{"product_id":"ultra-cat-108-5-element-petzval-refractor","title":"William Optics Ultra-Cat 108 Petzval Refractor","description":"\u003cdl\u003e\n\u003cdd\u003e\n\u003cp\u003eThe William Optics UltraCat108 is a cutting-edge 108mm apochromatic refractor designed for astrophotographers who demand top-tier performance. Featuring a 5-element advanced Petzval optical design and a fast f\/4.8 focal ratio, it delivers breathtaking edge-to-edge clarity and vivid detail, making it perfect for capturing expansive celestial views. Its robust build, exceptional optics, and innovative features redefine the standard for astrophotography.\u003c\/p\u003e\n\u003ch3\u003eKEY FEATURES:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced 5-Element Petzval Design\u003cbr\u003e\u003c\/strong\u003eEliminates field curvature, providing sharp, flat-field images without requiring additional flatteners.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e60mm Superior Image Circle\u003cbr\u003e\u003c\/strong\u003eFully supports full-frame and medium-format cameras for wide-field and detailed astrophotography, outperforming standard 106mm telescopes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eF\/4.8 Fast Optics\u003cbr\u003e\u003c\/strong\u003eOffers exceptional light-gathering capability for vibrant deep-sky photography.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWIFD (William’s Internal Focuser Design)\u003cbr\u003e\u003c\/strong\u003ePatented internal focuser ensures precise, stable, and hassle-free imaging, avoiding balance issues and eliminating vignetting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnti-Shrink Lens Cell Technology\u003cbr\u003e\u003c\/strong\u003eMinimizes thermal expansion and contraction, maintaining perfect optical alignment in any environment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSensor Tilt Corrector\u003cbr\u003e\u003c\/strong\u003eIntegrated and patented design eliminates distortion, optimizing sharpness and detail for professional-level results.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt-In Patented Bahtinov Mask\u003cbr\u003e\u003c\/strong\u003eSimplifies focusing for pinpoint precision, a feature that sets it apart from competitors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePatented Handle Bar Design\u003cbr\u003e\u003c\/strong\u003eCombines ergonomic usability with enhanced portability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePersonalized Laser Engraving\u003cbr\u003e\u003c\/strong\u003eFree customization for direct purchases, adding a personal touch to your telescope.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eDiagram Reports\u003c\/h2\u003e\n\u003cp\u003e\u003cimg class=\"filter-invert-bw\" width=\"100%\" height=\"auto\" src=\"https:\/\/williamoptics.com\/cdn\/shop\/files\/Diagram_UltraCat-108_SD100.jpg?v=1734417307\"\u003e\u003cimg class=\"filter-invert-bw\" width=\"100%\" height=\"auto\" src=\"https:\/\/williamoptics.com\/cdn\/shop\/files\/Diagram_UltraCat-108_LA.jpg?v=1744873636\"\u003e\u003cimg class=\"filter-invert-bw\" width=\"100%\" height=\"auto\" src=\"https:\/\/williamoptics.com\/cdn\/shop\/files\/Diagram_UltraCat-108_MTF.jpg?v=1732782890\"\u003e\u003cimg class=\"filter-invert-bw\" width=\"100%\" height=\"auto\" src=\"https:\/\/williamoptics.com\/cdn\/shop\/files\/Diagram_UltraCat-108_RI.jpg?v=1732782890\"\u003e\u003c\/p\u003e\n\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":51237552849184,"sku":"T-C-108BR","price":3998.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/image_3240e4ab-97ea-4419-aba5-a27348cddea0.png?v=1771048157","url":"https:\/\/firstlightastro.com\/products\/ultra-cat-108-5-element-petzval-refractor","provider":"First Light Astro","version":"1.0","type":"link"}