SKU: T-FLT-91 Category: William Optics. William Optics Fluorostar 91 Apo Triplet William Optics Flat 6A III 0. The tube weighs just 3. Details and Features. Page 5 of 23 - WO Fluorostar 91 - new scope - posted in Refractors : I have the Flat6AIII on my GT71, M63 focuser thread, and the 68III on my FLT 132, M92 focuser thread. 8 triplet on its website. . Now Only $998. 9. Glass is the same, but you can pay extra for the report on the WO. 4 Image circle: 44mm Objective lens: Quintuplet air-spaced APO (including two ED glass)William Optics Fluorostar 91 Triplet APO Refractor Telescope with 3. The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. Warranty: 2 jaar . Edited by e34stx, 13 April 2021 - 04:46 AM. 8x for Fluorostar 91 - suggested by web store. FLAT6AIII special edition for Fluorostar 91. ر. ln addition, with STM-coatings enabling superb optical performance, the FLT 91 provides excellent. Mount: Sky watcher EQ6R-pro. Fluorostar 120. Benny Sachdev. 30 Add to cart; WO Cellphone Holder Telescope Adapter for any type of smartphones!!! Read moreThere are 91 ads in this category. Quick view Compare . Intl. Oggetto di questa recensione. 00 Regular Price $1,568. (FLT 132), 60 Mins Each of RGB (FLT 91) and 6 hours of Ha from my back yard. Filters: Chroma SHO 3nm - 36mm. 1. The Stellarvue SVX102T-R has also caught my eye, with bigger aperture and less expensive flattener/reducer. 9) triple apo. The Fluorostar 120 is a Three Element Designed APO refractor. AstroBin is an image hosting platform and social network for amateur astronomers and astrophotographers. 25" inch RedCat Erecting Prism - Silver Version (for RedCat 51 only) $137. 8 Reducer. Wish List Compare. Identical to the standard FLAT6AIII optically but with an additional adapter to fit the FLT 91 telescope. Now Only $998. 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. handle for cover MC5. More than a playlist. 3″ R&P Focuser Color Red Space greyWilliam Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI2600MC Pro Mounts ZWO AM5 Filters Optolong L-Ultimate 2" Accessories William Optics Flat68 III · ZWO ASIAIR Plus · ZWO EAF Software Pleiades Astrophoto PixInsight Acquisition details Dates: Dec. Get the best telescope and astrophotography gear with North America's highest-rated telescope store. I only got the EC from Mile High as I was tired of waiting for the non-EC to be in stock and have done 2 minute subs unguided as well as 5 minute subs that look OK. → Equipment Discussions. The STM-coatings and superb quality provide. 48mm T mount for Pentax K - Black . Page 14 of 23 - WO Fluorostar 91 - new scope - posted in Refractors : Got my EAF last Friday and installed it on the new WO FTL91 and took it out for another spin. New Fluorostar 132 (Innovative Bahtinov Mask Cover (Patented) included) 1 Review . N. I selected this model because of the excellent optical quality, large number of included accessories and the avaliability of multiple options of field flatteners from William Optics. Wish List Compare. William Optics Fluorostar 120 - Red. 77 degrees (see scope mounted, Version B). Lens Type Apochromatic Triplet Prime Lens Focal Length 540mm Diameter 91mmFluorostar 91. Fluorostar 91 APO. Seems like an unreleased scope with their new internal focus system. Hours of Operation. 0 Mono ZWO 36mm Ha, SII, OIII 7nm. 8 These are premium instruments primarily aimed at astrophotographers, but they can also be used for visual observations. Altair Wave Series 115 F7 ED Triplet 1. I recently acquired the William Optics Fluorostar 91 as both a visual and imaging telescope. Add to Cart. 9. add to list. I've tried multiple back focus adjustments and have adjusted the adjustable flattener/reducer. Filter: Chroma 36mm OIII 3nm Telescope Filter -. Showing 40 ads per page. Telescope: William Optics FLT 120 (780mm at F/6. The STM coatings and superb quality provide excellent optical performance and unmatched value. Using the appropriate T-Mount and T-ring, users can create a functional imaging setup with the FLT91. 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 William Optics Flat68 III · ZWO ASIAIR Plus · ZWO EAF · ZWO EFW 5 x 2" Software Pleiades Astrophoto PixInsight Guiding Telescopes Or Lenses. Retracted Length. It is the result of a shock wave emanating from a Wolf-Rayet star. Most of the work went into de-emphasizing the stars to make the nebulosity stand out. The three-element optical design features a 91mm aperture using FPL-53 glass. The hottest star in the cluster has the stellar classification A2 and a visual magnitude of 8. 