly . With less weight comes not only ... Likewise , a focal reducer or a Barlow lens can have real benefits with respect to amount of field or contrast . I signed up for the pre-order, and Agena AstroProducts delivered my scope this week. Super-Transmission-Coated with 2-element unit was designed and produced by William Optics, the inner flattener lenses can be set at the optimum 66mm-86mm back focus by simple hand twist (Distance from flattener lens to film or CCD plane). William Optics FLT-91 Specs The best selection of telescopes, binoculars, spotting scopes and microscopes you'll find anywhere in Canada SHOP All Scopes. William Optics Flat 6A II or III with ASI 1600 - posted in Experienced Deep Sky Imaging: Anyone used a William Optics Flat 6A and ASI1600 with an older Meade 127 F7.5 APO? This books is not about making beautiful astronomical images; it is about recording astronomical images that are scientifically rigorous and from which accurate data can be extracted. Whether you're buying your first telescope or are an advanced astrophotographer, OPT has a wide selection of Schmidt Cassegrain Telescopes for any application. Found inside – Page 205It should be noted that a more economical way to increase the field of view is to use a focal reducer with less expensive 1.25-inch ... For a dielectric mirror diagonal, consider the Astro-Physics MaxBrite, William Optics dielectric, ... TS-Optics Optics 2" CCD Reducer 0.67x for RC & flatfield telescopes ab F/8. Earns … This William Optics 0.8x Flattener/Reducer has been designed to optimize the flat-field imaging performance of William Optics GT71, GT81, Z81 & Z103 refactors. The focal length of the Vixen FL55 is 239mm, with a focal ratio of F/4.3 (with the optional reducer used). As a focal reducer, this accessory will reduce your focal ratio by 0.7 for a wider field of … New 2020 William Optics GT81 IV! I found it perfect for my WO90mm but pretty sure it also works with other refractors between 500-100 focal length.Here is what W.O. TSShorty. William Optics 0.8x FR focal length = 260 mm ATIK 0.5x FR focal length = 80 mm * Note that the in-focus figure assumes that the FR-CCD spacing is added to your physical imaging train length (as when using the Meade/Celestron FR's with spacing tubes). 0.85x Focal Reducer/Corrector for Evostar-ED DS-PRO Telescopes. Leave a comment. Custom coordinates Generate an image of any … 100% safe shopping. SHOP NOW. says about it:* William Optics AFR-IV Adjustable Flattener is designed for refractors with 500-1000mm focal … When back focus becomes really critical to get right is when you’re using an optical corrector or focal reducer with your telescope or one that is integrated into the design. William Optics Gran Turismo 81 IV. This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. If you'd like some advice on choosing the best astronomy or astrophotography accessories to meet your needs, please don't hesitate to call us at 1-800-266-9590 or send an email. There was no real information other than theyre testing them. . • 35mm for full illuminated imaging circle. Full frame size. March 2019. William Optics Flat4 0.8x Reducer Flattener. Considering that it comes with a feathertouch focuser its one hell of a bargain. This FLAT73R is … Adjustable reducer flattener Flat73R for Z73. The dew shield is retractable and slides firmly but smoothly up and down the body of the scope. William Optics ZS 66 SD and focal reducers Facebook; Twitter; Youtube; William Optics ZS 66 SD and focal reducers. Of the three, the MPCC is the sharpest at the corners. Sky-Watcher Field Flattener for EvoGuide 50 - … Out of Stock. Optional Direct Wide Photo Adapter 60 and T-Ring or Camera Adapter 43 and T-Ring needed to mount to camera . The APO triplet optics of the Flat6AIII are made with Ohara glass and fully multi-coated to provide good illumination and a beautifully flat field across 97% of full frame sensors. No matter what you want to observe or image, SCTs can adapt to a variety … Orion 8894 0.8x Focal Reducer for Refractor Telescopes . Found inside – Page 57William H. Taylor Duncan T. Moore. | A. I a con9 . 1 7 . ... Meinel , A. B. , and G. W. Wilkerson , An F / 2 Focal Reducer for the 60inch U. S. Naval Observatory Telescope , Optical Sciences Technical Report 7 , pp . Then we move onto the new rotatable designed 2.5” Linear Power Focuser again with the Excellent 1:10 fine focuser. • Designed with APS chip-size DSLR cameras in mind. Found inside – Page 71[ Bingham , 1978 ] Bingham R.G. , A two - mirror focal length reducer and field corrector for prime foci . Optical and infrared telescopes for the 1990's , Kitt Peak National Observatory , ed . A. Hewitt ( 1980 ) , pp . 