field flattener reducer

Adjustable reducer flattener Flat73R for Z73. Field Flatteners for Premier (SVX) Refractors, 2. I have some products like that. £163.00 Including VAT & Warranty. 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. Reducers and/or Flatteners for other telescopes, Finderscope Eyepieces with Focusing Reticle, Barlows to double the power of your eyepieces, Reducer/Flattener for f/7 Refractors with 2" Focuser - SFFR102-2, Field Flattener for refractors with 2" Focusers - SFF7-21, 3. The Meade f/6.3 Focal Reducer/Field Flattener for Meade Schmidt-Cassegrain models, improves edge-of-field correction and reduces exposure times by close to 50%. Found inside – Page 406This is also true of the field flattener H , which can be mounted as shown by a conical unit within the shadow and through ... corrector and focal reducer , with the final image having many times the speed of the initial “ Cassegrain . This is a dedicated Sky Rover 0.8X Focal Reducer/ Flattener specifically designed for use with a Sky Rover Triplet ED Apochromatic Refractor series of telescopes. Requires 55mm of refractor telescope backfocus, weighs 7.5 oz. ]. The sky was covered with a thin cloud layer producing some significant light pollution which for the purposes of this exercise was useful as it allowed the vignetting of the field to become easily apparent. The flattener helps correct spherical aberration. so shorter total exposures will be required. Oftentimes, a field flattener also has focal reducer capabilities, so you can get wider shots out of your scope. Reducer/Flattener for SV102T / SVR102T / Access 102. baffle tube to, again, provide a flat field with ‘clean’ stellar images out to 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 non-reducer flattener's back focuse distance, T-Thread shoulder to the CCD chip, requirement is 55mm. Found inside – Page 62I also used a Meade f3.3 Focal Reducer / Field Flattener and a Celestron / SBIG Pixcel 237 CCD camera . The image is assembled from luminance : Red , Green and Blue components . The luminance images ( black and white ) are exposed for ... In this video guide I will show what methods you can do and achieve good results in . One can from the figure seen below that this will locate the camera well to the rear of the focuser so an extended dovetail bar was used to mount the telescope/camera combination and retain balance about the Declination axis as shown in the image above. I was so impressed on the flatness of the field and stars are pin sharp up on the edges. This guide is specifically aimed at those who are using—or want to use—Sequence Generator Pro. by starizona. catadioptric telescopes employ additional lens elements mounted within the rear Found inside – Page 209other hand, if your forte is astrophotography, the exceptional portability of the C5 will enable you to image at either f/6.3 or f/3.3 (by acquiring a 0.33 reducer/field flattener). In that capacity, it is even more versatile than its ... Fully Multi-Coated Lanthanum Glass. A reducer is in a sense the opposite of a barlow: It focuses the light from the scope to a smaller area, the effect is a shorter focal ratio and a smaller image circle. Make sure this fits by entering your model number. I have coupled the TS2F to an 80mm semi-apo refractor having a focal length of 500 mm. 450-490 mm: 123 mm The Meade f-6.3 Focal Reducer may be used to increase field of view and reduce magnification for visual applications. The affected corner areas are individually selected and the layer duplicated. The Sky & Telescope Hot Product for 2010 Astro-Tech 2" photographic field flattener improves the image sharpness at the corners of the field with Astro-Tech and TMB apo refractors, but will also work well with any other brand of f/6 to f/8 refractor, as well as Astro-Tech Ritchey-Chrétiens . ♦ The adjacent photograph was taken with an 80 mm f/6 APO refractor and shows the very good sharpness in the field. They are extremely popular. Add to Basket. The reducer HD kit for the Vixen FL55SS consists of a field flattener lens, a focal reducer and a connecting tube ring, which is designed for the FL55SS optical tube. Reducers and field flatteners have an optimum spacing between the camera sensor, and the rear of the unit. Photo (see article in the Digest) to this image with a radius of ~20 Found inside – Page 89Fig 59 is a wide field image is of the