{"product_id":"52-series-waterproof-eyepiece","title":"52° Series Waterproof Eyepiece","description":"\u003cdiv class=\"kt-page\"\u003e\n\n\u003cstyle\u003e\n.kt-page{--kt-accent:#00A1CF;--kt-accent-hover:#008DB7;max-width:1100px;margin:0 auto;font-family:inherit;}\n.kt-page .kt-hero{display:flex;align-items:center;gap:40px;margin-bottom:36px;}\n.kt-page .kt-hero-copy{flex:1 1 55%;}\n.kt-page .kt-hero-img{flex:1 1 40%;text-align:center;}\n.kt-page .kt-sq{width:100%;max-width:420px;aspect-ratio:1\/1;margin:0 auto;background:#ffffff;border-radius:6px;display:flex;align-items:center;justify-content:center;overflow:hidden;}\n.kt-page .kt-sq img{max-width:92%;max-height:92%;width:auto;height:auto;object-fit:contain;}\n.kt-page .kt-hero-copy h2{font-size:26px;margin-bottom:14px;}\n.kt-page .kt-hero-copy p{font-size:16px;line-height:1.6;margin-bottom:14px;}\n.kt-page .kt-features{display:flex;align-items:flex-start;gap:40px;margin:40px 0;}\n.kt-page .kt-features-copy{flex:1 1 55%;}\n.kt-page .kt-features-img{flex:1 1 40%;text-align:center;}\n.kt-page .kt-section-heading{font-size:21px;display:inline-block;padding-bottom:8px;border-bottom:2px solid var(--kt-accent);margin-bottom:18px;}\n.kt-page .kt-feature-list{list-style:none;margin:0;padding:0;}\n.kt-page .kt-feature-list li{font-size:16px;line-height:1.5;margin-bottom:12px;padding-left:26px;position:relative;}\n.kt-page .kt-feature-list li:before{content:\"\\2713\";color:var(--kt-accent);font-weight:bold;position:absolute;left:0;}\n.kt-page .kt-feature-list b{color:#222;}\n.kt-page .kt-specs-wrap{box-sizing:border-box;padding:0 24px;}\n.kt-page .kt-specs{width:100%;border-collapse:collapse;margin:30px 0;font-size:15px;}\n.kt-page .kt-specs th,.kt-page .kt-specs td{border:2px solid #000;padding:10px 12px;text-align:left;}\n.kt-page .kt-specs th{background:#00A1CF;color:#fff;font-size:16px;}\n.kt-page .kt-specs tr:nth-child(even){background:#f2f2f2;}\n.kt-page .kt-specs tr:nth-child(odd){background:#ffffff;}\n.kt-page .kt-cta{text-align:center;margin:40px 0;font-size:18px;font-weight:bold;}\n.kt-page .kt-cta-buttons{display:flex;justify-content:center;gap:16px;margin-top:16px;flex-wrap:wrap;}\n.kt-page .kt-cta-buttons a{display:inline-block;padding:12px 26px;border:2px solid #00A1CF;border-radius:4px;color:#00A1CF;text-decoration:none;font-weight:bold;font-size:15px;transition:all .15s ease;}\n.kt-page .kt-cta-buttons a:hover{background:#00A1CF;color:#fff;}\n.kt-page .kt-manuals a{display:block;color:#00A1CF;font-weight:bold;font-size:30px;text-align:left;text-decoration:none;margin-bottom:10px;}\n.kt-page .kt-manuals a:hover{color:#008DB7;}\n@media (max-width:768px){\n  .kt-page .kt-hero,.kt-page .kt-features{flex-direction:column;}\n  .kt-page .kt-hero-img img,.kt-page .kt-features-img img{max-width:400px;}\n  .kt-page .kt-hero-copy p,.kt-page .kt-features-copy p{font-size:17px;}\n  .kt-page .kt-cta-buttons{display:grid;grid-template-columns:1fr 1fr;gap:12px;}\n  .kt-page .kt-cta-buttons a:nth-child(3){grid-column:1 \/ span 2;}\n  .kt-page .kt-manuals a{font-size:24px;}\n}\n\u003c\/style\u003e\n\n\u003cdiv class=\"kt-hero\"\u003e\n  \u003cdiv class=\"kt-hero-copy\"\u003e\n    \u003ch2\u003eAffordable Flat-Field Eyepieces with a Wide 52° View\u003c\/h2\u003e\n    \u003cp\u003eThe 52° Series delivers exceptional quality and value versus a comparably priced Plossl, with flat-field, multi-element optics that hold sharp, high-contrast images all the way to the field edge.\u003c\/p\u003e\n\u003cp\u003eEvery eyepiece in the series is inert gas argon-purged for a fully waterproof, fog-proof design, and fully EMD (Enhanced Multi-Layer Deposition) coated with edge-blackened lens elements for maximum contrast.\u003c\/p\u003e\n\u003cp\u003eNine focal lengths, from 3mm for high-power planetary and double-star work up to a wide 40mm for expansive low-power views, let you build a complete eyepiece set within one consistent, affordable series.\u003c\/p\u003e\n\n  \u003c\/div\u003e\n  \u003cdiv class=\"kt-hero-img\"\u003e\n    \u003cdiv class=\"kt-sq\"\u003e\n      \u003cimg src=\"https:\/\/explorescientific.com\/cdn\/shop\/products\/EPWP5220-01_1.jpg\" alt=\"Explore Scientific 52 degree Series waterproof eyepiece\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"kt-features\"\u003e\n  \u003cdiv class=\"kt-features-copy\"\u003e\n    \u003ch3 class=\"kt-section-heading\"\u003eKey Features\u003c\/h3\u003e\n    \u003cul class=\"kt-feature-list\"\u003e\n      \u003cli\u003e\n\u003cb\u003e52° Apparent Field of View\u003c\/b\u003e - flat-field, multi-element design for sharp edge-to-edge views\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eArgon-Purged Waterproof Construction\u003c\/b\u003e - fog-proof and moisture-sealed for reliable outdoor use\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eFully EMD Multi-Coated Optics\u003c\/b\u003e - Enhanced Multi-Layer Deposition coatings for bright, high-contrast