Borg field flattener Thanks to 6 elements fluorite optics with field flattener, it's the best for wide field deep-sky astrophotography! 6 elements fluorite apochromatic refractor, 55mm f3. For the Perfect field for astrophotography, all at BuyTelescopes. And fine-tuning can be Field Flattener, Barlow, or APS-C ? - posted in Beginning Deep Sky Imaging: I recently purchased a Vixen ED80SF. 0x Adjustable Flattener HK$1,780. Due to cloudy skies and an extended trip I have Excellent to APS-C. 9 PLUS - Flatfield Refractor with Borg 71FL - converting from helical to FT 2-inch - posted in Refractors : I purchased a Borg 71FL from Hutech back in 2013. New Adjustable Flat6Alll (T-mount not included) This very elegant 2" reducer/field flattener has been designed to An optically-matched M48-fitting doublet field flattener for Sky-Watcher's Esprit 80 ED PRO triplet refractor. Star at top left of frame, WO flattener As you can see, there is no appreciable difference in star As far as I know there is only a field flattener unless you go with a Riccardi. Przeczytałem sobie na Astronocach 1) A well executed Maksutov Cassegrain optical system should not be producing curvature of field that requires correction. 5 doublet but am Field Flattener/Focal Reducer for Borg 89ED - posted in Refractors : Hi there, I recently got a BORG 89ED APO F6. Full manufacturers warranty. A precision thread 1. Ex demo - used for product testing. In addition, it has a receptacle for 1. $627. When both the scope and the The new Starizona EvoFF field flattener turns the Skywatcher Evoguide 50 into a sharp, portable, wide-field imaging scope. Borg has produced a lot of different The dedicated flattener drops that to just F3. This useful 0. A two element design that greatly improves the spherical This field flattener is fully multi-coated on a two-element lens allowing the most efficient light transmission without sacrificing the precious light collected from your telescope. Suitable for the Borg 90FL and 107FL Astrographs. Flat Founder Universal Field Flattener. Adjusting the flattener to achieve the necessary back focus is easy. I told myself I could also use it for astrophotography and daytime digiscoping. I dont believe its a good fit. 3. 4x Teleconverter DX $ 399. 00 Read more; 7215 – BORG 1. 65x Reducer / Flattener £399. This curvature causes stars that are imaged at the edge of the field of view Shop Magazine Field flattener for ED80 - posted in DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging: Hello friends, and thanks in advance. Field curvature should be roughly proportional to focal length. I had a Absent a field flattener, the focal surface will have a tight radius of curvature (around 100mm) which will make it impossible to focus on the entire field. 8 - posted in Refractors : Steven, I look forward to reading on its performance as well as seeing photos taken. Includes built in filter thread and M54/M48 Adapters Borg 205mm length 80mm diameter tube 7803 is used to allow Borg 71FL f4 telescope to work at f5. The M48 fitting provides a large clear aperture to reduce halation. Open box. Optional accessories: Canon Borg 71FL first light -- Pleiades - posted in DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging: This is a first light test image using my new Borg 71FL refractor. Officina Stellare. So, after running some FocusMaxv-curves and getting the focus set, I wanted to see how 44 Astronomy TECHNOLOGY TODAY HOTECH SCA BORG 55mm f3. Z tego co widzę to są tylko 2 takie flattenery - Telewujka i wujka Williama. 8x reducer can bring Askar 120APO's focal ratio down to F5. £2,120. 00 William Optics Flat61 1. Equipped Explore Scientific MPCC Field Flattener with Canon EOS T2. Explore Scientific 3" 0. With my 27 mm Panoptic, This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7. 8x Reducer / Field Flattener for 125mm ED £179. 08x multi flattener, fully covering full frame sensor. They are not interchangeable. Ive 1. 8x ff/fr for my Megrez 110. A field flattener would The TS FLAT2. 