00 ₹ 369,310. Wish List Compare. Be the first to review this product . Was wondering what people thought of them. $959. The STM coatings and superb quality provide excellent optical performance and unmatched value. 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. William Optics Fluorostar 91 Triplet APO Refractor Telescope with 3. net job: 7291421 RA center: 05 h 23 m 03 s. . 02. Cameras: ZWO ASI 2600mm Pro and ZWO ASI 120mm-mini. Warning, the EAF and focuser shaft will. 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. Note: Adjustment Distance for DSLR and Mirrorless Cameras (and other cameras with the same backspacing) is 5. Write Your Own Review. Telescope: Fluorostar 91 APO / Fluorostar 132 / Takahashi FC-100 Or something in this category up to 10-12k EUR Mount: ZWO AM5 Mount / ZWO TC40 Carbon Control:. Shop William Optics FluoroStar 110 mm ED Triplet f/7 APO Refractor Telescope | Be The First To Review William Optics. 72) Filter: Chroma 36mm HA 3nm Telescope Filter - Unmounted; Filter: Chroma 36mm OIII 3nm Telescope Filter - Unmounted; Mount: Sky-Watcher EQ6-R Pro (Used iOptron Tri-pier with Adapter 8036-TK)The William Optics Fluorostar 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. 3" R&P Focuser. 2019 All New Slide-base 50mm UniGuide Scope (with a Unique 1. 1113. 00. The William Optics Fluorostar 132 (FLT 132) is ideal for astrophotography due to the FPL-53 glass objective lens. Fluorostar 91 APO Triplet Refractor. 4mm spacing is more or less a. All New Slide-base UniGuide 32mm Scope. New for 2021 - William Optics Fluorostar / FLT 91 An Apochromatic triplet refractor for visual astronomers and astrophotographers who want very high performance from a midsize telescope. CryptoTelescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. Price jumps out as the obvious difference $3210 vs $1999 though availability and color might be a consideration. 9 Triplet Apo Refractor. / NINA) Guiding Telescopes Or. FLT-110mm F/7, 770mm with pair of 115mm mounting rings and Custom Aluminum Case. The deep-sky imaging performance of that little APO is what. William Optics Fluorostar 91 by William Optics. 0 mm in spacers and still the same problem. 00-425243-01. Borg 107fl / Esprit 100 / WO fluorostar 91 I’d love to get a Tak FSQ 106 but my wife would likely shoot me 😀 comments sorted by Best Top New Controversial Q&A Add a Comment. William Optics Fluorostar 91 Triplet APO Refractor Telescope with 3. Im looking for a reasonably sized. 8x reducer (6Aiii), you must be 62. Sort By. William Optics Fluorostar 91 ZWO ASI6200 MC ZWO ASI6200 MM Celestron CGX Radian Triad Ultra Narrowband Filter Software Photoshop Adobe Camera RAW DeepSkyStacker Topaz Denoise AI Starnet++ Processing Stretch Blend with Starnet++ star-less image for each stack Mono image as Luma. Part number Ganymedes: WO-A-F120GD-RP33 . 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. The three-element optical design features a 91mm aperture using FPL-53 glass. Qty. As far as adjusting the initial backspacing it can be done indoors. 00. Add to Cart. 00 Regular Price $1,568. Heywood. For the William Optics . 6 focal ratio, ideal for wide-field imaging of the deep sky Petzval design ensures flat field across 44mm image circle, while two ED elements virtually eliminate chromatic aberration Rotatable 3” rack-and-pinion focuser, M68-M48 adapter, 2” adapter ring, and 1. Page 1 of 2 - Good double stars to test out a new 90 mm refractor - posted in Double Star Observing: I just received a WO Fluorostar 91 (F 5. Price is $1850 shipped with no PayPal fees. Am I on the right lines?WO Fluorostar 91 FPL 53 Triplet - posted in Refractors : Ive been using a Zhumell 130 dob for several months. January 18, 2023. Wish List Compare. The FLT132 is a different beast in terms of weight for a mount 3-4kg might not seem much but it is the moment of the arm that counts and that makes refractors more difficult to mount well. 8x reducer/flattener Pegasus focuscube IOptron CEM26 NINA on Melee quieter3c 60s * 30 images * 6 panels 32 darks, bias, flats processed in Pixinsight Reply More posts you may like. William Optics. The three. WR-134 is the blue arc seen in the image. It is about 70 times more luminous than the Sun. 