8 These are premium instruments primarily aimed at astrophotographers, but they can also be used for visual observations. 00 ₹ 189,731. ر. An Avro Lancaster bomber built in Ontario by Victory Aircraft Ltd. William Optics. 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. 9. 00. Now Only $998. (FLT 132), 60 Mins Each of RGB (FLT 91) and 6 hours of Ha from my back yard. Page 9 of 23 - WO Fluorostar 91 - new scope - posted in Refractors : I was close pushing an ORDER button on this scope but now I started to hesitate. William Optics Fluorostar 120 - Red. 25" Accessories ZWO ASIAIR Plus · ZWO EAF · ZWO EFW 8 x 1. Wish List Compare. CryptoTelescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. As low as $171. Because of. 00. Add to Cart. I do however, use their instruments for astrophotography and so I was surprised by the general feedback regarding their newly released. 3″ Rack & Pinion Focuser ($2000) This is a good example of an APO refractor that is designed and packaged primarily for the Astrophotography market. Telescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. I hope this helps. 00 Original price. Lens Type: Apochromatic. 00. A-F151. AstroBin is an image hosting platform and social network for amateur astronomers and astrophotographers. 9. 9 and a focal length of 540mm. The three-element optical design features a 91mm aperture using FPL-53 glass that delivers high contrast colour-free images and an impressive 0. . “続いて> FLT-91鏡筒とセットでおすすめなのがフラットナーレデューサー”FLAT6AIII”. Be the first to review this product . 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. • Flexible installation for use on a variety of refractors, Newtonians, schmidt cassegrain and other Optical TubeWilliam Optics Fluorostar 91 / FLT91 Imaging Cameras QHYCCD QHY268 Pro M Mounts Software Bisque Paramount MX+ GEM Filters Chroma Blue 36 mm · Chroma Green 36 mm · Chroma H-alpha 3nm Bandpass 36 mm · Chroma Lum 36 mm · Chroma Red 36 mm Accessories William Optics Flat6A III SoftwareWilliam Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI2600MC Pro Mounts Celestron Advanced VX Filters Optolong L-eNhance 2" Accessories William Optics 0. 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. FLT-91 / Flat 68iii elongated stars? - posted in Experienced Deep Sky Imaging: First light on my W-O Fluorostar 91 / Flat 68iii, and could use some advice. pdf), Text File (. Horsehead Nebula in Narrow Band - posted in Experienced Deep Sky Imaging: Here is the Horesehead nebula, taken in narrow band with about 15hrs worth of data using the Fluorostar 91, ZWO2600MM Jump to contentHello all, I am finally reviewing my very own William Optics Gran Turismo 81, triplet apochromatic refractor! With a focal length of 478mm and a focal ratio. Download: free Website: Thingiverse. Shop Home / Accessories / Boltwood Cloud Sensor III Brand: Diffraction Limited Accessories Boltwood Cloud Sensor III. 5mm spacer, but got elongated stars in the four corners. Do you have a. DESCRIPTION The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence. The FLT 91 is the perfect apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. WILLIAM OPTICS FLT 110 APO f/7. 16, 2023 · Feb. Page 1 of 2 - William Optics Fluorostar 91 Focuser Issue - Response from WO themselves. Add to Wish List. There's an initial grub screw to remove which will them expose the screws holding the gauge to the shaft. Those look so nice. Filter: Antlia 36mm OIII 3nm Narrowband Filter -. Telescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. Hot. Fluorostar 91 APO. add to list Tags Pegasus Astro Powerbox Advance. The FLT 91 employs FPL-53 glass and has an optical design consisting of three elements. William Optics Fluorostar Series: Optolong L-Ultimate filter: ZWO ASI 2600MC PRO: ZWO AM5: In these collections OSC About. William Optics Fluorostar 91 Triplet APO Refractor Technical Specifications. 95+ Strehl Ratio. 00. 【Refurbished】Fluorostar 91 APO-Red . 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. The W-O documentation is pretty sparse (!), but their Flat 68iii page shows the back focus adjustment for a DSLR to be “5 mm (need additional adapter)”. 