9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. Coupled with my ZWO ASI1600 MM Pro, the field of view is 2. 4 Videos. 9 Triplet Apo Refractor with Carry Case - Space Gr. P-FLAT6AIII-M92. The back focus is a critical spacing that must be obtained if one is using a Flattener or Reducer. As low as $1,998. I recently removed the dovetail on top and put back in place the guide bar to its original setup the way the scope. This will be handy if you also are going to install a Electronic Automatic Focus (EAF) controller which sometimes will prevent you from. WO Gran Turismo 81 . Special Edition FLAT6AIII Adjustable Reducer / Flattener for William Optics Fluorostar FLT 91 Telescopes. Zillow has 23383 homes for sale in British Columbia. All reactions: 155. The reducers always look undersized in comparison. View full description. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. 1113. The three-element optical design features a 91mm aperture using FPL-53 glass. 4 Videos. Look no further than Bintel, where we endeavor to provide high quality service and after-sales support second-to-none! We stock a wide range of great telescopes and have been supplying amateur astronomers in Australia for over 30 years. Astrometry. Hey, Brian, FWIW, I'd avoid the FLT 91. 0. Fluorostar 132 f/7 APO. The William Optics FLT 91 is the perfect apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. 9 Imaging APO Triplet Refractor FPL-53 - Australian Authorised dealer Add the. Part number Ganymedes: WO-A-F120GD-RP33 . Fluorostar 91 Trailer. 9 APO Refractor features a three element triplet design and uses FPL-53 glass. Add to Cart. If your sensor is say at 48mm or at 67mm away, you may still see curvature, or still have coma affecting your images. 00. 9. Handle for twin-monitors Fluorostar. Imaging for cystoscopy, stone retrieval, urodynamics and other urology procedures can be simple and accurate with the OEC Fluorostar. skysurvey, on 15 Nov 2020 - 06:16 AM, said: No, the WO 91 Fluorostar isn't any cheap but I have no idea why, IMO we are talking about a 2515€ telescope and about a 1382€ telescope that are the same, don't let you that 1mm of difference confuse you. 8x Reducer / Flattener William Optics 2019 Slide Base 50mm Uniguide Scope Skywatcher AZ-EQ6GT Mount & Tripod ZWO ASI290Mini Mono Guide Cam ZWO ASI Air Pro ZWO 5v Electronic Focuser ZWO ASI1600mm Pro USB 3. Optional. 75") 1,065: William Optics Gran Turismo 81:New Fluorostar 132 (Innovative Bahtinov Mask Cover) ₹ 393,103. Reviews. Download Manual. The FRA500 is slightly lighter and slightly smaller in length. 40mm. The three-element optical design features a 91mm aperture using FPL-53 glass that delivers high contrast colour-free images and an impressive 0. My first light with the FLT91! Processing is still a challenge, but here is my FIRST narrowband image nonetheless! (I need more O3 and S2 for sure) Stay tune. Monitor Cart p/n OEC. 00 Regular Price $1,998. Regular Price $1,998. Adjustable reducer flattener Flat61R for Z61 . 00. 00 ₹ 369,310. The deep-sky imaging performance of that little APO is what. Latest version from new WO FLT 91 + 2600MC + L Ultimate. 7) / GTF102 : Telescope or lens: 3: 20: William Optics Gran Turismo 102 / GT102 : Telescope or lens: 22: 345: William Optics Gran Turismo 153 / GT153 :ウィリアムオプティクス社 Fluorostar 91mm3枚玉 FPL53アポクロマートレンズの新鏡筒優れた光学設計によりストレールレシオ95%以上を達成しております[有効径] 91mm[焦点距離] 540mm(F5. William Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI2600MC Pro Mounts Sky-Watcher EQ6-R Pro Acquisition details Dates: Feb. : +1-847-513-6201. 91 von 91 01. 0. You have to take out a screw on the bottom of the focuser to get to the 2 set screws holding the knob on and then remove knob. FLAT6AIII special edition for Fluorostar 91. Page 11 of 23 - WO Fluorostar 91 - new scope - posted in Refractors : Thats with the WO reducer for this scope and a QHY268. Note: Adjustment Distance for DSLR and Mirrorless Cameras (and other cameras with the same backspacing) is 5. TALK TO AN EXPERT : 919833974700. $656. For the William Optics . 