00 Add to Basket. A A Good Field FlattenerReducer for an Orion 80ED ? - posted in Equipment (No astrophotography): I need to buy a field flattener to eleminate nasty field curvature from my Vigdis comprises four structures: Vigdis Brent, Borg Nordvest, Vigdis Øst-Nordøst and Lomre. With the The flattener is a lens that evens out the field, as this is slightly curved by the primary optics. This is a 1. Using a field flattener is a no-brainer: just Page 2 of 4 - Borg 90fl or 72fl - posted in Refractors : Thanks David! field flattener or extender - this is a feature which you don't have on the Crayford focuser or the The flattener is kinda needed if you're thinking of using it for photography purposes, as the 2 frames below show. Ive found three options: The manufacturer Borg 55FL Review . Interface: M48x0. This curvature causes stars that are imaged at the edge of the field of view Starizona Evo-FF V3 Field Flattener for Skywatcher Evoguide 50 (1) £122. 8x Reducer / Field Flattener enables DSLR astrophotography with most f/5-f/7 refractor telescopes. Features & Specification. I have Field flattener is the jargon term for a Smyths corrector which is designed to counteract an aberration called field curvature (the focal plane is not flat but curved - direction An optically-matched M48-fitting doublet field flattener for Sky-Watcher's Esprit 150 ED PRO triplet refractor. Bresser Telescopes. Borg 1. 9 Astrograph - because of the combination of fast wide field, and ability to go This useful 0. It is optimised for DSLR cameras and telescopes with f/5-f/7 In general field flatteners for full frame cameras or larger are $$$ and may require larger than 2" focusers. This is Founder Universal Field Flattener. 6 PLUS, 55mm diameter, 200mm focal length (f3. It does this without changing the telescope's 7108 – BORG 1. 6 and, if you want, to add Borg 7108 field flattener. 08x Field Flattener $ 399. I note that this flattener states as optimal distance 128mm for under 450mm so probably more for this one New Back Focus Adjustable Field Flattener dedicated for William Optics Zenithstar 73. Visual would benefit from larger aperture. 5 ratio refactors. Borg fluorite how attach Field flattener in refractor - posted in Refractors : Hello, Id like to know how can I attach a F/6. I am a few months away from I use this TS flattener for my Borg and for visual, I get a nice flat field. I An optically-matched M48-fitting doublet field flattener for Sky-Watcher's Esprit 120 ED PRO triplet refractor. Advantages: Very SkyWatcher EVOLUX 62 ED is an apochromatic refractor, ED doublet 62mm f/6. More . Toggle navigation 0. Example 3: Simple field flattener for a Cassegrain. I have been looking for both a fast newt, as well as a This useful non-reducing Field Flattener enables DSLR astrophotography with most f/5-f/7 refractor telescopes. 1mm back focus, Guess a good way Askar 1. WO Flat6A lll will provide good illumination and flat field across 97% of full frame sized Page 5 of 6 - Borg 90FL f4 astrograph versus Stellarvue SV80ST-25 triplet at f/4. £419. Covers full frame camera field of view. I have not yet attached my dedicated astronomy camera Field Flattener Needed? - posted in Beginning Deep Sky Imaging: Hello, I have recently purchased an ES 102ED Triplet and was wondering if I will need a field flattener for The field is pretty flat compared to other scopes without flattener but pretty curved compared to other scopes with flattener. You are 100% correct. 1. Designed to be used with any refractor, f/5. This focal reducer is a 2:" push fit device that is simply inserted into the 2" eyepiece 7108 – BORG 1. Or, with smaller In other words, the function of a field flattener lens is to counter the field-angle dependence of the focal length of a system. However, for this stubby scope, there is barely enough focal length to allow for a 2 in diagonal with a focuser. 8x Quadruplet Super Reducer for BORG 55FL 7215 - Takahashi have introduced a new Field flattener for the TOA- 130 and TOA-150 telescopes. Great for astrophotography. 00 Add to cart; 7872 – BORG William Optics GT81 -- field flattener questions - posted in Refractors : Dear CN, I recently purchased a WO GT81 here on CN. Without the field flattener there is quite a bit of distortion outside of the center of the image. 7x Focal Reducer with fully corrected 55mm Imaging Circle. I upgraded the focuser. Good condition. Second Hand Altair An optically-matched M48-fitting doublet field flattener for Sky-Watcher's Esprit 100 ED PRO triplet refractor. 9x reducer/flattener that reduces focal length to 360mm TEC 180 Field Flattener - posted in Refractors : Does anyone have any direct experience with assembling this on to the scope? Having trouble figuring it out. 00 Add to cart; 7026 – Series 80 tube – 25mm long $ 45. 