965–974 . Leave a comment. It allows the position of the 2 element lens system to be moved within the barrel so that it can be easily set at the optimum 66mm-86mm back focus distance (distance from flattener lens to film or CCD plane) appropriate for the focal length of the refractor. You may want to expand your eyepiece collection so that you have several matching sets of eyepieces for use in the binoviewers. 0.85x Focal Reducer/Corrector (provides f/7.65) Eyepiece Supplied (2"): 28mm LET ; 2”/50.8mm Di-Electric Star Diagonal ; 9x50 Finderscope ; Dual-Speed 11:1 2” Crayford Focuser (Backlash-Free) Multi-Coated Objective Lens ; Supplied with Tube Rings & Mounting Plate ; Aluminium Carrying Case; Be the first to Write a Review for this item! The William Optics GT-71 APO Triplet refractor features a 3-element f/5.9 objective with an Ohara FPL-53 extra-low-dispersion glass element for optimum colour correction and a new upgraded dual-speed 2.5-inch Rack and Pinion focuser with 1:10 Dual Speed. Found inside – Page 20Called the SV70ED, it comes with all the features of the William Optics Zenithstar 70 but includes a threaded dust cap ... and can be used as a faster one (f/5.6) when used in conjunction with a dedicated focal reducer/field flattener. Baader MPCC Mark III - Multi Purpose Newton Coma Correktor $ 204.00 ready for shipping in 24 h. TS Optics Komakorrektor 1.0x 2" $ 360.00 ready for shipping in 24 h. TS Optics Reducer/Korrektor Photoline 0,79x 2" $ 285.00 ready for shipping in 24 h. Skywatcher 0.85x Focal Reducer … FORS2 is an upgraded version over FORS1 and includes further multi-object spectroscopy capabilities. For Accessories ; For Mounts ; For Telescopes ; Primary Purpose of Filter . If you are using a FR like the ATIK that is fitted internally, then you have to add the FR-CCD spacing to this figure (to make it smaller). Was: $70.94. As a field flattener, this accessory will take care of annoying edge-of-field aberrations brought about by curved focal planes, resulting in clear, sharp images. This package includes a 0.8x Flat6A-81 reducer cum flattener specially designed for GT71 to transform it … 3D-nebulae from the 2D-images. The William Optics GT-81 APO Triplet refractor features a 3-element f/5.9 objective with an Ohara FPL-53 extra-low-dispersion glass element for optimum colour correction and a new upgraded dual-speed 2-inch Rack and Pinion focuser with 1:10 Dual Speed. Innovative Bahtinov Mask Cover (Patented) & New Dovetail Plate included! Tweet: Information; Customer Reviews (0) Stock & Delivery; Loyalty … Free shipping. StellaMira 2" 0.8x Reducer / Flattener for 90mm ED Triplet. Found inside – Page 69General-purpose focal reducers are made by Astro- Physics (www.astro-physics.com), Optec (www.optecinc.com), Lumicon (www. lumicon.com), William Optics (www.williamoptics.com), and other vendors. Found inside – Page 62The Art of Astrophotography Figure 8.1 The optical configurations of the William Optics Star 71 and Teleskop Service 65Q astrographs ... They provide a focal reducer that reduces the focal length to 385 mm and the focal ratio to f/3.6. William Optics RC focuser and 0.8x Reducer Flattener kit (Specify Color) $1,536.00. WO Flat 6AIII will provide good illumination and flat field across 97% of full frame sized sensors. NGC 6992 Imaging telescope: William Optics Zenithstar 61 APO 360mm (f/5.9)Focal reducer: William Optics … Attaches directly to telescopes with an M63 thread on the end of the focuser. Take a tour of the universe with Sky & Telescope Contributing Editor Sue French. Free P&P Free P&P Free P&P. Our SVX line are made to E-mail Stellarvue at The inner flattener lenses can be easily set at the optimum 66-86mm back focus (distance from flattener lens to film or CCD plane). Convenient• Flattens the field remarkably well for nice round stars! . I have for sale an adjustable William Optics field flattener/ focal reducer (0.8x) that has rarely been used and kept in box. An essential accessory for refractor astrophotography, this flattener features high quality CNC machined construction. Click to play video . SteveL 718 Posted October 10, 2007. Free shipping. Free US Shipping. Due into stock very soon! Add to Cart. Optimised for the Evostar ED PRO range, this superb quality accessory effectively reduces the telescope’s focal length by a factor of 0.85x and provides much improved field-edge correction. William Optics Flat4 0.8x Reducer Flattener. Get yours at OPT today! Amazing• It will flatten the field amazingly well and finally make you see those stars round!