• Thread-on field flattener • 2. 72ED Guidescope + OVL Field Flattener Distortion Issues. It accomodates f5 to f8 refractor telescope. 01909774369. sales@rothervalleyoptics.co.uk. (4 Reviews) 2 year warranty. Eliminates Drawtube & Visual Back Slop. This Flattener was designed to reduce the focal length of the Meade Series 6000 APO Refractors to expand the field of view with the camera being used. Also provides much improved field-edge correction. William Optics P-FLAT6AIII Adjustable Field Flattener / 0.8x Reducer £179.00 buy DETAILS This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. I'm struggling a bit with the distortion at the edges of my images where the stars are . OVL Field Flattener is a lightweight, reliable, portable, durable and superb quality, non-focal reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratios of between f/5.5 to f6.0. This flattener is for photographic use only. The Explore Scientific ES HR Coma Corrector is one of the highest quality units available on the market today. Will also provide much improved results on refractors with focal lengths narrowly outside this optimised f/range. Attaches directly to telescopes with an M63 thread on the end of the focuser. * Name. APM Riccardi 1x Field Flattener Model 2 for f/8-f/9 APO Refractors The APM Model 2 field flattener is intended specifically for refractors with focal ratios from F8 to F9. Reducing factor 0.8X. Examples of sub-aperture corrector for field correction: singlet lens field flattener and doublet field flatteners. Sky-Watcher Field Flattener for EvoGuide 50ED. I went and Bought a .85x FF from skywatcher from Harrisons to match the SW 72 ED along with a 48 T ring for my canon 2000d and the camera rotator by evoframe and a CLS clip in filter. Simply fill in the form below and we will get back to you as soon as we can! Field flattener back focus - posted in Beginning Deep Sky Imaging: I am using an Orion EON 130mm ED Triplett refractor scope and Orion proprietary field flattener with a Canon EOS 70D for astrophotography. Hi- Thanks a lot for the insight. The inner flattener lenses can be set at the optimum 66mm-86mm back focus distance (Distance from flattener lens to film or CCD plane). Weighs 7.5 oz. It is compatible with 2" focuser drawtubes and its barrel is conveniently threaded for use with 2" filters. I haven't gotten the Orion flattener to work with my setup. The flattener, also called a field flattener, corrects this effect. Sky-Watcher Field Flattener for EvoGuide 50ED. OVL Field Flattener. FAQ. 80mm of back focus. It is compatible with 2" focuser drawtubes and its barrel is conveniently threaded for use with 2" filters. The Orion Field Flattener for Short Refractors has fully multi-coated 2-element optics and a clear aperture of 38mm. . Add to Basket. Field Reducers and Flatteners from Takahashi, Optec, Borg and TeleVue. You use the various extension tubes to get the required distance. The skywatcher fits directly. OVL Field Flattener With T Ring Adaptor Zoom: . The flattener's back-focus requirement is 55mm (2.17") from the male T-thread to the CCD chip on your camera. I personally . This elegantly designed 2" reducer / flattener has been designed to optimise the flat-field imaging performance of William Optics f/6 to f/7.5 refractors. That FR looks a good bet, nearly doubles your back focus - TS tend to do good stuff but have no direct experience of that unit. Please note this can't be done through the website at this moment in time. This in turns speeds your instrument up a bit which helps with collecting light. We offer 12, 24, 36 and 48 months with a fixed 15.9% typical APR. £195: 2021-09-28 08:11:53 It feature a high quality CNC machined body with gloss black . Skywatcher Field Flattener For Esprit 100 ED £155. Nikon DSLR 0.8x Reducer Flattener kit for Starwave 70ED F6 Refractor £119.00 £99.17 (ex. Backfocus distance of 55mm is required to achieve proper focus. La Fulgor Basket è la principale società di pallacanestro della provincia del Verbano-Cusio-Ossola. While ColorFilter is powerful and flexible, image manipulation is a vast field and it simply cannot cover everything. This very elegant 2'' reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. This allows you to attach extra accessories between the camera and the flattener, like off-axis . The field flattener corrects the inherent spherical aberration of curved lenses which, if left uncorrected, causes images to appear distorted at the edges of the field . Flat7 for FLT132 and GT102 Blue 0. 