8x reducer is almost identical FOV as the Zenithstar was, but gathers more light and faster, and the Zenithstar was not as good as the Redcat anyway. 00. 00. 9 and a focal length of 540mm. 9 APO Triplet Refractor Telescope FPL-53. William Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI2600MC Pro Mounts Sky-Watcher EQ6-R Pro Acquisition details Dates: Nov. You may remember my review of the William Optics Zenithstar 61 APO, which also used this glass. January 18, 2023. Aperture. OpticsPlanet, Inc is an Authorized US Distributor for William Optics Telescopes. . . Quick view Compare Choose Options. The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. The nose and cockpit section of FM104. The tube weighs just 3. I would really appreciate any comments that my help with making choice from those that have had some experience with either scope or either. It can with the visual extension attached which is 3-4 inches long I didnt know it had to be removed before attaching the flattened. 8. 00. Write Your Own Review. Store in a dry place: Store the telescope in a. 9 & GH5. 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. The STM-coatings and superb quality provide excellent optical performance and unmatched value. 25 inch RotoLock) All new, a unique, RotoLock high-quality fully multi coated WO 50mm f/4 Guiding scope that fits. 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. Add to Cart. Now Only $1,498. Astronomers desirous of superb visual and photographic intermediate sized refractor performance will much appreciate the William Optics 91 mm f/5. Glass is the same, but you can pay extra for the report on the WO. Hot. Astronomers desirous of superb visual and photographic intermediate sized refractor performance will much appreciate the William Optics 91 mm f/5. The FRA is also a natural f/5. 9 Focuser : 3. Combined with the Flat7A flattener by William Optics, it produces a fast aperture ratio of f/5. For fun I want to have a double star shoot out with my trusty old 90 mm F10 SW achromat. 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. I have since added another 1. Qty. Its always a shame to take off the visual back on these. 00 Shane23 #. Add to Cart. 3" R&P Focuser. The eccentricity plot has a weird looking, but it's rather uniform, from 0. Add to Cart. / NINA) Guiding Telescopes Or. Rated 0 out of 5 $ 1,698. Wish List Compare. . William Optics. The new ones do not contain fluorite elements and I don’t know that older models ever did. Free shipping. This is a top of line material used in only the finest refractor telescopes. I ordered a William Optics FLT 91 Fluorostar 91mm f/5. 86 shipping. To me, it looks like the scope for observers and imagers who want go greater than four inches but cannot afford the FLT 132 cost and weight but want something bigger than the FLT 91 and sticking with William Optics for the colors build quality. 00-425212-01. Add to Cart. As low as $3,298. 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. 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. Wish List Compare. All New Adjustable Flat6AIII with M92 thread adapter for use with the new WO FLT91 telescope (M48-threaded T-mount not included). 25" · Antlia Red 1. Qty. FLAT6AIII special edition for Fluorostar 91. 9 Imaging APO Triplet Refractor FPL-53 ProAstroz William Optics Fluorostar FLT91 f/5. Sort By. Apochromatic Triplet Prime Lens. The focuser has smooth, precise reduction, a temperature display and a large adjustment range. Page 11 of 23 - WO Fluorostar 91 - new scope - posted in Refractors : Thats with the WO reducer for this scope and a QHY268. Adapters. 58 to 0. The STM-coatings and superb quality provide excellent optical performance and unmatched value. The three-element optical design features a 91mm aperture using FPL-53 glass. Fluorostar Series 1 Product; CAT Series 4 Products; Video Demonstration. • Can be used in both autofocus and manual modes. 焦点距離はx0. 