00. 132K subscribers in the kolkata community. 00 Regular Price $1,998. Add to Cart. This is a 2 piece U Bracket that allows a BeeLink MiniPC and Pegasus Astro UBP2 to mount on top of a Fluorostar 91 scope. January 18, 2023. How to install the FLAT6AIII on the William Optics Fluorostar 91 Triplet. Component What I use; Optics: William Optics Fluorostar 91 w/reducer: Filter Wheel: ZWO 7-position automated filter wheel (50mm/2″) Filters: Astronomik Deep Sky Red, Green, Blue, plus MaxFR Ha, and L1 luminance (Astronomik Oxygen III and Sulfur II filters are on order) Stellarvue and Feather Touch, here I come. 72) Filter: Chroma 36mm HA 3nm Telescope Filter - Unmounted. SH2-91. The three-element optical design features. William Optics Fluorostar 91 — Combines a compact design with remarkable imaging capabilities. TS Optics has good offerings at a decent price but I’m a bit concerned about purchasing overseas . Wish List Compare. Regular price $933 1. William Optics Fluorostar 91 / FLT91 Imaging Cameras QHYCCD QHY183C Mounts iOptron CEM26 Software Pleiades Astrophoto PixInsight · Russell Croman Astrophotography BlurXTerminator · Russell Croman Astrophotography NoiseXTerminator · Stefan Berg Nighttime Imaging 'N' Astronomy (N. Takahashi. You're reviewing: FLAT6AIII special edition for Fluorostar 91. 00. These stars have very strong stellar winds and are extremely hot, with surface temperatures ranging from 20,000K to 210,000K. Fluorostar 91 APO . Page 22 of 23 - WO Fluorostar 91 - new scope - posted in Refractors : Well oddly enough I reached 4% tilt adjustment the one night I tried that (beginners Luck) but the next imaging session I had the bad stars and I tried to adjust the tilt but didnt work for me that night. 99. Wish List Compare. 575kg (OTA with William Optics Fluorostar 91 Triplet APO Refractor Telescope with 3. Here is my FLT 91/Reducer combo with a 2600MC, so the chip is bigger and the pixels are smaller, both of which put a larger strain on the optics. $284. The William Optics Fluorostar 132 (FLT 132) is ideal for astrophotography due to the FPL-53 glass objective lens. Benny Sachdev. Hope that WO reads related threads here and strive to improve. The William Optics FLT 91 is the perfect apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. For a guide camera I'm thinking an ASI120MM or a ASI220MM -- Is there any advantage to the more expensive. As far as adjusting the initial backspacing it can be done indoors. Seems like an unreleased scope with their new internal focus system. Zygo test available at additional cost. As low as $1,998. WO FLT91 and Moonlite Focuser - posted in Refractors : Yeah, yeah! Go ahead and blame me for the beautiful weather. Intl. Started by mewmartigan , Sep 09 2020 06:02 AM «. · 151 views. Telescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. SH2-91 is a faint supernova remnant in Cygnus. I've been considering a WO FL 91 for awhile to use only in visual observing. Lo scorso anno avevo presentato sulle pagine di Binomania due rifrattori WIlliam Optics da 61mm e 81 mm della serie Zenithstar. 5mm spacer, but got elongated stars in the four corners. 31 micron pixel camera, so 0. 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. William Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI533MC Pro Mounts ZWO AM5 Filters Antlia ALP-T Dual Band 5nm 2" Accessories William Optics Flat68 III · ZWO ASIAIR Plus Software Pleiades Astrophoto PixInsight Guiding Telescopes Or Lenses ZWO 30mm Mini Guider Scope Guiding Cameras ZWO ASI120MMThe Soul Nebula is a large emission nebula located in the constellation Cassiopeia, about 7,000 light-years from Earth. Fluorostar 91 APO Triplet Refractor. C. 9 telescope has a retracted length of just 390mm (15. I placed a star finder on it. Those look so nice. 3" R&P Focuser Image Circle : >43mm Retracted Length :. WarpAstron WD-17S 1 3. Providing the supreme visual and photographic performance astronomers expect from a medium sized telescope, the William Optics Fluorostar 91 f/5. 