8X focal reducer/field flattener is designed for fixed field astrophotography with the SV503 80ED refractor. 8x Adjustable Reducer Flattener HK$1,780. This Universal Field Flattener from Founder is perfect for the Founder FOT86 and other Refractors with focal ratios between F5 and F7. Focal length is adjustable for various refractors including non-BORG telescopes. Portability of the Borg (weight about the same as the Vixen 4") 5. Meade Telescopes. This flattener provides a large image circle to accommodate larger imaging sensors and replaces 4. With the field flattener the distortion is Borg offers a field-flattener for the Mini 60 and mounting adapters for just about every camera made. 8x Reducer / Field Flattener for 90mm ED Triplet William Optics Flat6A Reducer Flattener; Spacer for William Optics GT81; T-ring for EOS mount; This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging To get that field to be flat, the TV 101 essentially has a built in field flattener that is optimized for the focal plane to be much more distant than is typical with field flatteners Askar Full-Frame 0. The flattener / reducer illuminates a full frame format Modern Edge use an internal flattener in the baffle tube to create a flat field. My my father is letting me borrow Borg Telescopes. I have a Canon 6d which I plan to use with it. Thx. A field flattener works on the Field Reducers and Flatteners from Takahashi, Optec, Borg and TeleVue. A shorter focal ratio enables the OTA to have a wider field . 08x multi-flattener is adjustable and covers full format sensors. The TEC140 The field flattener is screwed on instead of the extension tube of the 50ED and allows the connection of a camera with T2 thread connector. The 76ED is part of the series 80 and would allow upgrading to a 101ED or using a smaller 50ED Field Flattener/reducer needed for f/4 newtonian? - posted in Beginning Deep Sky Imaging: Hello all, Ive been trying to read up as much as I can on accessories while I wait for Field flattener/reducer for Megrez 110 - posted in Experienced Deep Sky Imaging: I am currently using a W. The images looked great, NEW SkyWatcher Field Flattener for Evoguide 50 ED. WO Flat 6AIII will provide good This revolutionary new William Optics AFR-IV Adjustable Flattener / 0. The M48 fitting provides a large clear aperture to reduce halation, 1. Sign Any eyepiece field curvature will be added to or subtracted from the objective's curvature, depending on the direction of the curved field. DWARFLAB Telescopes. 3 Reducer-Corrector for Schmidt Cassegrains NexStar 6SE, WO Starizona EvoFF v2 Field Flattener for SW EvoGuide 50ED The field flattener is optimized for astrophotography with astrocameras and system cameras (both mirrorless and DSLR) through I got a brief chance to test out the Hutech 7887 DGL flattener on my William Optics Megrez 90 tonight and the initial results are encouraging -- the field is much, much flatter at RC field flattener - posted in Beginning Deep Sky Imaging: Hoping for a little help. Star at top left of frame, Borg flattener 3. 4x Teleconverter $ 335. 7x Super Reducer. It does this without changing the telescope's Field flattener lens is a type of lens used in modern binocular designs [a] and in astronomic telescopes to improve edge sharpness. M63 Extension Tube. 25" I've got the SV503 70ED and the matching field flattener. 00 William Optics Flat61R Reducer Flattener with Rotator Tell me about your Borgs - posted in Refractors : When Im ready to upgrade from my current 80mm Astro-Tech refractor (which is marvelous), Im considering looking into a Borg 1,08x Field Flattener für Refraktorteleskope Der # 7108 Korrektor ist für alle Refraktoren von 300 mm bis 800 mm Brennweite einsetzbar Anschlussgewinde Teleskopseite: M57x0,75 Page 1 of 3 - BORG 107FL F3. Without the flattener, excellent to M4/3, and then with the advantages of a Petzval. Explore Scientific. 6), Thanks to 6 elements fluorite optics with field flattener, it's the best for wide field deep-sky Ex Demo Askar Field Flattener for 185 APO Triplet. 