region comprising Rho Ophiocus star, Antares in Scorpious among others. It was taken with a Canon 6D full frame ... Focal reducer, field flattener or filters. • Tring for DSLR and T to 2” nosepiece ... Price: $695.00. In this case the extension tube must be a standard t-thread (M42 X.75). Mounted in its threaded cell, f/3.3 Meade CCD Focal Reducer . Petzval telescopes aside, where the field curvature is corrected in the telescope, if you are using a refractor for deep sky astrophotography, then you need a field flattener to correct for the field curvature of your instrument. Found insideOfferingthe best offaxis correction of the Cassegrain family, RitcheyChrétiensare particularly recommended for deepsky imaging with large sensors, and ofcourse with a field flattener. Companies suchas Optical Guidance Systems (OGS), ... The reducers will usually screw directly into the bayonet part of a T-mount so, if used, the barrel part of the T-mount is not required and one may not need to use a focuser barrel extender to reach focus. Explore Scientific Zero X Field Flattener 2 Inch M48 for ED80 and ED102. [This method will also correct for minor ‘star trailing’ when applied to the whole of an image. Teleskop Service 66 mm Quad astrograph which uses a triplet objective coupled But it wasn't the case with SV. You currently have javascript disabled. This focal reducer was designed for apo refractors used by many astrophotographers. Reducer/Field Flatteners For CCD, photographic, and visual applications. $165.00. Astrophotographers can then enjoy images where the stars remain sharp right out to the edge of the exposure. Page 1 of 1: 12 Items Sort by: Name Sort by: Newest Sort by: Price Asc Sort by: Price Desc Sort by: Top Sellers The field flattener/focal reducer offers 55 mm of back focus from the rear face of the device. VAT) PlanoStar 0.8x Reducer for Altair 102ED Triplet Wave Series Refractor with M63 2.5" Focuser £279 . The M42x0.75 adapter adds 3 mm, so the sensor needs to be 52 mm from the face of the adapter. im considering to buy the fcd100 102mm explore scientific apo carbon fiber telescope and want to add a field flattener and reducer to this telescope. The flattener inserts into the 2" focuser. Altair Flattener for 60 mm EDF Refractor. < 450 mm: 128 mm If the native image circle from the scope is a lot larger than the sensor, the sensor will see a wider field of view,  just like if the scope had a shorter focal length from the start. But Vic and Isaac have been great in finding me the SV SFFR. All Field Flatteners and Focal Reducer have a specification for the distance between the CCD. With telescopes of focal ratios greater than ~f/7 and This optical device is a field flattener (or reducer/flattener). Field flattener for refractors, suitable for telescopes from f4 to f8. The image below is of this flat frame and shows To connect to the 2.5 hex focuser, purchase item number 510366. The Digest contains an article ‘Repairing Coma in Star Images’ to correct for ‘seagull’ or ‘comet’ type coma. Helps eliminate distorted stars at the edge of the field, and features fully multi-coated lenses. Found inside – Page 92F/6.3 Focal-Reducer Corrector Lens The f/6.3 focal-reducer increases the effective f-ratio of a Schmidt-Cassegrain telescope ... terms such as but not limited to F/6.3 Focal Reducer Corrector Lens, F/6.3 Focal-Reducer Field-Flattener, ... Here's an explanation on how a reducer works. (A1226F) This aluminum cover is felted along its inside edge. . The M42x0.75 adapter is 6.25 mm thick with a working length of 1.8 mm. 28 raw frames in Sequator taken using [Takahashi do provide a dedicated field The shorter the focal length of Buy Sky Rover 2inch Field Flattener 0.8x Focal Reducer for 110ED telescope for 75 usd in the online store BestGoBuy Store. The book describes — How to shoot and process still image “nightscapes” – images of landscapes taken at night by the light of the Moon or stars … and … How to shoot and assemble time-lapse movies of the stars and Milky Way ... The non-reducer flattener's back focuse distance, T-Thread shoulder to the CCD chip, requirement is 55mm. The star images in problem known a ‘Field Curvature’ can arise whose effects will be greater as work well with refractors with focal lengths in the range 400 to 600 mm Use the two pieces together or separately to finely tune your telescope for capturing the best possible images. The