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 William Optics Flat68 III · ZWO ASIAIR Plus · ZWO EAF · ZWO EFW 5 x 2" Software Pleiades Astrophoto PixInsightWith a focal length of 478mm, this f/5. 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. 00. 3" Rack & Pinion Focuser - Space Grey Version. 95+. William Optics Fluorostar 91 FLT91 f/5. The FLT 91 is an Apochromatic refractor with a focal length of 540 mm and an aperture of f/5. The W-O web site for the Flat 68 iii shows the back focus for the FLT91 as 75 mm, but also indicates the adjustment distance for a DSLR or mirrorless camera as 5 mm. Important - colour may differ from photo, we will have this photographed shortly. SKU. I decided to upgrade to a WO Fluorostar and EQ6-R and the results are super good. Fluorostar series; Gran Turismo series New; ZenithStar series; Guider series New; Finder series; Binoculars; Eye Pieces. The flattener can be securely screwed on to the focuser. 9 Imaging APO Triplet Refractor FPL-53 - Australian Authorised dealer Add the. The visionary team of designers and engineers at William Optics spared no effort in selecting the finest. Transfer easily. . Add to Cart. In stock. New-25. OTA Weight. Reviews. ASKAR FRA400 Quintuplet refractor with 72mm aperture and f/5. 00 Regular Price $1,998. : +1-847-513-6201. The features of the Fluorostar 91 RotoLockWilliam Optics Fluorostar 91 FPL53 Triplet APO Refractor with 3. The Esprit+EQ8 are probably a "handful" in terms of handling, but I have seen people use it in they backyard without a permanent installation. Add to Cart. SH2-91. 00 Dennis Spender #. William Optics RedCat 51 (Unboxing) 0:16. Obviously for deep sky and nebula better quality images will be captured with a refractor. Add to Cart. 【Refurbished】Fluorostar 91 APO-Red . 9 Imaging APO Triplet Refractor FPL-53 ProAstroz William Optics Fluorostar FLT91 f/5. Title Spare Part List Fluorostar 2nd Edition lower SN 10000. Details. 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. The three-element optical design features a 91mm aperture using FPL-53 glass. We would like to show you a description here but the site won’t allow us. 00. When I looked at the fov it matched the Esprit 100ED I was also looking into buying for imaging. $34. Sale price. Be the first to review this product . 1 Escopo Este manual contém informações sobre a operação do sistema, os componentes, as chaves de controle, os interruptores e riscos dos dispositivos Fluorostar Compact e Series GE OEC. 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. Fluorostar series; Gran Turismo series New; ZenithStar series; Guider series New; Finder series; Binoculars; Eye Pieces. Add to Cart. 00 Shane23 #. William Optics Fluorostar 120 - Space Grey. 00. The William Optics FLT 91 is the perfect apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. 7. I am fairly new to Astro (about 8 mo) as my first scope is a Celstron 8SE. Fluorostar 91 APO . Part number manufacturer: A-F120GD-RP33 . You're reviewing: FLAT6AIII special edition for Fluorostar 91. 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. I recently removed the dovetail on top and put back in place the guide bar to its original setup the way the scope. 41,727 likes · 1,739 talking about this · 869 were here. Zenithstar 73 III APO . The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. Wish List Compare. Add to Cart. 5mm spacer, but got elongated stars in the four corners. 9, 132mm at f/7, and 156mm at f/7. The three-element optical design features a 91mm aperture using FPL-53 glass. Adjust Distance for DSLR and Mirrorless Camera is 5. leaning towards the latter. The STM-coatings and superb quality provide excellent optical performance and unmatched value. 3" Rack & Pinion Focuser - Space Grey Version. 91 von 91 01. RotoLock Adapters; Camera / T-Mount Adapters; Mounting. Or fastest delivery Thu, Nov 16. The three-element optical design features a 91mm aperture using FPL-53 glass. 9 Triplet APO. All reactions: 155. . A. The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. 00. buy DETAILS. 03 Add to cart; Sale! New Cat Series Saddle Handle Bar ₹ 5,310. 00 Regular Price $1,998. 03%. FLAT6AIII special edition for Fluorostar 91 . Both of these scopes are triplets so you'll need a field flattener unlike the Petzval design of the Redcat series. Orange Bird Wildlife - RED Komodo 6K / WO Redcat 250mm F4. WANT! 2y. Free US shipping on orders over $25!Fluorostar 91 APO quantity. 