Evoguide 50 APO Refractor $275.00 SKU S11170 Backordered. Reino Unido Reino Unido stock Vendedor. In photographic lenses, extra optical elements are added in the lens design to reduce or correct these distortions, thus rectifying the image. Two Lens Field Flattener. For more information click HERE. Adapter to connect Planostar 1.0x Flattener to Altair 2.5" R&P Focuser 2014 Wave Series Telescopes £35.00 £29.17 (ex. Because planets are often small in the frame, field curvature is less an issue in planetary astrophotography, but when you fill the frame, like in closeups of the lunar surface or deep-sky images, the problem is real and readily visible. The 31.8mm ring focuser allows you to use the Evoguide ED50 both as a finder and as a guide telescope, in fact it is equipped with a T2 thread to allow the attachment to most of the driving and shooting cameras on the market. Let’s see this image in a bit more detail, by considering 100% crops of a region near a corner of the frame and near the center. Sky-watcher Field Flattener For EVO Guide-50ED. Product can be shipped as of 01.03.2021Order now! The flattener inserts into the 2" focuser. Flat Field: 28mm. Our Price: $80.00. Shop B&H for our huge inventory of Focal Reducers & Field Flatteners from top brands like Sky-Watcher, Vixen Optics, Celestron and Tele Vue, at great prices. Because of this, all stars are on the same focal plane… at infinity. That’s it. Masketo Mascarilla con motivo de palmeras (1 unidad), Masketo Mascarilla con motivo astronómico de corona solar (1 unidad), Masketo Mascarilla blanca con motivo astronómico de las Pléyades (1 unidad), MYONE Mascarilla para boca y nariz, talla L, 1 unidad, Masketo Mascarilla para boca y nariz de poliéster Corona Borealis, Mascarilla protectora para boca KN95, 10 unidades. Some flatteners are also reducers: this means that while they correct the field curvature, they also reduce the focal length of the telescope. Some flatteners do just that: they flatten the field removing the field curvature created by the telescope. Budget refractors, in fact, may have an attractive price tag, but the cost of the final setup can, sometimes, double once you add the field flattener. The field flattener works with sensors up to APS size (27mm diagonal). The 1.25" barrel will fit into the 1.25" helical focuser of the EvoGuide 50ED, but can also fit 2" focusers using a step down ring. You must be logged in to post a review. They reduce the normal field curvature inherent in most refractors. With a full-frame camera, this flattener will still show some field curvature at the edges of the frame. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. A Field Flattener is an expensive piece of equipment, sometimes reaching 50% or more the telescope’s cost. Related products. Precio $ 52.000 IMPERDIBLE ¡Único! (I figured out a way of mounting 1.25" filters as well - exactly as the gentleman in the video did with the little adapter ring!) Share this: Share on Facebook Tweet on Twitter Share on Google+ Pin on Pinterest. Field flattener/reducer counters the field-angle dependence of a system’s focal length. Vendo tubo guia EVOGUIDE 50ED con su flattener original. Corrects for field curvature, allowing the Evoguide 50ED and 50DX to be used for astrophotography Thread on metal caps T-thread connection or 1.25" opening for camera mounting 28mm imaging circle 17.5mm back focus 5.33 x 3.57-degree field of view when used with APS-C crop sensor Key Features. The flattener is a lens that evens out the field, as this is slightly curved by the primary optics. For any practical consideration, the night sky is flat in the field of view of your instrument, with all the stars at infinite. Descripción del producto: La lente Flattener se encarga de allanar el campo visual, contrarrestando así la aberración esférica resultante por el sistema óptico del telescopio.Este tipo de aberración hace que las estrellas situadas en la … It allows high-quality astrophotography with the very compact and lightweight telescope. El telescopio debe presentar siempre las mismas dimensiones. The Sky-Watcher Evoguide 50ED Field Flattener, instead, has only 17.5mm of backfocus, barely enough to reach focus with cooled and uncooled astro cameras. specifications: Sky-watcher Field Flattener For EVO Guide-50ED; Flat Field: 28mm; Back Focal Length: 17.5mm; Internal Diameter: 1.25" (31.7mm) warrany: 2 years; Net Weight: 150g; Kit content Sky-watcher Field Flattener For EVO Guide-50ED user guide For more information about, Sky-watcher Field Flattener For EVO Guide-50ED website. A field flattener flattens the field of view and ensures round and sharp stars all around the frame. Las mejores ofertas para Skywatcher de campo para evoguide 50ED. Mfg #: S20214. So, no DSLRs with the Evoguide and at the moment, there is no way around this. If the back focus is too long, it is not a problem: just buy some extension tube to have the camera sensor at the required distance. It isn’t available in the US yet. Two Lens Field Flattener; Fully Multi-Coated; 28mm Flat Field; 6º Pinpoint Stars; Back Focal Length 17.5mm; 1.25" (31.7mm) Internal Diameter; M42x0.75 Exterior Thread (T2) Green Anodised Aluminium Screw-on End Caps; Net Weight 150g Contiguous US Customers: All items we sell ship for free within the Contiguous US. Using a field flattener is a no-brainer: just screw it at the back of your telescope or insert it in