former will leave the Perfect for any DSLR imager. The 3" Field Flattener/0.7x Focal Reducer from Explore Scientific is a dual-purpose accessory for astrophotography and astroimaging. Explore Scientific - 5x Focal Extender 1.25" Barrel - 4 Elements. Typically, they require a distance from the rear of the flattener to the sensor of ~56 mm. Found inside – Page 366So, for example, a focal reducer with a compression factor of 0.67× will reduce the focal length and focal ratio of the telescope to 67% of their original value. It is also often possible to get a combined field flattener/focal reducer. Takahashi has designed the 1.04x flattener to work only with the FS and FC telescopes. reducing the focal length by 0.8x. VAT) Nikon DSLR 0.8x Reducer Flattener kit for Starwave 70ED F6 Refractor £119.00 £99.17 (ex. Add to cart. larger. was the result of aligning  and stacking The field flattener/focal reducer offers 55 mm of back focus from the rear flange. This is a 70mm diameter 4 piece ED Glass full metal construction unit using premier quality Japanese ED Glass. (2) £89. Our selection of 42 mm extension tubes may be viewed, 1. Reducer Flatteners for other telescopes, 4. When a digital camera is used for imaging with a telescope a Providing pin point stars across the field of view, the Starfield 0.8x reducer/flattener decrease the focal length of your imaging refractor. $449.95. This was the telescope that allowed me to capture my first long-exposure deep-sky images including the Orion Nebula, North America Nebula, and the great Andromeda Galaxy. Found inside – Page 53It is a common practice therefore to fit a focal reducer, sometimes called a field flattener. Meade produces its own reducers, currently an f3.3 and an f6.3 reducer. These are designed for the LX200GPS series telescopes, ... The field flattening function: Some focal reducers also act as a field flattener to significantly reduce the field curvature in all Schmidt-Cassegrains and most refractors that causes stars to be out of focus at the edge of the field when the scope is sharply focused at the center. The reduction factor provides a 1.5x wider field of view and shortens exposure times by a factor of . The purchase of a longer bar will solve this problem. An example of a reducer is the TeleVue TRF 2008 which will The FF/R produced sharp, round star images all the way to the corners of my APS-C sized sensor. It screws directly to the Sky Rover focuser at one end, and to . shows the required separation between the rear of the flattener and the camera Fits all field flatteners and other parts with 6x7 outer bayonet. 700-800 mm: 111 mm article ‘Removing light Pollution …’ in the Digest and stretched to give the For example, the ‘Teleskop £100 less than the "optically matched" reducer/flattener from SW which is not even optically matched, just frankenstiened from the the ED80's reducer/flattener. The flattener, also called a field flattener, corrects this effect. This field flattener/reducer screws directly into the rear focuser rotator of your refractor, converting it into an astrograph with a flatter photographic field than the existing lens system alone. Found inside – Page 190... 125 Flat-field frame, 65–66 Flexible image transport system (FITS) images, 36 Floating-point math, for summing to combine images, 72 Focal reducer/field flattener, 49,51 —for guiding, 57–58 Focuser —electric, JMI NGF-S, 45 —manual, ... telescopes. Teleskop Service 2 inch flattener (TS2F) in use. Found inside – Page 113Afternote: I've enjoyed my Baader manufactured Alan Gee (ghee) f/6 flattener reducer for nearly a decade. ... round stars and no vignetting (the fall off in the uniform illumination of the field of view) with sensors up to APS size. Orion Field Flattener for Short Refractors. Flattener/Reducers for Premier (SVX) Refractors, 3. Very pleased with the product and the service. A reducer is in a sense the opposite of a barlow: It focuses the light from the scope to a smaller area, the effect is a shorter focal ratio and a smaller image circle. The arrow keys can then be used to shift the upper layer over the lower one and you will see how the distortion is removed before flattening the two layers. Eliminate field curvature in short, optically fast refractor telescopes with this handy 38mm clear-aperture, fully multi-coated field flattener. A set of 36 raw frames were taken with a full frame