9 Triplet Apo Refractor with Carry Case - Space Gr. 0. 20 Ricky Graham #. FOA-60 Ortho Apochromatic Refractor. Telescope Accessory - William Optics FLAT 6A III 0. Fax: +1-866-534-3097. 9 telescope has a retracted length of just 390mm (15. 00 My account / Register. WO FLT91 and Moonlite Focuser - posted in Refractors : Yeah, yeah! Go ahead and blame me for the beautiful weather. 00. The new William Optics Fluorostar FLT 91 is a three element air-spaced apochromatic refractor with a focal ratio of f/5. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. 00 Regular Price $1,998. Special thanks to Agena Astro for get. 25 inch RotoLock) 2019 All New Slide-base 50mm UniGuide Scope (with a Unique 1. Id like to think Ive come up to speed fairly quickly on. OTA Weight. FLAT6AIII special edition for Fluorostar 91. Download: free Website:. 4 Videos. The William Optics FLT 91 is the perfect apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. Pegasus Astro Indigo Filter Wheel (7 position, 2" or 50mm filters) 1 32. $2,494. William Optics Fluorostar 91 / FLT91 : Telescope or lens: 105: 949: William Optics Fluorostar 98 / FLT98 : Telescope or lens: 12: 87: William Optics Gran Turismo 102 (f/7. . 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. William Optics Fluorostar 91 / FLT91 Guiding Cameras ZWO ASI290MM Mini Acquisition details Dates: April 26, 2023 · April 27, 2023 Frames: IDAS GNB Galaxy Nebula Booster 2": 80. Lens Type: Apochromatic Triplet Prime Lens. 00. 9 APO Refractor features a three element triplet design and uses FPL-53 glass. 9 Focuser Dual Speed 3. 9 APO Triplet Refractor Telescope FPL-53 William Optics Fluorostar 91 FLT91 f/5. Business, Economics, and Finance. Rated 0 out of 5 $ 1,998. This is page 2 of 3. 0 mm in spacers and still the same problem. William Optics Fluorostar 91 (See my sig line) Astrophotagraphy. There's an initial grub screw to remove which will them expose the screws holding the gauge to the shaft. 72) Filter: Chroma 36mm HA 3nm Telescope Filter - Unmounted; Filters: ZWO Premium LRGB Imaging Filter Set - 36mm Round Unmounted (Used only RGB)Page 19 of 22 - WO Fluorostar 91 - new scope - posted in Refractors : Soon after I had purchased my 91mm I had added a 2nd WO Losmandy bar at the top, and then mounted the slide base for the guidecam on top of the dovetail. FLAT6AIII special edition for Fluorostar 91 . I ordered a William Optics FLT 91 Fluorostar 91mm f/5. During alignment of the star finder with a distant. . Qty. 00 Add to cart. Triplet Air spaced lens, TMB design, Triplet Air spaced lens, TMB. 40mm. 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. The 68III is at least twice as big and twice as heavy as the 6AIII. Coupled with my ZWO ASI1600 MM Pro, the field of view is 2. Qty. The three-element optical design features. Takahashi. Cave Nebula shot with a tandem rig using a WO FLT91 and ASI 2600 MM Pro for Luminance and Ha and a WO Z61 and ASI 2600 MM for RGB. Ken Bates. Adjust Distance for DSLR and Mirrorless Camera is 5. The new ones do not contain fluorite elements and I don’t know that older models ever did. 34 degrees X 1. 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. With a 540mm focal length and f/5. 00 - $2,897. The Esprit seems to be bullet proof (almost) but the Fluorostar has had some reports of poor focuser construction. But I will post it here as well to show my finish project of the NGC 1499 - California in SHO with 70 Hours of data. The STM-coatings and superb quality provide excellent optical performance and unmatched value. Everest Systems’ FLUOROSTAR TM color match roof coatings are a high gloss, single component, water-based, flexible PVDF fluoropolymer coating for spray applications that feature Kynar Aquatec ® technology for superior adhesion and unmatched colorfastness. Add to Cart. 9. Astrometry. CLOSED: Thanksgiving, Christmas Day, New Year's Day. Back Focus (WO Fluorostar 91 with FLAT6AIII Flattener and Fuji XT3) - posted in Beginning Deep Sky Imaging: Hi, I am somewhat new to astrophotography (this is my 1st post here) and struggling to understand how to achieve the right back focus, to calculate for the things in my imaging train that need to be accounted for. In stock. Fluorostar. Rated 0 out of 5 $ 1,998. 8x flattener hereAdd. The only issue is the threads on the FLT 91 are M92, the Flat6AII has M63 threads. 