{"product_id":"svbony-25mm-plossl-metal-fmc-eyepiece-125in","title":"SVBONY 25mm Plössl Metal FMC Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e25mm Focal Length\u003c\/li\u003e\n\u003cli\u003e40° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25\" Diameter Barrel\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated (FMC) Optics\u003c\/li\u003e\n\u003cli\u003e4-Element Plossl Design\u003c\/li\u003e\n\u003cli\u003eStandard M28.5*0.6 Filter Threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY Plossl Metal FMC Eyepiece 25mm 1.25inch\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY Plossl Metal FMC Eyepiece delivers a classic moderate-power view with its 25mm focal length and 4-element optical design. Its 40-degree apparent field of view fits comfortably in any standard 1.25\" focuser, providing sharp, high-contrast images of the moon, planets, and brighter deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Classic General-Purpose Optic: The 25mm, 40° View\u003c\/h3\u003e\n\u003cp\u003eWith a 25mm focal length, this eyepiece provides low-to-moderate magnification that is ideal for locating objects and observing larger star clusters and nebulae. The 40-degree apparent field of view is a hallmark of the Plossl design, offering a sharp, well-corrected image across the entire field, a noticeable improvement over simpler 2- or 3-element eyepieces.\u003c\/p\u003e\n\u003cp\u003eThis combination makes the 25mm Plossl a workhorse for any telescope. It's an excellent choice for viewing the entire lunar disc, tracking Jupiter and its moons, or framing open clusters like the Pleiades (M45) within a rich, dark background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMaximizing Contrast: 4 Elements with FMC Coatings\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece's optical system consists of a 4-element design arranged in 2 groups, a configuration known for producing high-contrast views with minimal internal reflections. To further enhance this, all air-to-glass surfaces are fully multi-coated (FMC), increasing light transmission for brighter images. The lens edges are also blackened to absorb stray light that can reduce contrast and wash out faint details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Multi-Coated Lenses:\u003c\/strong\u003e Reduces light loss, resulting in brighter views of faint objects like the Orion Nebula (M42) compared to single-coated or uncoated optics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlackened Lens Edges:\u003c\/strong\u003e Improves contrast by preventing off-axis light from scattering within the eyepiece, making it easier to see fine details on planetary surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRubber Eye Guard:\u003c\/strong\u003e Blocks ambient light and allows you to comfortably position your eye for a stable view. The 79g weight ensures it won't create balance issues on smaller telescopes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSVBONY 25mm Plossl vs. Standard Kit Eyepieces\u003c\/h3\u003e\n\u003cp\u003eMany beginner telescopes are supplied with basic Kellner or Huygens eyepieces. The SVBONY 25mm Plossl represents a significant and affordable upgrade over these stock accessories. The primary differences lie in the optical design and coatings.\u003c\/p\u003e\n\u003cp\u003eThe Plossl's 4-element design provides superior correction for optical aberrations compared to 3-element Kellners, resulting in sharper stars at the edge of the field. Furthermore, the Fully Multi-Coated optics transmit significantly more light, making every object appear brighter and more detailed. For a small investment, this eyepiece can dramatically improve the views from your existing telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat views can I expect with the SVBONY 25mm Plossl in an 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a typical 8\" f\/10 Schmidt-Cassegrain Telescope (SCT) with a 2032mm focal length, the SVBONY 25mm Plossl will provide 81x magnification. This is an excellent magnification for viewing globular clusters like the Hercules Cluster (M13), resolving planetary details on Jupiter and Saturn, and observing medium-sized galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SVBONY 25mm Plossl perform on the Andromeda Galaxy (M31) in a small refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a short focal length refractor, like a 72mm f\/6, this eyepiece will yield low power (around 17x). This provides a wide true field of view, perfect for framing large objects. You'll be able to see the bright core of the Andromeda Galaxy (M31) and its satellite galaxies M32 and M110 all in the same field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 40-degree field of view of the SVBONY 25mm Plossl a limitation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the 40-degree apparent field is narrower than more expensive wide-field eyepieces, it is a deliberate trade-off of the Plossl design. This focus allows for excellent sharpness, high contrast, and good control of optical aberrations with only 4 lens elements. It provides a clean, classic \"porthole\" view into space that many observers appreciate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose a prime eyepiece like the SVBONY 25mm Plossl over a zoom eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA prime (fixed focal length) eyepiece like this 25mm Plossl generally offers better optical quality for the price than a zoom eyepiece. With fewer moving parts and a simpler optical path, it typically delivers sharper, higher-contrast images. While a zoom offers convenience, a good quality Plossl often provides a superior viewing experience at its specific magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the threads on the SVBONY 25mm Plossl compatible with standard filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The eyepiece features standard \u003cstrong\u003eM28.5*0.6 threads\u003c\/strong\u003e on the inside of the 1.25\" barrel. This allows you to attach any standard 1.25\" astronomical filter, such as a Moon filter for lunar observing or a light pollution filter for enhancing deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the SVBONY 25mm Plossl a good \"first upgrade\" eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt's an ideal first upgrade because it offers a noticeable improvement in brightness, contrast, and sharpness over the basic eyepieces included with most beginner telescopes, without a high cost. Its 25mm focal length is extremely versatile, making it useful for nearly any type of celestial object.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Type\u003c\/td\u003e\n\u003ctd\u003ePlossl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003e4 Elements in 2 Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e40°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6 (Standard 1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlackened Lens Edges\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRubber Eye Guard\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e72mm \/ 2.82in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e79g \/ 2.8oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSVBONY Plossl 25mm Eyepiece\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861229039901,"sku":"SV-F9149A","price":22.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-Plossl-Metal-FMC-Eyepieces-25mm-1-25inch-1_dd4d7fca-12b1-40be-ae0f-5bb97ddca409.jpg?v=1788659635","url":"https:\/\/davidastro.com\/fr\/products\/svbony-25mm-plossl-metal-fmc-eyepiece-125in","provider":"David Astro","version":"1.0","type":"link"}