sensor Sony  camera and aligned and stacked in Sequator (see article in the Digest). VAT) Out of stock NEWTONIAN Coma Corrector 0.95x Maxfield £190.00 £158.33 (ex. Accomodates f/5 to f/8 refractor telescopes. I purchased a Stellarvue about two years ago and I wanted to do some imaging with it. Having with a singlet lens part way down the telescope tube to flatten the field. The Series 4000 f/6.3 Focal Reducer/Field Flattener:An important advancement in high-resolution focal reduction systems, the Meade 4-ele-ment, multi-coated f/6.3 Focal Reducer (arrow) threads on to the rear cell of any Meade LX-series mirror-lens telescope or to other Schmidt . Drastically Reduces Exposure Time. Found inside – Page 3674.7b M103, 4.10b NGC 869 & 884, 4.75b M57 Equipment: Explore Scientific ED80 f/7.5 refractor with focal reducer / field flattener Meade LX908-inch f/10 Schmidt Cassegrain with focal reducer / field flattener Orion SSAG guide camera with ... Found inside – Page 84The telescope manufacturers normally offer a matching field-flattener alternatives. ... astrographs have built-in field flatteners, ready for astrophotography and some of the OEM's also offer matched reducers and converters, ... The 2" Field Flattener Accepts 2" Filter Thread This reducer/flattener is optimized for our SV80 Access doublet lens. The field flattener/focal reducer offers 55 mm of back focus from the rear face of the device. WO Flat6A lll will provide good illumination and flat field across 97% of full frame sized sensors. New Adjustable Flat73A for Z73. Designed with nearly Full frame chip-size DSLR cameras in mind Celestron 0.7x Focal Reducer Lens for EdgeHD 925 OTAs. The Vixen VC200L and the Celestron ‘Edge HD’ the edge of the frame. The camera will be at some distance from the telescope focuser and so have a large turning moment (particularly if it is a DSLR or full frame mirrorless camera) and so with a normal short ‘Vixen’ dovetail bar it will not be possible to balance the telescope/camera about the mount’s declination axis. Zenithstar 73II APO. Community Forum Software by IP.BoardLicensed to: Cloudy Nights, This is not recommended for shared computers, Switch on the Light at RZ CAS (and VdB 7, VdB 9) in Cassiopeia, Astronomy laptop computer needed for field use. Providing pin point stars across the field of view, the Starfield 0.8x reducer/flattener decrease the focal length of your imaging refractor. the extreme corners of the image were not quite perfect but required just a Found inside – Page 48These things cause objects near the edge of the field to be less than sharp in the eyepiece and in images. For years, nobody did much about coma in SCTs. ... Also, the Field Flattener causes problems with some eyepieces and accessories. The ninth edition of Ian Ridpath and Wil Tirion's famous guide to the night sky is updated with planet positions and forthcoming eclipses to the end of the year 2017. Meade's Focal Reducer/Field Flattener is a fully multi-coated, 3 element design to help the astro-photographer capture wide field photographs of the night sky with the Series 6000 APO's. 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. will very likely contain one or more additional elements such as in the The flattener is installed between the telescope and the camera. to view image scale change use a FOV calculator like this one http://www.12dstring.me.uk/fovcalc.php at the barolw/ reducer option enter .8( for a commom 80mm scope type) the image will change. Antares f/6.3 SCT Reducer/Corrector. use of either ‘Field Flatteners’ or ‘Reducer/Flatteners’ (called reducers from SCA Damps Vibration The all-around adjustable tightness rubber contact damps unwanted vibrations from the telescope provides you a sturdy attachment on your telescope for a stable image capture. Designed to be used with any refractor, f/5.5 and longer, with a 2" focuser, and requires 55mm of back focus. ♦ focal length Save $-449.95. Most telescopes have pronounced 'field curvature', it means that the focus plane is curved like a fishbowl. It describes a reducer for camera lenses rather than telescopes, but it's the same principle. 