00 Regular Price $1,998. In stock. Mount: Sky watcher EQ6R-pro. 03 Add to cart; Sale! New Cat Series Saddle Handle Bar ₹ 5,310. Service_manual_GE_OEC_Fluorostar_7900. Seems like an unreleased scope with their new internal focus system. 61 pixel). Put the correct sized flex coupler on the exposed shaft and tighten the grub screws down through the hole created by the grub screw removed earlier. High-Quality Refractor Telescopes, Binoculars, Eyepieces, Diagonals and other Optical Accessories. William Optics Fluorostar 91 with FLAT6AIII special edition : $2500: 2023-10-06 12:09:57: Innisfil, ON: 71163: For Sale: Active: Takahashi TSA-120 with Feather touch focuser- mint reduced-. add to list. Page 4 of 23 - WO Fluorostar 91 - new scope - posted in Refractors : Seems like there is a pretty large shipping fee to. 4. FLAT6AIII special edition for Fluorostar 91 . 4 Videos. Fluorostar 120. The three. Fluorostar is a water-based and ultra-thin film roof coating formulated with Kynar Aquatec®, a world. This very elegant 2" reducer/field flattener has been designed to optimize the flat-f. The three-element optical design features a 91mm aperture using FPL-53 glass. 9, 132mm at f/7, and 156mm at f/7. 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. Adjust Distance for DSLR and Mirrorless Camera is 5. It is similar to the Gran Turismo series, and at present it comes in apertures of 91mm at f/5. April 14, 2023. Adjustable reducer flattener Flat61R for Z61 . We would like to show you a description here but the site won’t allow us. The three-element optical design features a 91mm aperture using FPL-53 glass. TALK TO AN EXPERT : 919833974700. 9 Triplet Apo Refractor. 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. 8 These are premium instruments primarily aimed at astrophotographers, but they can also be used for visual observations. Filter: Chroma 36mm HA 3nm Telescope Filter - Unmounted. Lens Type Apochromatic Triplet Prime Lens Focal Length 540mm Diameter 91mmFluorostar 91. 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. 5") 1,998: William Optics Gran Turismo 71 APO Refractor: Triplet Refractor: 71 mm (2. Download Manual. $293. William Optics offers another model of apochromatic triplet refractor, the Fluorostar. More Information;107 votes, 11 comments. The three-element optical design features. 6lbs) including tube rings and dovetail plate. 1mm from the back of the flat to the camera chip. Pending edit 1; Mounts 604 ; Filters 2231 ; Accessories 1396 ;Language: English. AT125EDL- $1650 and only a doublet, but with good glass . Wish List Compare. High-Quality Refractor Telescopes, Binoculars, Eyepieces, Diagonals and other Optical Accessories. 99. 00. 00. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. SH2-91. 06 pixels is 2. Mounting Rings;Business, Economics, and Finance. William Optics Fluorostar 91 APO - Gold. As low as $1,568. I do however, use their instruments for astrophotography and so I was surprised. William Optics Fluorostar 91 — Combines a compact design with remarkable imaging capabilities. Wish List Compare 【Refurbished】Gran Turismo 81 IV-Space Grey . WO Gran Turismo 81 . Quickly record images in a ready-to-use format. 9 Focuser : 3. The Esprit seems to be bullet proof (almost) but the Fluorostar has had some reports of poor focuser construction. View full description. Wish List Compare. 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. Not managed to use my new FLT 91 yet, still waiting to source a Skywatcher EQ6 R Pro mount. T-FLT-91. Sale Regular price $1,998. The three-element optical. The three. 3" Rack & Pinion Focuser - Space Grey Version. $2,697. 35%. William Optics. William Optics. A 300 f/2. Hey, Brian, FWIW, I'd avoid the FLT 91. $284. Fluorostar 91 SKU: T-FLT-91RD-RP33 . If you have any questions about my experience with the William Optics FLT 91. The back focus started at 60mm which is the required distance when using the Williams Optics FLT 91 with the FLAT6AIII, I have a filter in the image train so I added a 0. txt) or read online for free. Special Edition FLAT6AIII Adjustable Reducer / Flattener for William Optics Fluorostar FLT 91 Telescopes. SKU. buy DETAILS. Canon EF, RF Nikon F, Z Sony E Pentax K Micro Four Thirds (M4/3) FUJI X. 