8x 3" field flattener - focal reducer. 3) OVL Field Flattener (+ extension tubes to get correct back focus) [msrp £89 or $120] 4) Vello Shutterboss II (Nikon model) [msrp $49.99] 5) Nikon T mount ring adapter [msrp ∼ $10] Total value as new = $1,100 Asking price = $850 Right !! Also included are the Skywatcher tube-rings and dovetail seen in the pictures (the original mounting foot will also be included and is in the Skywatcher metal carry-case). The flattener has 45mm clear aperture compared with 37mm for typical T2 adaptations. Hi Mate thanks for the update Much Appreciated! 0.77x Focal Reducer / Field Flattener Specifications: Effectively reduces Focal Ratio of Esprit-150ED to f/5.4 Three-Lens Fully Multi-Coated Optical Design Image Circle: 36mm Full Frame Compatible 2-Inch Filter Compatible 75mm Back Focus or 55mm with supplied adaptor M48 x 0.75 Adaptor Weight: 910g (with end caps) Effectively reduces the telescope's focal length by a factor of 0.85x to enable imaging at f6.37. -- very large Back Focus distance of 109mm (exceptions: see belo). Refractors use a Field Flattener, which are often twinned with a reducing element in it to make your telescope's focal length shorter. Product description. This Sky-Watcher 0.85x focal reducer/flattener is optimised for the Sky-Watcher Evostar 80ED PRO refractor. WO Flat 6Alll will provide good illumination and flat field across 97% of full frame sized sensors. 1) Sky-Watcher Star Adventurer Pro [msrp $425] 2) Sky-Watcher Evostar 72 Apo lens (with hard case) [msrp $490] 3) OVL Field Flattener (+ extension tubes to get correct back focus) [msrp £89 or $120] 4) Vello Shutterboss II (Nikon model) [msrp $49.99] 5) Nikon T mount ring adapter [msrp ∼ $10] Total value as new = $1,100. Skywatcher Field Flattener For Esprit 100 ED £189.00. This is suitable for telescopes that are F6 or longer. Weighs 7.5 oz. I currently have the SW 72ED with the OVL field flattener mounted on the Star Adventurer and I'm imaging with a Canon EOS 800D. This is to be measured from the shoulder of the flattener (where the male T thread begins). Thanks to my friends at Ontario Telescope and Accessories, a brand new Altair Hypercam 183C arrived at my door last week. ovl field flattener back focus La Fulgor Basket è la principale società di pallacanestro della provincia del Verbano-Cusio-Ossola. Rother Valley Optics. 4 F=644mm Image. This very elegant 2'' reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. -- excellent performance on a broad range of very different refractor telescopes from f/5 to f/8. OVL Field Flattener With T-Ring Adapter In Stock Superb quality, non focal reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratios of between f/5.5 to f6.0. Produced entirely with the best Ohara optical glasses. The flattener has been designed by Massimo Riccardi for APM Telescope.. £409.00. HoTech SCA Field Flattener 2″ High Quality Optics Designed for Refractor Telescopes. This elegantly designed 2" reducer / flattener has been designed to optimise the flat-field imaging performance of William Optics f/6 to f/7.5 refractors. WO Flat 6Alll will provide good illumination and flat field across 97% of full frame sized sensors. Please note this can't be done through the website at this moment in time. Adjustable Reducer / Flattener for William Optics GT71, GT81, ZS103 Telescopes. Designed specifically for the Sky-Watcher Esprit-150 ED Apo Refractor, the new three-lens Focal Reducer/Flattener has a reduction factor of 0.77x. This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. Currently have the OVL field flattener with T ring adapter into a cannon 600d. FMC tripllet APO design. Both will then mean you have to put the camera sensor as specified distance (backfocus) from the flattener. Use in conjunction with a DSLR-M48 Ring Adapter. I don't know if it's a spacing issue (I tried 54-59 mm back focus), or if was just broken, but the stars were not round in the corners. Adjustable design, for perfect back focus it can be used with other models of refractor; 48mm filter ready . Sky-Watcher .85x Reducer/Flattener for Evostar-72ED Pro. 8x Reducer (reduces f6 to f4. EXAMPLE 1: Schmidt camera field flattener - Good example for the use of a single-lens flattener is the Schmidt camera, which is exclusively a photographic instrument.Its only remaining primary aberration is strong field curvature. Backfocus distance of 55mm is required to achieve proper focus. FAQ. Takahashi