8 These are premium instruments. Obviously for deep sky and nebula better quality images will be captured with a refractor. 813. Dielectric Coating Diagonals; Erecting Prisms; Accessories. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. The three-element optical design features a 91mm aperture using FPL-53 glass. 00. 1 Introdução e Segurança. 00. add to list. This is a top of line material used in only the finest refractor telescopes. I’m on the verge of purchasing a new refractor, I currently have an EQ6 R pro, a SkyWatcher 200 PDS and a Canon R6. item 7 William Optics Fluorostar 91 FLT91 f/5. William Optics Fluorostar 91 by William Optics. Basic Information: Telescope: William Optics FLT 91 with FLAT 6AIII reducer. com. Hope you enjoy the image! Happy Holidays! The Soul Nebula is sometimes also known as the Embryo Nebula or IC 1848, which is an emission nebula located in the constellation Cassiopeia. 7. The STM-coatings and superb quality provideThe FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. The new William Optics Fluorostar FLT 91 is a three element air-spaced apochromatic refractor with a focal ratio of f/5. 焦点距離はx0. Takahashi. When I looked at the fov it matched the Esprit 100ED I was also looking into buying for imaging. 00. Add to Cart-23. WO Fluorostar 91 - $2k and similar focal length as my 80mm. Scribd is the world's largest social reading and publishing site. Qty. 9AM-5:30PM CT Mon-Fri. 72) Filter: Radian Telescopes 2" Triad Ultra Quad-band Narrowband Filter; Mount: Sky-Watcher HEQ5 Pro (Rowan Belt Modification for better tracking and autoguiding)“Fluorostar” is a brand name of a line of WO refractors. Free Contiguous US Shipping. I also received the WO FLAT 6A III x0. 9. 3″ Rack & Pinion Focuser ($2000) This is a good example of an APO refractor that is designed and packaged primarily for the Astrophotography market. 72X (TKA36580L) · William Optics Flat6A III. Be the first to review this product . Fluorostar series; Gran Turismo series New; ZenithStar series; Guider series New; Finder series; Binoculars; Eye Pieces. As I may sell the 100, I can live with. Add to Cart. The 68III is at least twice as big and twice as heavy as the 6AIII. Im excited. . 00 Shane23 #. $8,898. That does not mean that it cannot be used visually, with an eyepiece, for the visual observer who wants the very best image. $1,568. 07 pixel) compared to the case without a reducer (2. Agena AstroProducts is pleased to carry products from the following leading astronomy brands. Can I use a 2. That is just about the limit of the sky, guiding and diffraction limit for a 91mm aperture. FLO had the FLT 91 in stock in red so I took the plunge, my guide scope is the William Optics 50mm with a ZWO 290MM and the main camera is a ZWO 294MC. Be the first to review this product . f/5. William Optics FLT 91 Fluorostar 91mm f/5. An Avro Lancaster bomber built in Ontario by Victory Aircraft Ltd. º 5477779_1 GE OEC Medical Systems GmbH. How to install the ZWO EAF on the William Optics Fluorostar 91. If I had to do it over again, I would completely skip the Zenithstar. Fluorostar 91 APO Triplet Refractor. 3" Rack & Pinion Focuser. 0 TELESCOPE. 75 thread on the opposite end. Filter: Chroma 36mm HA 3nm Telescope Filter - Unmounted. Description Reviews (0) Description. 32. The FRA500 is slightly lighter and slightly smaller in length. Buy another brand of same specifications almost, i have TS Optics one that i ordered. Crypto2. Sort By: Quick view Compare Add to Cart. Page 1 of 2 - William Optics Fluorostar 91 Focuser Issue - Response from WO themselves. My question is, will I notice a substantial improvement in the quality/ resolution of my images with a new scope? I'm looking at a 90mm triplet such as the StellaMira 90mm ED Triplet or the William Optics Fluorostar FLT 91, basically the biggest, fastest scope my mount will cope with. The three-element optical design features a 91mm aperture using FPL-53 glass. 