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. 4mm This William Optics 2" Field Flattener and Reducer has been designed to optimize the flat-field iMost of their scopes don't appear to have counterparts with any other manufacturer. Putting the motor in place should be obvious at this point. 00. Optional. 180. Was wondering what people thought of them. doc 3Version 1. 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. Diameter. "high performance and looks good doing it, versatility, manageability, afforfability: a better balance than anyone has a right to expect". And attached is a FWHM-Eccentricity analysis of the luminance data. Regular price $1,998 3 in stock View. Add to Cart ₹ 23700 + 18% GST FLAT6AIII Special Edition. FLAT6AIII special edition for Fluorostar 91. Ele também contém informações de Referência técnica. Started by mewmartigan , Sep 09 2020 06:02 AM «. The three-element optical design features a 91mm aperture using FPL-53 glass. Add to Cart. I can only say that Esprit owners seem well satisfied and and the same is true of Willams Optics scope owners. Brand: William Optics . 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. 1) William Optics Fluorostar + CEM70G 2) Esprit 150ED and EQ8-R The price difference is about 2k (Euros). 9) Flattener/Reducer: FLAT6AIII special edition for Fluorostar 91 (432 mm at f/4. 8 These are premium instruments primarily aimed at astrophotographers, but they can also be used for visual observations. 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. Fluorostar 91. 00. Broad band images were taken from a Bortle 3 site in Sand Point Michigan while the Ha was shot from my backyard (Bortle 7). 72) Filter: Chroma 36mm HA 3nm Telescope Filter - Unmounted. Just ordered a Space Gray William Optics FLT 91 Fluoro Star 91mm f/5. 2019 All New Slide-base 50mm UniGuide Scope (with a Unique 1. Has anyone ever put a ZWO EAF on a William Optics Fluorostar 91?William Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI2600MC Pro Mounts Sky-Watcher EQ6-R Pro Acquisition details Dates: Nov. The Fluorostar 120 is a Three Element Designed APO refractor. I found a great deal on a used William Optic Fluorostar 91 APO with the. 72) Filter: Chroma 36mm SII 3nm Telescope Filter - Unmounted. Telescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. · 157 views I can use another set of eyes on this issue I'm running into. SKU. 00 Dennis Spender #. Adjust Distance for DSLR and Mirrorless Camera is 5. 8x reducer (6Aiii), you must be 62. item 4 William Optics Fluorostar 91 FLT91 f/5. The three-element optical design features. 9 Triplet APO. $1,881. 24 +$12. 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. Filter: Chroma 36mm OIII 3nm Telescope Filter - Unmounted. The William Optics Fluorostar 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. 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. Dual Speed 3. Its a nice scope, but its too large to carry in my truck. Price jumps out as the obvious difference $3210 vs $1999 though availability and color might be a consideration. The three-element optical design features a 91mm aperture using FPL-53 glass. An Apochromatic triplet refractor for visual astronomers and astrophotographers who want very high performance from a midsize telescope. 9 Triplet Apo Refractor with Carry Case - Red # T-. The WO being only a triplet would not be flat across the entire field. The thing you can immediately notice is the smaller overall FWHM (2. I recently acquired the William Optics Fluorostar 91 as both a visual and imaging telescope. Sale price. As low as $1,998. As low as $933. 00. Telescope/Lens: William Optics Fluorostar 91 (540 mm at f/5. William Optics Fluorostar 91 Triplet APO Refractor Telescope with 3. The FRA is also a natural f/5. The three-element optical design features a 91mm aperture using FPL-53 glass. I recently removed the dovetail on top and put back in place the guide bar to its original setup the way the scope. The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. The STM-coatings and superb quality provide excellent optical performance and unmatched value. Wish List Compare 【Refurbished】Zenithstar 73 III APO-Red. SWAN 2" SWAN 1. 