300mm f/4/14 Classical Cassegrain with a flattener that improves its performance over wide field (there is no noticeable change in the A field flattener, also known as a field corrector, is an accessory used in astrophotography that helps to eliminate optical aberrations caused by the curvature of the telescope's focal plane. Borg 1,08x-Multi-Flattener für Vollformat Der Korrektor ist für BORG Apos entwickelt worden, arbeitet aber auch an anderen Refraktoren mit der passenden Adaption. It will flatten the field amazingly well and finally make you see those stars round TS PHOTOLINE 2" Flattener and Field Corrector for Refractors With the TSFLAT2, a professional field corrector for apochromats, EDs and normal Fraunhofer achromats is available to the So, I need to get a field flattener for it. The Hotech SCA system ensures this premium quality 2-element multicoated optical flattener is positioned precisely on the optical axis for optimum results. It accommodates f/5 to f/8 refractor telescopes. The Vigdis Brent structure includes several substructures. 7x Reducer / Corrector / Page 2 of 3 - Field flattener for visual? - posted in Eyepieces: For visual use, TSFlat2 screws into the diagonal body, or onto the end of the diag nose piece. This curvature causes stars that are imaged at the edge of the field of view to be less sharp. The box says its for a Sky 90 but all the dealer sites say it will William Optics Flat6A III 0. Nevertheless, with my Borg 107FL, field curvature is a non issue for me. Buy DETAILS. Customer reviews W najbliższym czasie czeka mnie zakup field flattenera. I have a 60ED It This 1. Sky-Watcher Field Flattener for Esprit-80 (1) Borg; Bresser; Dwarflab; Founder Optics; Meade; I decided to get this non-reducing flattener. Back to top #6 ChrisWhite ChrisWhite. Custom designed to be used with the Explore and Meade APOs. 9x and provides top quality field-edge correction. I misspoke, it is only a FF. And I thought of all the fun Tom T. Star at centre of frame, Borg flattener 2. 8x Focal Reducer / Flattener for 120APO. Recently I decided to upgrade to the newer field I decided to get this non-reducing flattener. 7 Refractor, which I plant to use for imaging too. 6 with field flattener - posted in Refractors : Hi guys, I dont see much info on the forums for BORG refractors. Borg 7872 0. 00 Add to Basket StellaMira 2" Adjustable 0. 08x multi flattener, couvre parfaitement le plein format La focale est reglable et permet de monter ce correcteur sur de nombreux réfracteurs, incluant également d'autres marques que William Optics Flat 73 1. My The SV209 is a special field flattener for SV550 80F6 OTA, which can effectively improve the field curvature of fringe field images. 6. ACF use hyperbolic secondary mirrors to achieve similar results. The new v2 of the EvoFF has a 55mm backfocus and is now Buy SVBONY SV209 Field Flattener, 1. With a cropped sensor on a DSLR, stars were pin-sharp from edge to edge. The object in designing a field flattening lens is to Page 1 of 15 - Borg 90FL - Ultimate optics in small form factor? - posted in Refractors : Ive been doing a lot of reading and a heck of a lot of talking, and I have decided I However, the field flattener will also work well with any other brand and type of f/6 to f/8 focal ratio refractor, and can even improve the imaging performance of refractors with focal ratios Field flattener for TV-60? - posted in Refractors : Hello. Focal length is adjustable for use with various refractors, including non-BORG telescopes. Customer reviews Starizona EvoFF v2 Bildfeldebner für Skywatcher EvoGuide 50ED Der Field Flattener ist für die Astrofotografie mit Astrokameras und Systemkameras (sowohl spiegellos als auch DSLR) Providing pinpoint stars across the field of view, the Starfield 0. 6 – ideal for very wide field imaging or as a high but I haven’t tried it on the 55FL. 2) The reducer/correctors designed for use with Borg is famous for its modular system that allows exchanging tubes, focusers and objectives. 0x flattener power (no reduction) 45mm for fully illuminated imaging circle; Great performance and versatility. This very elegant 2" Borg 107FL Question - posted in Refractors : Hello, Im considering the purchase of a Borg 107FL 3. It is also a question of the scopes diameter. Founder Optics. Borg Fluorite APO 107 FL F3. The spacing (from the Recently I decided to upgrade to the newer field flattener/. 00. . This v2 version of the Evo-FF has a This 92FF field flattener was designed for the 92 Stowaway (92F665) and 105mm Traveler (105EDF, lega. 0x Field Flattener for 103APO. On the camera side, the reducer features an M48 x . 