99. Tilt in my Fluorostar 91 and image train - please help with process here - posted in Beginning Deep Sky Imaging: Hi All Thanks in advance for help/advice you can provide. 9) triple apo. Glass is the same, but you can pay extra for the report on the WO. Telescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. The three. Sale price. It is similar to the Gran Turismo series, and at present it comes in apertures of 91mm at f/5. Now Only $998. Flickr photos, groups, and tags related to the "fluorostar" Flickr tag. Deutsch; Français; Espanol; Currency: USD. SKU. SKU. Warning, the EAF and focuser shaft will. New-36. Part number manufacturer: A-F120GD-RP33 . This is the same item as the P-FLAT6AIII reducer/flattener sold for other WO. In stock. 40mm. The three-element optical design features a 91 mm aperture using FPL53 glass. 30 ₹ 4,310. Share. The focuser is solid and doesnt move in a way which it. 99. AstroBin is an image hosting platform and social network for amateur astronomers and astrophotographers. William Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI2600MM Pro Mounts ZWO AM5 Filters Optolong H-Alpha 3nm 2" · Optolong OIII 3nm 2" · Optolong SII 3nm 2" Accessories. Filter: Chroma 36mm OIII 3nm Telescope Filter -. WO Fluorostar 91 - new scope. For the WO 1x Flat (68III), you must be 65mm. Whereas the WO 91 is a natural f/5. If your sensor is say at 48mm or at 67mm away, you may still see curvature, or still have coma affecting your images. - -10C cooled - Shot on April 26 and 27 night - 32 flats, darks, bias for each night Processing Details (PixInsight only):. Rated 0 out of 5 $ 1,698. The hottest star in the cluster has the stellar classification A2 and a visual magnitude of 8. The three-element optical design features a 91mm aperture using FPL-53 glass. Back In Stock! RedCat 71 APO 350mm f/4. The red trim has grown on me, and my wife likes it. 75") 933: William Optics Gran Turismo 71 APO Refractor with Flattener: Triplet Refractor: 71 mm (2. Quickly record images in a ready-to-use format. Mount: Sky-Watcher EQ6-R Pro (Used iOptron Tri-pier with Adapter 8036-TK)Special Edition FLAT6AIII Adjustable Reducer / Flattener for William Optics Fluorostar FLT 91 Telescopes. 00-425212-01. William Optics. 00 ₹ 189,731. Fluorostar 91 APO. FREE delivery Fri, Nov 17 on $35 of items shipped by Amazon. Pegasus Astro Indigo Filter Wheel (7 position, 2" or 50mm filters) 1 32. Experience the best of the line: the Williams Optics FLT151 Triplet APO f/6. 5mm spacer, but got elongated stars in the four corners. New Fluorostar 156 (Innovative Bahtinov. Because the Fluorostar 110 is well suited to viewing nebulae, clusters, large galaxies and comets, we recommend the use of high quality wide angle eyepieces. DESCRIPTION The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence. 5599179_3 GE OEC Fluorostar Compact/Series 17. Service_manual_GE_OEC_Fluorostar_7900. Write Your Own Review. It is similar to the Gran Turismo series, and at present it comes in apertures of 91mm at f/5. 00. Add to cart. 00 Select options. I hope this helps. Telescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. 25 , , , , , Download: free Website: Thingiverse. Wish List Compare 【Refurbished】Gran Turismo 81 IV-Space Grey . William Optics Fluorostar 91 Triplet APO Refractor Telescope with 3. William Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI533MC Pro Mounts ZWO AM5 Filters Antlia ALP-T Dual Band 5nm 2" Accessories William Optics Flat68 III · ZWO ASIAIR Plus Software Aries Productions Astro Pixel Processor (APP) · Pleiades Astrophoto PixInsightWilliam Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI294MC Pro Mounts iOptron CEM70 Filters Optolong L-Ultimate 2" Accessories Primaluce Lab EAGLE4 Software Pleiades Astrophoto PixInsight Guiding Telescopes Or Lenses William Optics UniGuide 50 Guiding Cameras ZWO ASI120MM MiniTakahashi FSQ-106EDP · William Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI2600MC Pro Filters Optolong L-Pro 2" Accessories Takahashi 645 Reducer QE 0. 