Flattener 1. You can however, purchase the OVL field flattener, which is cheaper if your budget is tight. This is a bespoke adapter made specifically for the 72ED, the other reducer/flatteners for Sky-Watcher refractors will not fit this scope. VAT) PlanoStar 0.8x Reducer for 115 EDT-X with M92 3.7" Focuser - M72x1 rear female thread Works with f/5 to f/8 refractors. OVL Field Flattener (with T-ring adaptor) £95.00 £89.99 . Rother Valley Optics. A thin planoconvex lens placed in front of the photographic plate in some telescopes that have a curved focal plane so as to focus light on the flat plate This new lightweight model features the Field Flattener lens system, which delivers an extremely wide. Finance is now available on most products above £250! (4) £210. The Evostar 80ED SD Pro has the reducer as an extra (quite expensive vs Altair at £180. Please enter your full name * Telephone Number. OVL HyperFlex-7E 7.2mm-21.5mm High-Performance Zoom Eyepiece; OVL HYPERFLEX-7E2 Eyepiece; OVL NIRVANA UWA-82° High-Performance Eyepieces; OVL X3 BARLOW LENS (3-ELEMENT) OVL X3 BARLOW LENS (4-ELEMENT) SKY-WATCHER 'SP-SERIES' SUPER PLOSSL EYEPIECES; Sky-Watcher 10mm Erecting Eyepiece The Orion Field Flattener for Short Refractors has fully multi-coated 2-element optics and a clear aperture of 38mm. Skywatcher Equinox 80ED for sale, including OVL field flattener (50mm back focus). £89. : 6x in stock shipped 1-2 working days. Product description. OVL Tele-Camera Adaptor . Add to Basket. 3 Focal Reducer/Field Flattener threads on to the rear cell of any LX90, LX200 or other Schmidt-Cassegrain or Advanced Coma-Free model and is typically used with an Off-Axis Guider or T-Adapter. Designed specifically for their EvoStar 72ED f/5.8 refractor guidescope, the Sky-Watcher 0.85x Focal Reducer/Flattener is an indispensable dual-purpose accessory that allows you to use it for astrophotography and astroimaging. It comes with a standard adaptor with M48 thread edge and 55mm back focus for use with Sky-Watcher's M48 Canon EOS (code 20237) and Nikon (code 20238 . In unused condition and original packaging. This flattener is for photographic use only. The length of the male T thread is approximately 2.5mm but this will be covered by the T thread spacer or T ring. We offer 12, 24, 36 and 48 months with a fixed 15.9% typical APR. There is a skywatcher reducer/flattener, and also the OVL flattener. Find out more about the Sky-Watcher Coma Corrector for Newtonian Reflectors. Its combination of modest price, easy mounting and You would need a flattener or reducer for serious or full-frame imaging, but this focal length leaves you spoiled for choice when it comes to. In the case of the Celestron 8″ RASA F/2, no field flattener is needed as this optical system is very flat to begin with. This will soon (hopefully) be replaced with a 2600MC Pro and I've been trying to get my head around the back focus situation and have come up short if I'm honest. Altair Hypercam 183C Review. A high-quality, non-focal-reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratios around f/5.5 to f6.0. And between the field flattener and skywatcher evostar 72/420 apo, we don't need anything, as it is a push-in connection. Skywatcher Equinox 80ED for sale, including OVL field flattener (50mm back focus). Finance is now available on most products above £250! Attualmente disputa il campionato italiano LNP serie B. This is 55mm for the skywatcher, not sure for the OVL. : 6x in stock shipped 1-2 working days. OVL Field Flattener (with T-ring adaptor) £95.00 £89.00. Astro Photography Tool Filters: Optolong L-eNhance 2" . Skywatcher Field Flattener For Esprit 100 ED £189.00. 5 - F/6, then OVL have a 1x flattener available. The 0.85x reducer/flattener to provide a flat field across your image and enable imaging at F/4.93. I'm struggling a bit with the distortion at the edges of my images where the stars are elongated away from the centre. My problem is the back focus of the field flattener is only 51.5 +/- 5 mm and the flange to sensor distance in the Canon dslr is 44 mm. 0.77x REDUCER/FLATTENER FOR ESPRIT-120ED TRIPLET. With a 5mm thick T-EOS adapter, the back focus is . 