• This unique flattener works with WO or other 500-1000mm focal length refractors. WO Flat6A lll will provide good illumination and flat field across 97% of full frame sized sensors. Around the Khanscope Centre. Provides good illumination and a flat field across 97% of a full frame sensor field of view. By using this flattener/reducer the focal lenght changes to 336 mm making it a fast and wide F4.7 telescope. The touchstone for contemporary stargazers. This classic, groundbreaking guide has been the go-to field guide for both beginning and experienced amateur astronomers for nearly 30 years. Available with 30 mm or 42 mm Optics. The William Optics Flat7 0.8x Reducer/Flattener has been discontinued and we are out of stock. Based on reading about this instrument here on CN I am confused as to whether I need a flattener on not. All rights reserved. INTEGRATION: 27.8 hours. It seems to be getting good reviews and is one hell of a price for a stellarvue! This 0.8x Reducer/Field Flattener from William Optics is a great accessory that improves image quality by being able to adjust spacing without the need for extension tubes. Next page. 907 2895 01, First Light Optics Ltd All rights reserved © 2021, We use cookies on this website. Home > Accessories > Reducers/Flatteners, Model: William_Optics_AFR-IVPart Number: P-FLAT4. Reviewing the description it states it will work with any F6-F7.5 refractors. The William Optics 0.8x focal reducer is also available to reduce the focal-ratio to a fast f4.72. These are not necessarily the same objects that are the most spectacular or intriguing visually. The camera reveals different things and has different requirements. The large 50mm clear aperture lens will reduce vignetting to almost nil. Superb Finish• Superb William Optics anodized finish.• All internal surfaces threaded and blackened for no reflections. William Optics new AFR-IV Adjustable Flattener is designed for refractors with 500-1000mm focal-lengths. The first test for the new William Optics GT81IV Apochromatic Triplet FPL-53, i found several problem with the correct spacing of the Focal reducer/Flattener thus the result could be improved when I have next time to try. M42 Image credit: NASA, ESA, M. Robberto (STScI/ESA) and The Hubble Space Telescope Orion Treasury Project Team . I am pulling my William Optics FLT132mm f7 out of storage after a number of years and want to start imaging again. Found inside – Page 198Focal Reducer As the heading suggests, a focal reducer reduces a telescope's effective focal length, ... The best quality models currently available are dielectric non-metallic coated mirror diagonals by William Optics (Figure 12.4) or ... William Optics WE-FLAT2 Field Flattener Focal Reducer. GUIDING: Lacerta M-Gen II Autoguider ... FILTERS: Astrodon Ha 3nm-31mm, Astrodon OIII 3nm-31mm, SII 3nm-31mm. For example, many focal reducers designed for f/7 or f/8 ED refractors such as those from Tele Vue, William Optics, Sky-Watcher, and Meade are designed to have a working distance (or back focus) of 55mm. Baader MPCC. $86.00. This revolutionary new William Optics AFR-IV Adjustable Flattener / 0.8x Reducer was made for 500-1000mm refractors. William Optics also offers a wide assortment of field flatteners and focal reducers designed to work optimally with their refracting telescopes. An Introduction to Astronomical Photometry Using CCDsBy W. Romanishin $9.60 shipping. I am after one that does both jobs so that rules out the dedicated Flat73 which is just a flattener! I also ordered a Canon T-ring to mount my camera to the telescope and a William Optics camera rotator to be able to adjus the camera angle on the telescope. Customer Review: BOBLOV Refractor Telescope, Telescopes 70mm. The only moon reference you'll need at the telescope! When paired with a 0.8x William Optics field flattener and focal reducer (sold separately), the scope works at a fast f/5.5 with a flat field across the entire 43.3mm diagonal of a full-frame sensor. While this Astro-Tech #ATR8 0.8X reducer/field flattener is designed for prime focus astrophotography with quality f/6 focal ratio apo refractors such as the Astro-Tech AT72ED and AT130 apo, it will also work well with Astro-Tech and other brand refractors in the f/5.5 to f/7 … Over the years, I have been quite happy with the little scope as it has served as a wide-field instrument and as a guide scope. William Optics x0.8 Adjustable Reducer Flattener for ZS61. Exciting to see some new sizes come out. Merchant Video. CAMERA: ZWO ASI1600MM Cooled Pro. Found inside – Page 158034.065 FORS - the focal reducer for the VLT. ... 