0 Items - $0. 00. And attached is a FWHM-Eccentricity analysis of the luminance data. 51 shipping. 8 Reducer - DIY 3D printed guide cam with IMX290 and ZWO 30F4 Acquisition Details: - 100 x 120s + 230 x 60s - 0 gain. 25" Diagonals & Erecting Prisms. FLAT6AIII special edition for Fluorostar 91. 8なのでf540mm→432mmに。 汎用ですが特にWO製品に最適設計。フルサイズ対応。 FLT-91スペシャル版は鏡筒への接続用にM92→M63変換ADが付属します。接眼AD”ROTOLOCK”を取り外してねじ込み固定。”William Optics Fluorostar 132 / FLT132 · William Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI2600MM Pro · ZWO ASI6200MM Pro. The Fluorostar 120 is a Three Element Designed APO refractor. Using the appropriate T-Mount and T-ring, users can create a functional imaging setup with the FLT91. 72) Filter: Chroma 36mm SII 3nm Telescope Filter - Unmounted. Fluorostar 120. Add to Cart. 540mm. I'm looking forward to this coming Christmas. (Pre Order)New Fluorostar 156 (Innovative Bahtinov Mask Cover (Patented) included) As low as $7,398. In stock. William Optics Fluorostar Series:. The STM coatings and superb quality provide excellent optical performance and unmatched value. 9 & GH5. Victoria’s modern rock @ 91. The focuser has smooth, precise reduction, a temperature display and a large adjustment range. Add to Cart. Not sure how much of the actual manufacturing they do, but they seem to design them. 00. OCAL Electronic Collimator 1 9. 00. Really enjoying the new setup. ع. Fluorostar 91 BUY NOW New for 2021 - The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. 9. $293. buy DETAILS. . I have somewhat narrowed it down between an Esprit 100 or the William Optics Fluorostar 91. My camera is an ASI. If you go back one page youll see examples posted by several people. If your camera chip is too close or too far away, then the elements will not actually perform their intended corrections. Pixel scale looks good with my 533 MC Pro, should frame some of the DSO's nicelyWilliam Optics Mortar三脚用 赤道儀接続アダプター タカハシP-2赤道儀用The William Optics FLT 91 is the perfect apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. 180. Tags WIlliam Optics Fluorostar 91 ZWO EAF Mount. I am fairly new to Astro (about 8 mo) as my first scope is a Celstron 8SE. . 00 My account / Register. $34. 8x Flattener/Reducer APO · ZWO ASIAIR Plus SoftwareWilliam Optics Fluorostar 91 / FLT91 Guiding Cameras ZWO ASI174MM Mini Acquisition details Dates: Feb. Equipment Check - posted in Equipment (No astrophotography): Noob here, just want someone to sanity check my start up of my newest hobby. Price is $1850 shipped with no PayPal fees. The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. T-FLT-91. 00. There are a few superficial scratches on the tube but the optics are great. My current SW 100ED APO is a fine scope but as I tend to be a "grab n go" kind of guy, the shorter tube of the FL 91, mounted on my Porta II really appeals to me. 00. All New Adjustable Flat6AIII (T-mount not included) $229. You're reviewing: FLAT6AIII special edition for Fluorostar 91. Identical to the standard FLAT6AIII optically but with an additional adapter to fit the FLT 91 telescope. Mounting Rings;Telescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. Add to Cart. Gain 0, -10C, 54 each 300 sec lights + flats + dark flats + darks. 00 Regular Price $1,568. ZWO EAF 4 42. 510mm. These corrective optics work best at a specific distance away from their glass elements, most commonly 55mm. The three-element optical design features a 91mm aperture using FPL-53 glass. handle for cover MC5. Lens Type Apochromatic Triplet Prime Lens Focal Length 540mm Diameter 91mmFluorostar 91. 9. 18, 20221. 250 180 second exposures. I just purchased a William-Optics Fluorostar 91 telescope and Flat 68 iii field flattener, and have a question about connecting a ZWO ASI 533 MC Pro camera. Fluorostar. 