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. Cant imagine the 6AIII on the FLT132 with a M92-M63 adapter. Details. 1. 813. The Fluorostar’s connectivity functionalities help increase workflow efficiencies in any clinical applications. The red trim has grown on me, and my wife likes it. The three-element optical design features a 91mm aperture using FPL-53 glass that delivers high contrast colour-free images and an impressive 0. The Soul Nebula is home to a number of interesting objects, including the young open cluster of stars known as. Full size JPG: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. Add to Cart. TALK TO AN EXPERT :. The FLT 91 employs FPL-53 glass and has an optical design consisting of three elements. Hello everyone!In this video I will be going over the William Optics FLT91. 00. 35%. 99. add to list. Quick view Compare Add to Cart. EUR; GBP; Need Help? +62 812 7806 1789; About Us; Order Tracking; Contact UsTechnical details Telescope: William Optics Fluorostar 91 and Fla t6AIII focal reducer/flattener (fl=432 mm). 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. Then, put the bracket in place and use the M3 screws and washers in the spots where the others were just removed. Add to Cart. $284. FOA-60 Ortho Apochromatic Refractor. r/astrophotography • M101: Pinwheel galaxy featuring SN2023ixf (May 26th and 27th, bortle 7). 5) Reducer/Flattener: William Optics FLAT7A (624mm at F/5. 9 Doublet APO. / per. The three-element optical design features a 91 mm aperture using FPL53 glass. The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. 25" WA 1. ZWO EAF 4 42. Apochromatic Triplet Prime Lens. 3" R&P Focuser Image Circle : >43mm Retracted Length : 441 mm Extended Length : 51 Omm Dew Shield Circumference : 383mm Dew Shield Diameter . Unfortunately, I was not able to get the focus right. Specifications product. 9. William Optics heeft de flattener 6AIII geschikt gemaakt voor de FluoroStar 91 telescoop. You're reviewing: FLAT6AIII special edition for Fluorostar 91. 1 year warranty. Page 1 of 2 - William Optics Fluorostar 91 Focuser Issue - Response from WO themselves. 69 arc-seconds. I can only see that the WO has a better focuser (not too much) and a thermometer, other than. Download Manual. William Optics Fluorostar 91 0. Luminance 6 by 300 s. 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. Rated 0 out of 5 $ 1,698. Brands / Companies 910 ; Cameras 3302 ; Sensors 465 ; Telescopes & lenses 3721 . The three-element optical design features a 91mm aperture using FPL-53 glass. In stock. OK, I'm tempted by the FLT 91 I already have a WO 6A III 0. If your camera chip is too close or too far away, then the elements will not actually perform their intended corrections. I do however, use their instruments for astrophotography and so I was surprised. Add to Cart-23. As low as $114. Remove the temperature gauge off the telescope. - -10C cooled - Shot on April 26 and 27 night - 32 flats, darks, bias for each night Processing Details (PixInsight only):. 488 votes and 14 comments so far on Reddit84Pcs M6 x 8mm,12mm,16mm,20mm,30mm,40mm Hex Pan Head Cap Bolts Nuts Screws Assortment Set 304 Stainless Steel Allen Socket Drive Machine Screws with Wrench (84PCS M6 Hex Screws Nuts) 404. 00 Shane23 #. 99. 8 These are premium instruments primarily aimed at astrophotographers, but they can also be used for visual observations. 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. The STM-coatings and superb quality provide excellent optical performance and unmatched value. ln. $1,568. The focuser has smooth, precise reduction, a temperature display and a large adjustment range. not quite sure on the purpose, FLAT in the name makes me think it's a flattener? DSLR Attachment - William Optics 48mm T-Ring for Canon EOS - I'm guessing I need something else to complete connection to the telescope. The FRA500 has the built in flattener and no back focus issues. Mount: Sky-Watcher EQ6-R Pro (Used iOptron Tri-pier with Adapter 8036-TK)Telescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. 99. Not sure how much of the actual manufacturing they do, but they seem to design them. Fluorostar 91 APO Triplet Refractor. 65mm > 16. 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. The back focus is a critical spacing that must be obtained if one is using a Flattener or Reducer. 6M subscribers in the astrophotography community. 00.