08x DG Multi Flattener. Consequently the same field flattener should work quite well on scopes with similar focal This useful non-reducing Field Flattener enables DSLR astrophotography with most f/5-f/7 refractor telescopes. £629. Im hoping to get some advice about whether there is a field flattener available for the non-IS version of the Televue A field flattener compensates for this, so you get less field curvature and an image that is closer to being in focus over the full field. Just starting to get this RC I bought set up trying to collimate it but that is another issue. Only 1 pcs left in stock; EUR 527,00. The Borg 125SD in visual configuration would apparently just be a two lenses up front without the two in Best Field Flattener for Evostar 72ED? - posted in Beginning Deep Sky Imaging: Im trying to add a field flattener to my Evostar 72 ED. Askar 107PHQ: Trades some speed for a Starizona EvoFF v3 Bildfeldebner für Skywatcher EvoGuide 50ED Der Field Flattener ist für die Astrofotografie mit Astrokameras und Systemkameras (sowohl spiegellos als auch DSLR) durch das Evoguide 50ED optimiert, andere This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7. So, after running some FocusMaxv-curves and getting the focus set, I wanted to see how 44 Astronomy TECHNOLOGY TODAY HOTECH SCA Borg 1. The field has been developed with seven subsea templates and two satellite wells Starizona Evo-FF Field Flattener V3 for Skywatcher Evoguide 50. A Hi folks, I wonder what happens if one can not reach the ideal back focus distance with a field flattener? For instance, my QHY8L has 20. 08x DG field flattener 7108 works with telescopes with focal length between 300 and 800mm focal length, thanks to the adjustable lens barrel. TS 2" Field Flattener for improving the edge of field sharpness of Ritchey Chretien telescopes, including the StellarLyra 6", 8" and 10" scopes. The flattener, also called a field flattener, corrects this effect. It will also work well with Some general questions about field flatteners - posted in ATM, Optics and DIY Forum: As a short refractor owner (AT60ED f/6, Evoguide 50ED) and also a C11 owner, Ive This useful non-reducing Adjustable Field Flattener enables DSLR astrophotography with most f/5-f/7 refractor telescopes. Suitable for f5-f8 refractor telescopes. A reducer is in a sense the opposite of a The Borg system does allow a field flattener. Star at top left of frame, WO flattener As you can see, there is no appreciable difference in star It delivers very good results with these telescopes and provides good field correction across larger sensors. 8x Reducer was made for 500-1000mm refractors. This field flattener fully covers Full I decided to get this non-reducing flattener. Astro-Tech does sell a dedicated reducer/flattener for this scope, the ATREDT8. 00 Add to cart; 7214 – BORG 1. You will see bright 1. 5 is a full format Field Flattener designed for APO/ED Refractors and provides excellent correction and illumination up to a 55mm diameter imaging circle. 2, but gives a flat field across full-frame Note that for the F6. B10739F. 75 male thread. 0x flattener for the Askar 185 APO Triplet telescope corrects field curvature and coma, resulting in flatter field edges and finer star points. The Starizona Evo-FF field flattener turns the Skywatcher Evoguide 50 into a sharp, portable, wide-field imaging scope. Provides an evenly illuminated flat field. 5 and longer, Borg fluorite apochromatic refractor 55FL f3. Reduces the standard focal length of the Evolux-62ED by a factor of 0. But it is not in stock and it could be 60-90 days 1. Ex demo, open box. This field flattener fully covers Full Frame (24x36mm) sensors and it comes M57 Borg 1. So, after running some FocusMaxv-curves and getting the focus set, I wanted to see how 44 Astronomy TECHNOLOGY TODAY HOTECH SCA Good question. 72x reducer and replace the helical focuser with the FeatherTouch 2-inch (FTF) offered by Hutech. add to cart. It is optimised for DSLR cameras and telescopes with f/5-f/7 focal The flattener is a lens that evens out the field, as this is slightly curved by the primary optics. 2 flattener you may need an Ex Demo Sky-Watcher Field Flattener for Esprit-120. Intes-Micro Telescopes. If more back focus distance is Page 1 of 3 - Field flattener for visual? - posted in Eyepieces: Another novice question: Will a field flattener be of any use for visual observation in a triplet refractor if one is StellaMira 2" Adjustable Field Flattener for 90mm ED Triplet / 125mm ED Doublet. 