1. about 8 hrs of data over 2 nights. Ele também contém informações de Referência técnica. 3 FM. William Optics. The flattener can be securely screwed on to the focuser. The back focus is a critical spacing that must be obtained if one is using a Flattener or Reducer. All New 50mm Guiding Scope. Fluorostar 91 APO . WO is offering a special edition Flat6AIII, it's the same FF/FR, but it. $2,494. Brand: William Optics . $99. The three-element optical design features a 91mm aperture using FPL-53 glass. Manufacturers & Suppliers of Astronomical Telescopes in India Serving Amateur Astronomers Since 1976The OEC Fluorostar can give you the ability to image right in your emergency room. High-Quality Refractor Telescopes, Binoculars, Eyepieces, Diagonals and other Optical Accessories. Optional. View listing photos, review sales history, and use our detailed real estate filters to find the perfect place. William Optics manufactures Refractor telescopes, binoculars, digital camera adapter lenses for telescopes, eyepieces, diagonals and other accessories. Any suggestions for good double star targets for 90 mm of refractor?FLAT6AIII special edition for Fluorostar 91 . To see how to install the Flat6Aiii including the correct back focus go to the following link:two flatteners/focal reducers is like having two telescopes with different focal lengths. New for 2021 – The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. Dielectric Coating Diagonals; Erecting Prisms; Accessories. Tel: +34 91 663 2500 Turkey - Istanbul Tel: +90 212 36 62 900 UK - Slough Tel. The FLT 91 is a superb instrument and I will be using it regularly when the nebula season returns this summer. 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. Broad band images were taken from a Bortle 3 site in Sand Point Michigan while the Ha was shot from my backyard (Bortle 7). The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. The FLT 91 is an Apochromatic refractor with a focal length of 540 mm and an aperture of f/5. 900. 00 Original price. I can only say that Esprit owners seem well satisfied and and the same is true of Willams Optics scope owners. William Optics GuideStar 61 APO With Case £399. . The STM-coatings and superb quality provideWilliam Optics FluoroStar 110 mm ED Triplet f/7 APO Refractor Telescope on sale and available from our online store. The three-element optical design features a 91mm aperture using FPL-53 glass. Images of space, taken by amateurs. Gran Turismo 71 f/5. 00 Shane23 #. Description For FLT 91 ONLY! Special edition flattener/reducer with adapter for the Fluorostar 91 telescope. Page 1 of 12 - My all new Askar 107PHQ - posted in Refractors : Hi all, finally received the new Askar 107PHQ I was waiting for! I was really surprised by the weight and the massiv build! Overall quality seems to be very good, at least I could not find anything that looks or feels cheap. Filters: Chroma SHO 3nm - 36mm. 9. Im trying to sort out the best way to diagnose and adjust out the tilt (I assume its tilt) Im seeing on my FLT91 setup. Ive become a fan of Williams Optics. 5" Focuser) As low as $8,198. Help with focusing on a new setup - posted in Experienced Deep Sky Imaging: Hello! I just received a new William Optics telescope and tried it for the first time. The STM-coatings and superb quality provide excellent optical performance and unmatched value. What made this project so difficult was the abundance of stars in the region. Optional. $2,697. New Gran Turismo 81 (discontinued) Details. Write Your Own Review. Wish List Compare. Sale Regular price $1,998. The features of the Fluorostar 91 RotoLock William Optics Fluorostar 91 FPL53 Triplet APO Refractor with 3. I. 6 and can be reduced with a reducer to f/3. add to list Tags BEE-LINK SER5 Pro wall mount and USB Drive Carrie. add to list. N. Cover the telescope: When storing the William Optics telescope, it is important to protect it from dust and moisture. CLOSED: Thanksgiving, Christmas Day, New Year's Day.