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. Fluorostar 91 APO Triplet Refractor. Add to Cart. This will be handy if you also are going to install a Electronic Automatic Focus (EAF) controller which sometimes will prevent you from. Quick view Compare Add to Cart. 5mm spacer, but got elongated stars in the four corners. William Optics Fluorostar 91mm. 00. Utilizing FPL-53 synthetic fluorite glass with STM coatings, this. $293. / per. Release Date 08/19/2015 11:49:39 AM. 00. 38 comments. William Optics Gran Turismo 81 f/5. Shop William Optics FluoroStar 110 mm ED Triplet f/7 APO Refractor Telescope | Be The First To Review William Optics. 9. 9 aperture, this Fluorostar model strikes a balance between a wide field of view and detailed imagery, ideal for casual, serious stargazers and wide field imagers. 8x Reducer / Adjustable Field Flattener 6AIII for FLT 91 (432 mm at f/4. All reactions: 155. 00 Regular Price $1,568. That, or purchase a new. Other suggestions welcomed. • Precise focus control for planetary and deep sky imaging. Zillow has 23383 homes for sale in British Columbia. Focal Length. The three. SKU. 00. Add to Cart-23. I ordered a William Optics FLT 91 Fluorostar 91mm f/5. 8 Reducer. 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. 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). Be the first to review this product . Wish List Compare. The William Optics FLT 91 is the perfect apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. Despite being only a little longer, that diameter and extra glass means this is much heavier than my Z73. Page 1 of 2 - Askar FRA500 vs the WO FLT 91 - posted in Refractors : Looking at these two scopes. Wish List Compare. → Equipment Discussions. 1 81bs / 4. Wish List Compare 【Refurbished】Gran Turismo 81 IV-Space Grey . William Optics Fluorostar 91 / FLT91 Imaging Cameras ZWO ASI294MC Mounts Sky-Watcher EQ6-R Pro Accessories William Optics Flat6A III · ZWO ASIAIR Plus Software Pleiades Astrophoto PixInsight Guiding Telescopes Or Lenses William Optics UniGuide 50 Guiding Cameras ZWO ASI120MM MiniDisponible nuevamente en Stock, William Optics FluoroStar 91 ! North Optics · November 8, 2021 · November 8, 2021 ·M48 has at least 80 members, including three giant stars of spectral types G to K. 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. Now Only $1,398. Qty. 25" WA 1. Fluorostar 91 APO Triplet Refractor. 95+ Strehl. William Optics heeft de flattener 6AIII geschikt gemaakt voor de FluoroStar 91 telescoop. Remove the temperature gauge off the telescope. The red trim has grown on me, and my wife likes it. 2y. 3" Rack & Pinion Focuser - Specify Color. FLT-91 / Flat 68iii elongated stars? - posted in Experienced Deep Sky Imaging: First light on my W-O Fluorostar 91 / Flat 68iii, and could use some advice. Fluorostar is a water-based and ultra-thin film roof coating formulated with Kynar Aquatec ®, a world renowned. 0 mm in spacers and still the same problem. With a 3-element triplet design and FPL-53 glass, this William Optics 91 mm f/5. Like. 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. It is similar to the Gran Turismo series, and at present it comes in apertures of 91mm at f/5. Im excited. 00. Designed to. In Stock. I have question for any owners of this scope who may have a Moonlite focuser. I can only see that the WO has a better focuser (not too much) and a thermometer, other than. The three-element optical design features a 91 mm aperture using FPL53 glass. . 8x flattener hereAdd. Swap to the smaller Allen key and with a torch find the two screws at 45 degrees so just rotate the focus adjuster to see them. Deutsch; Français; Espanol; Currency: USD. Back In Stock! RedCat 71 APO 350mm f/4. 00. The STM coatings and superb quality provide excellent optical performance and unmatched value. Wish List Compare. William Optics.