66x reduction: The actual measurement is 55mm of back-focus starting from the field-flattener's M48 adapter - not the 75mm quoted in the. A sister design, the Model 1, is for F6 to F7 refractors. in that it consists of two tubes, (one inside the other). The main issue with the Celestron 0.63x SCT FF/FR is that there is no information published by Celestron that states the correct back focus distance, or the point on the reducer from which to measure back focus. OVL Field Flattener Price £84. This is an excellent scope for both visual and astrophotography. The flattener offers. With the Hotech 2" SCA Field Flattener, you'll see clear, crisp images over the entire field. The HoTech SCA Field Flattener 2″ is fully multi-coated on two-element lens allowing the most efficient light transmission without sacrificing the precious collected light from your telescope. Superb quality, non-focal reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratios of between f/5.5 to f6.0. Use in conjunction with a DSLR-M48 Ring Adapter. This leaves two choices: either use of a curved detector, or sacrificing much of the exquisite field quality by using flat detector. . The flattener, also called a field flattener, corrects this effect. This is an excellent scope for both visual and astrophotography. I'm quite new to this hobby so I'm still trying to sort a few things out. Provides good illumination and a flat field across 97% of a full frame sensor field of view. Please be noted that these are just examples for 55mm back focus, you need to know the back focus of your reducer and flattener first and then arrange the adapters. It also provide much improved results on refractors with focal lengths narrowly outside this optimised f/range. Attualmente disputa il campionato italiano LNP serie B. Società Organigramma Storia Sponsor Team Prima Squadra Promozione Junior Minibasket Under 13 Under 14 Under 15 Under 18 Notizie Fulgor Junior Wolves Gallery Starwaven er en f/7, men med reducer/flattener en f5. Sky-Watcher and OVL Eyepieces & Barlow Lenses. Add to Basket. Superb quality, non-focal reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratios of between f/5.5 to f6.0 . 178484: For Sale: Sold: PrimaluceLab Sesto Senso v2 with WiFi connectivity and top precision. Provides good illumination and a flat field across 97% of a full frame sensor field of view. It comes with a standard adaptor with M48 thread edge and 55mm back focus for use with Sky-Watcher's M48 Canon EOS (code 20237) and Nikon (code 20238 . (4 Reviews) 2 year warranty. 77x) B&H # SKS20209 MFR # S20209. However, a new backfocus distance is needed between the camera sensor and the top surface of the lens group cell. I currently have the SW 72ED with the OVL field flattener mounted on the Star Adventurer and I'm imaging with a Canon EOS 800D. A high quality CNC Machined 10:1 dual-speed Crayford focuser. Superb quality, non-focal reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratios of between f/5.5 to f6.0. Sky Publishing Sky Atlas 2000. 0.77x REDUCER/FLATTENER FOR ESPRIT-150ED TRIPLET. This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. The striking purple exterior color of this one-shot color CMOS camera makes a bold statement, but it's the deep sky imaging capabilities of the cooled sensor that have captured my attention. 85x and the field correction is clearly improved at the same time. I use, and recommend, an Altair Lightwave 0.8x Reducer/Flattener. Designed specifically for the Sky-Watcher Esprit-120 ED Apo Refractor, the new three-lens Focal Reducer/Flattener has a reduction factor of 0.77x. Please be noted that these are just examples for 55mm back focus, you need to know the back focus of your reducer and flattener first and then arrange the adapters. Integral T-Ring adaptor thread. The most considered information comes from some conversations on CO, and an old article in Sky at Night. Add to Basket. So if I have understood well, then the article 14608 connects the field flattener at some side and the another side connects to the Canon EOS camera with article 2416. A third party field flattener will work just fine, as long as you stay within its specified focal ratio / focal length. Light frames was taken from my DSLR (modded) Canon 600D mounted on a SkyWatcher 72ED supported by a NEQ6 Pro, OVL Field flattener and an Antares 80 mm Guide Scope with an QHY5 Guide Camera, the exposure set was ISO 1600 time is 15 min number of exposure taken 28 (on the course of two nights 25th november and 4 . £89. It screws directly onto a T-mount so no need to mess around with adaptors which can upset focus, the other end is threaded to accept 2" filters. 01909774369. sales@rothervalleyoptics.co.uk. Meade Serie 4000 6. Asking price = $850. 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