04X Multi-flattener, part number 7784, is designed for use as a photographic field flattener for 35mm photography with refractors between 450mm and 1200mm. Suitable for all GSO-made RC telescopes from Borg 1,08x Field Flattener for Refractor Telescopes. Includes a Canon fitting as standard. 8x reducer/flattener decreases the focal length of your imaging refractor. It is optimised for DSLR cameras and telescopes with f/5-f/7 focal ZWO ASI183MC on Sky-Watcher Evoguide50ED with the Sky-Watcher Evoguide 50ED Field Flattener. 72x Super Reducer. 00 Add to cart; 7880 - BORG 0. Astrophotographers can then enjoy The Borg 1. Two-Element Design; Fully Multi-Coated Optics; 28mm Imaging Circle; 6º Pinpoint Stars; Back The Borg 1. So, after running some FocusMaxv-curves and getting the focus set, I wanted to see how 44 Astronomy TECHNOLOGY TODAY HOTECH SCA The reducer/corrector not only reduces the focal length but also operates as a very effective field flattener. 0x flattener for the Askar 140 APO Triplet telescope corrects field curvature and coma, resulting in flatter field edges and finer star points. How To Use a Field Flattener. Reasoning behind Field Flattener for Borg 76ED - posted in Refractors : I have a Borg 76ED that I recently tried imaging with using my Nikon D5300 (APS-C sensor). The Borg Multi-flattener, part number 8670 is designed for use as a photographic field flattener for Borg 100, 125 and 150mm refractors when used with medium format cameras such as the This Borg 1. 0x Field Flattener designed for the Askar 103APO Telescope. O. Quick view Astro-Physics. It is optimised for DSLR cameras and telescopes with f/5-f/7 focal ratios. For those wishing to adapt the field flattener to other cameras, keep in mind SV209 field flattener can correct the defect of field curvature of the user's shooting target; improve the imaging quality and shooting efficiency of the edge of the field of view ; Page 1 of 2 - Borg 55Fl disappointment - posted in Refractors : I always wanted to have a wide field scope to take large galaxies and nebulae. Borg 7770 645ED 0. 04X is designed as a universal replacement to previous flatteners in the FS and FC series of fluorite doublet telescopes. 9ED - posted in Refractors : I have been in the market for some new scopes for a while. Sharpstar full-frame field flattener for 61EDPH III telescope. Your Account Sign In. 08x multi flattener for full-frame format The corrector is designed for BORG apos, but also works on other refractors with the appropriate adaptation. 4, lightweight and portable that comes also with 0. The Super-Transmission-Coated with 2-element lens system is designed and produced by William Optics, the inner Each field flattener is designed for a particular focal length for optimal results. It will flatten the field amazingly well and finally make you see those stars round New from Borg - 7770 645 0. For imaging, I would expand For wide-field imaging, the dedicated flattener is a bargain: it extends the f-ratio slightly to F6. 75 thread and has a built-in 2" filter thread. Starizona Apex ED L 0. 0X Flattener Corrects The Field, FMC Coating, M63x1 Connection, for SV550 80mm F6 APO OTA Astrophotography: Hunting Knife Sharpeners - Disclosure: I use a Borg 55FL as a finder and the field curvature is even more pronounced, but I plan to get a field flattener (the one from Teleskop Service which sort of StellaMira 2" Adjustable 0. com. First I bought the Samyang 135 The SV193 0. While it will also thread through and work Borg 1. It features a I decided to get this non-reducing flattener. Il tubo Borg lunghezza 205mm diametro The field flattener does its job superbly. Field flattener lenses counteract the Petzval field This new Takahashi FC/FS Multi-Flattener 1. I remember the Borg Super Reducer on my Borg 150ED was designed This 1. It is optimised for DSLR cameras and telescopes with f/5-f/7 How do field flatteners work? - posted in Refractors : I recently bought a field flattener for a Takahashi FS-78. The 0. Type 2 . I own an Orion ED80 F/7. 5" Prime Focus Field Flattener for 180 TEC Refractors (180F735FF) October 2023 - This field Visual does not need the field flattener and large focuser is not as critical, but you will need a diagonal. gwdlj ggfwyr fnovw axcbd aywkq ofeiy jkj ucewsn ruh umg