images\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eEdge-Blackened Lens Elements\u003c\/b\u003e - reduces internal reflections for improved contrast\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eNine Focal Lengths Available\u003c\/b\u003e - 3mm, 4.5mm, 6.5mm, 10mm, 15mm, 20mm, 25mm, 30mm, and 40mm\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003e1.25-Inch and 2-Inch Barrels\u003c\/b\u003e - 40mm model steps up to a 2-inch barrel for the widest true field\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kt-features-img\"\u003e\n    \u003cdiv class=\"kt-sq\"\u003e\n      \u003cimg src=\"https:\/\/explorescientific.com\/cdn\/shop\/products\/52D_Family_40102f19-b1df-4ec8-a3d7-93a50cbe46e2.jpg\" alt=\"Explore Scientific 52 degree Series eyepiece family lineup\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"kt-specs-wrap\" data-kt-specs-wrap\u003e\n\u003ctable class=\"kt-specs\"\u003e\n  \u003ctr\u003e\u003cth colspan=\"2\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e52 Degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eFlat-Field Multi-Element\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully EMD Multi-Layer Coated, Edge-Blackened Elements\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWaterproofing\u003c\/td\u003e\n\u003ctd\u003eArgon-Purged, Waterproof and Fog-Proof\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25-Inch O.D. (3mm-30mm); 2-Inch O.D. (40mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFocal Lengths Available\u003c\/td\u003e\n\u003ctd\u003e3mm, 4.5mm, 6.5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003eComfortable eye relief that increases with focal length (approx. 15mm at 3mm, longest at 40mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLimited warranty, activated with registration within 60 days of purchase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\n(function(){\n  function fitWrap(wrap){\n    var container = wrap.closest('.product--container') || wrap.closest('.page-content') || wrap.closest('.product--outer');\n    if(!container){ wrap.style.marginLeft=''; wrap.style.width=''; return; }\n    var cRect = container.getBoundingClientRect();\n    var pRect = wrap.parentNode.getBoundingClientRect();\n    var leftOffset = pRect.left - cRect.left;\n    wrap.style.marginLeft = (-leftOffset) + 'px';\n    wrap.style.width = cRect.width + 'px';\n  }\n  function fitAll(){\n    var wraps = document.querySelectorAll('[data-kt-specs-wrap]');\n    for (var i = 0; i \u003c wraps.length; i++) { fitWrap(wraps[i]); }\n  }\n  if (document.readyState === 'loading') {\n    document.addEventListener('DOMContentLoaded', fitAll);\n  } else {\n    fitAll();\n  }\n  window.addEventListener('resize', fitAll);\n  window.addEventListener('load', fitAll);\n})();\n\u003c\/script\u003e\n\n\n\n\u003cp class=\"kt-cta\"\u003e\n  Talk to a Specialist\n  \u003cspan class=\"kt-cta-buttons\"\u003e\n    \u003ca href=\"\/pages\/contact\" style=\"display:inline-block;padding:12px 26px;border:2px solid #00A1CF;border-radius:4px;color:#00A1CF;text-decoration:none;font-weight:bold;\"\u003eContact Us\u003c\/a\u003e\n    \u003ca href=\"mailto:sales@telescopedepot.com\" style=\"display:inline-block;padding:12px 26px;border:2px solid #00A1CF;border-radius:4px;color:#00A1CF;text-decoration:none;font-weight:bold;\"\u003eEmail a Specialist\u003c\/a\u003e\n    \u003ca href=\"\/pages\/shipping\" style=\"display:inline-block;padding:12px 26px;border:2px solid #00A1CF;border-radius:4px;color:#00A1CF;text-decoration:none;font-weight:bold;\"\u003eShipping Info\u003c\/a\u003e\n  \u003c\/span\u003e\n\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Explore Scientific","offers":[{"title":"3mm","offer_id":53875779764335,"sku":"EPWP5203-01","price":59.0,"currency_code":"USD","in_stock":true},{"title":"4.5mm","offer_id":53875779797103,"sku":"EPWP5245-01","price":59.0,"currency_code":"USD","in_stock":true},{"title":"6.5mm","offer_id":53875779829871,"sku":"EPWP5265-01","price":59.0,"currency_code":"USD","in_stock":true},{"title":"10mm","offer_id":53875779862639,"sku":"EPWP5210-01","price":59.0,"currency_code":"USD","in_stock":true},{"title":"15mm","offer_id":53875779895407,"sku":"EPWP5215-01","price":59.0,"currency_code":"USD","in_stock":true},{"title":"20mm","offer_id":53875779928175,"sku":"EPWP5220-01","price":59.0,"currency_code":"USD","in_stock":true},{"title":"25mm","offer_id":53875779960943,"sku":"EPWP5225-01","price":59.0,"currency_code":"USD","in_stock":true},{"title":"30mm","offer_id":53875779993711,"sku":"EPWP5230-01","price":69.0,"currency_code":"USD","in_stock":true},{"title":"40mm","offer_id":53875780026479,"sku":"EPWP5240-01","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/7968\/0367\/files\/EPWP5220-01_1.jpg?v=1784838730","url":"https:\/\/telescopedepot.com\/products\/52-series-waterproof-eyepiece","provider":"Telescope Depot","version":"1.0","type":"link"}