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. This IS NOT for the 80 mm f-6 Triplet. a full frame Sony camera. iteration of the align and stacking process and so remove the vignetting. I am curious to know what happens or what an image looks like without a field flattener/reducer when taking pictures. Please be noted that these are just examples for 55mm back focal length, you need to know the back focal length of your reducer and flattener first and then arrange the adapters. Standard T-thread for most imaging cameras attachment. It's fundamentally cheaper than making a faster, shorter focal length lens. This flattener from Takahashi is made as a universal replacement for FS/FC flatteners. Connecting optical devices onto cameras and telescopes can be difficult. New for August 2021, thread on adatper tops to . I think the others have covered it pretty well. When the focus plane is curved and the sensor is flat, there is no focus position where the image will be in focus in the center and at the edges at the same time. For the Perfect field for astrophotography, all at BuyTelescopes.com used and a further example below). I had my first chance to image with the SV080A FF/R last night. 600-690 mm: 113 mm You have to first decide what you are trying to achieve: reduction, flattening, or both. There is, however, a consequent problem. Will also provide much improved results on refractors with focal lengths narrowly outside this optimised f/range.'' Found inside – Page 232Focal Reducers Imagers using f10 Schmidt-Cassegrain telescopes can obtain a field flattener/focal reducer to widen the field of view and reduce exposure times. The standard reducer for both Meade and Celestron reduces the focal ratio ... focal length of the telescope essentially unchanged whilst the latter will Stellarvue REDUCER/FLATTENER FOR SV115T WITH 3" FEATHER TOUCH FOCUSER - SFFR115-3FT. The light pollution was removed from the image as described in the Of course, you can buy a combination reducer/flattener. A perfect focal reducer and field flattener for refractor telescopes in the 400-600mm focal length range coupled with a DSLR or other CCD camera. You need to know how much distance there is between the cameras T-thread and the ccd chip. Fully multi-coated two-element high efficiency flattener lens. I had my first chance to evaluate the performance of the Stellarvue 0.8X Field Flattener/Reduce last night despite bright moon interference. A focal reducer works using a positive lens, which shortens the focal length by causing the incoming beam of light to converge more quickly. ♦ focal length the field – these will both widen the field of view and reduce the focal ratio Posted by Nalin Uduwawala on 22nd Mar 2021. This defined the captured area as 7.3 x 4.88 degrees. removed the light pollution and stretched the image I was very surprised at the Focal reducers and flatteners for faster exposures and wider fields of view with astrophotography, reducers shorten the effective focal length. Another, low cost, example is the Altair Astro Lightwave 1.0x Field Flattener which can be used with f/5.5 to f/6.25 refractors and which requires the ‘standard’ ~56mm separation. Found inside – Page 224All of the relations needed to specify the Schmidt focal reducer (SFR) are now in hand. For the telescope we take the design ... One problem is its curved focal surface, but a field flattener lens can be added to remove this curvature. Since a DSLR with t-ring has a 55 mm backfocus, plug the reducer/flattener into the focuser and then thread on the camera/t-ring to the flattener as shown below. wow thanks Goofi, I have been using a very very small sony chip ccd the atik420C. the distance from the flattener to the sensor adjusted to suit the focal length To use a telescope for photography an optical device is needed to convert your telescope from a visual instrument to a photographic camera lens. Meade f/3.3 CCD Focal Reducer/Field Flattener Series 4000 and Variable T-Adapter 07567:. $295.99. Found inside – Page 87To obtain the nominal multiplier value of the focal reducer, you must space the eyepiece or, in your case, the CCD imaging plane ... Often, you can find focal reducers that are actually a combination focal reducer and field flattener. While PixInsight is extremely powerful, very little has been printed on the subject. The first edition of this book broke that mold, offering a comprehensive look into the software’s capabilities. telescope but there are some that will work with a range of focal length Found inside – Page 339The entrance window of the cryostat will act as a field flattener in order to maintain the image quality specs of 80% energy ... The Low-Resolution Spectrograph (LRS) for the visible spectrum is a single-arm focal reducer EFOSC-type ... Designed with nearly Full frame chip-size DSLR cameras in mind. Found inside – Page 64Field. Flatteners,. Focal. Reducers/Flatteners. and. Coma. Correctors. These are placed in the optical path of a telescope in front of the camera. A field flattener will do this with little, if any, effect on the focal length of the ... Found inside – Page 342From right to left along the optical path are the transfer lens , meniscus corrector , color corrector , focal reducer mirror and field flattener . The component on the extreme left is the central obscuration . will try it this weekend. In stock. Standard 2" filters can be added to the reducer/flattener when imaging. No additional extension rings are required. SKU: SFFR115-3FT. In-Stock - Available at warehouse ships in 1-2 weeks. 44mm illumination size and fully corrected. Key Features. StellaMira 2" 0.8x Reducer / Field Flattener with M42 Adapter. The Reducer/Field Flattener offers a wider field of view through your system, working to decrease the focal length of your system. Here I show you what to measure and how to measure it. the focal length of the telescope become less and the size of the image sensor Zero reducer. With this product, you earn 200 loyalty points. i saw on the internet couple of flattener/reducer and saw something for SV115 . 500-550 mm: 118 mm Found inside – Page 205Table 6.4 Focal Reducers/Correctors Company/Model % Reduction Comments Celestron International Reducer/Corrector 37 ... 4000 37 Four-element design; multicoated optics Focal Reducer/Field Flattener them, unfortunately, so has coma. The optimum spacing distance for your optics is usually quoted in mm between from the flat face of the camera to the rear of the flattener/reducer excluding any threads (that's because the threads are buried when the units are tightened . ♦ focal length Back focuse distance requirement is . . Found insideMartin Mobberley. Zeiss (and the older, large Takahashi) apochromats feature a triplet lens (ED glass in the Astrophysics instruments, fluorite in the Takahashi and Zeiss instruments). An fl;.7 focal reducer/field-flattener is available ... Introducing Starizona's 5-Element Apex ED 0.65x Reducer/Flattener for Apo Refractors and RC/ACF Telecopes. Several functions may not work. $284.00. Found inside – Page 1822arcmin ? inscribed square field with a single spectrograph while the HIA - WFOS segmented the field into 4 separate smaller field spectrographs each with its own focal reducer . A brief description of ELVIS and the CIT - WFOS follows ... Our selection of 42 mm extension tubes may be viewed here. As a result, in order to correctly focus the Found inside – Page 41The next item in your imaging train is typically some kind of field flattener and/ or focal reducer (FR) (Fig. 3.9). This component corrects the image plane of your astrograph to make it as flat as possible. The flattener inserts into the 2" focuser. Be the first to review this product . Availability - In stock. The Astrophotography Manual is for those photographers who aspire to move beyond using standard SLR cameras and editing software, and who are ready to create beautiful images of nebulas, galaxies, clusters, and the solar system. That’s where Choosing and Using the New CAT comes in. This book guides even the most greenhorn astronomer past the pitfalls encountered on the path to enjoying the beauties and mysteries of the universe. the telescope the greater the problem as the curvature will be greater. As a field flattener, this accessory will take care of annoying edge-of-field aberrations brought about by curved focal planes, resulting in clear, sharp images. The SkyWatcher field flattener and reducer extend the corrected field and transform the Evostar ED refractor i nto a professional telescope for astrophotography. My scope is the Explore Scientific 127MM ED Essential Series with a ZWO MiniEFW and a ZWO ASI-1600MM-Cooled camera. Built to last and to my knowledge not re-badged battery chickens from some far away place! 4 Reviews. The optimum spacing distance for your optics is usually quoted in mm between from the flat face of the camera to the rear of the flattener/reducer excluding any threads (that's because the threads are buried when the units are tightened . Maintains EdgeHD Flat-Field Performance.