the telescope using a nosepiece. The resulting effect is that a flat object behind the lens looks curved to the observed on the opposite side of the lens. With the Starizona EVO-FF field flattener, the available back focus is 34mm, enough for a mirrorless camera but still too short for a DSLR camera. This IS NOT for the SV80ST Triplet. Kit … I have one on order from the UK. You can eventually stop the lens down a bit to improve the edges sharpness and reduce chromatic and coma aberrations, but that’s about it. For the EVO-FF field flattener, for example, Starizona declares a tolerance on the back focus of +/- 2mm. SkyWatcher Field Flattener for Evoguide 50 ED with two element fully multicoated optics and a standard M42 T-thread allowing 6 degrees of flat wide field pinpoint stars for astrophotography though the Evoguide ED scope, lightweight and simple to add, perfect for wide field imaging with extreme portability. The Starizona EVO-FF, for example, is suitable for refractors with a focal length ranging from 250mm to 450mm. Contiguous US Customers: All items we sell ship for free within the Contiguous US. William Optics Flat6AIII 0.8x Reducer & Field Flattener - M63 to 2" This William Optics 2" Field Flattener & Reducer has been designed to optimize the flat-field imaging performance of William Optics GT71, GT81, Z81 & Z103 refractors. A field flattener corrects this problem. Sky-Watcher’s new 50mm ED Guidescope with ED lenses and low dispersion 50mm diameter. Or does .15 mm really matter? It is highly recommended to use a field flattener with this EvoGuide. Our Price: $80.00. *Todos los precios incluyen el IVA y los gastos de envío. A field flattener is also must-have for observers interested in astrophotography. Sky-Watcher Evoguide 50ED and field flattener, Sky-Watcher Evoguide 50ED Field Flattener. I recently reviewed the combination of the Sky-Watcher Evoguide 50ED and field flattener, and while without a flattener a DSLR can be used, but with the dedicated Sky-Watcher Evoguide 50ED Field Flattener attached, the back focus is so short (17.5mm) that you can only use astro cameras. One type of field curvature common in photography is barrel distortion. If you click a link on this page, then go on to make a purchase, we may receive a commission but at no extra cost to you. Our #: OMIS-SW-S20214. The new Sky-Watcher field flattener for the compact Evoguide 50ED mini telescope is designed up to APS-C format (28 mm diagonal). La lente Flattener se encarga de allanar el campo visual, contrarrestando así la aberración esférica resultante por el sistema óptico del telescopio.Este tipo de aberración hace que las estrellas situadas en la parte cercana al borde de este se aprecien con menos nitidez. Las mejores ofertas para Sky-Watcher de campo para Evo Guía - 50ED 20186 (Reino Unido stock) están en eBay Compara precios y características de productos nuevos y usados Muchos artículos con envío gratis! Would that ok? With this type of distortion, the image is stretched near the center of the frame. Write a Review. But for deep sky astrophotography, it is not optional: you need a flat field. In order to be able to focus with your camera, the camera sensor must be placed at the proper distance from the back of the instrument. The field flattener is threaded for standard 1.25" filters, allowing the use of light pollution or other imaging filters. Key Specification. Especial para Star Adventure y hacer fotografía de ultra campo amplio. Browse an extensive selection of astronomy equipment at Telescopes.net. Antes de comprar este producto, asegúrate de mirar los accesorios recomendados. Due to the extremely wide field of views the EvoGuide is capable of providing with the appropriate eyepieces, the distortion can easily be cropped out leaving a reasonable wide-angle image. Indica el conector o la rosca de conexión que deben tener los productos en el extremo que conecta con el telescopio. As shown in the image above, when using refractors, field curvature is often a Pincushion one and it results in elongated stars creating a runaway effect. The stars are not sharp and display color separation. On the camera side, the flattener has standard M42 T-threads. The 0.8X focal reduction converts the 80 mm f-7 into an f-5.6 with a focal length of 448 mm. Back to top Es la conexión o rosca ubicada directamente en la cámara. You can also purchase a field flattener for the telescope to compensate for this type of aberration. When Should I Use A Field Flattener And Will My Images Look Better If I Use One? en Caja De Venta están en eBay Compara precios y características de productos nuevos y usados Muchos artículos con envío gratis! The Sky-Watcher Evostar 72ED and most of the William Optics refractors have their own field flatteners. A field flattener is an optical element that corrects the field curvature in some types of refractor telescopes. With this type of distortion, the image is stretched more and more going towards the corners of the frame. But it does matter. - Mostrar menos accesorios de esta categoría. A lens is a curved glass, and light rays passing through it are also curved. It weighs only 2 lbs and is 10.5” long. Two Lens Field Flattener; Fully Multi-Coated; 28mm Flat Field; 6º Pinpoint Stars; Back Focal Length 17.5mm; 1.25" (31.7mm) Internal Diameter; M42x0.75 Exterior Thread (T2) Green Anodised Aluminium Screw-on End Caps; Net Weight 150g