034.066 A coronagraph for COME—ON, the adaptive optics VLT prototype. ... These convert the shapes of line-emission sources, imaged in the focal plane of the 4.2-m William Herschel ... The Super-Transmission-Coated with 2-element lens system was designed and produced by William Optics, the inner flattener lenses can be set at the optimum 66mm-86mm back focus distance (Distance from flattener lens to film or CCD plane). Antares. This Vixen Focal Reducer takes the standard 1800mm (f/9) focal length down to 1278mm (f/6.4). OBJECT: Heart Nebula (IC 1805, Sh2-190) OTA: WO GT71. The William Optics FLT 91 Apochromatic Refractor. In 2007 William Optics joined in a venture with Ferrari, the world-renowned supercar manufacturer. SKU: WO-P-FLAT6AIII-M92 Categories: Astrophotography, Focal reducers, Brands, William Optics. Delivery service. New William Optics … This flange also works as a spacer, providing more space if you would like to add a user supplied filter wheel and/or Off-Axis Guider (OAG). This revolutionary new WO AFR-IV Adjustable Flattener / 0.8x Reducer was made for 500-1000mm refractors. The William Optics Star 71 recently caught my eye as a replacement for my old Borg 77. Narrow band imaging, O-III, S-II and H-alpha. William Optics Adjustable Field Flattener 68III # P-FLAT68III. William Optics WE-FLAT2 Field Flattener Focal Reducer. Super high precision “COPPER“ T mount for Canon EOS full frame Cameras. Scotts Honest Reviews . Phone/Email Support: Mon-Fri 10am to 5pm. Designed specifically for the William Optics Zenithstar 73 refracting OTA, this particular 0.8x field flattener and reducer is manufactured with full frame, chip-size DSLR cameras in mind. This flange also works as a spacer, providing more space if you would like to add a user supplied filter wheel and/or Off-Axis Guider (OAG). The Super-Transmission-Coated with 2-element lens system was designed and produced by William Optics, the inner flattener lenses can be set at the optimum 66mm-86mm back focus distance (Distance from flattener lens to film or CCD plane). To speed up the optics and create a wider field of view, the dedicated William Optics FLAT 6A III field flattener/reducer is available. Three-element air-spaced 71mm f/5.9 APO (apochromatic) refractor with FPL-53 objective … I tried using this with my Megrez 90, and had OK results but - again - probably did not have the spacing to the CCD set correctly, so never achieved measurably flatter fields. TSEL1. . It appears to introduce some chromatic aberration, however, and the corners still aren't perfect. New Adjustable Flat73A for Z73. The new 2020 GT81 three-element super APO Anniversary offer superb quality for imaging and visual use at an affordable price！. Focal 6.3/10/12.5/20/32mm Plossl Telescope Eyepiece Kit+1.25inch 2X Barlow Lens. This chnages the effective focal length from 710 and 568 and drops the focal ratio from native 6.9 to a usefully fast 5.5. If it is not, please direct me otherwise. A major feature of this book is the way it compares not only different classes of refractor, but also telescopes of each class that are sold by various commercial manufacturers. Upload your video . Features of William Optics 2" APO Apochromatic Field Flattener and 0.8x Focal Reducer for 66mm to 90mm Refractors WE-FLAT-2: This very elegant 2” reducer/field flattener has been designed for optimal results with the 66mm series of telescopes, although it is functional also with other 80 or 90mm refractors. William Optics 0.8x Reducer / Flattener v2. The APO triplet optics of the Field Flattener and Reducer was made with Ohara glass and fully multi-coated to provide good illumination and a beautifully flat field across 97% of full frame sensors. The text starts form first principles and explains each method up to the point at which the reader can begin practical work with the equipment and even start designing it. Found inside – Page 83It is designed around a fixed sensor spacing assumption for the longer William Optics FLT refractors but a little ... Field-Flatteners and Focal Reducers The need to buy a field-flattener for an APO telescope was a big surprise to me. Day Month Year . FORS1 was retired in 2009 to make space for X-SHOOTER; FORS2 continues to operate as of 2021. This accessory is a must-have for refractor astrophotography. TS Optics 0.5X focal reducer with 2” filter thread $ 81.00 Product can be shipped as of 01.12.2021 Order now!
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