{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8526118","patent":{"patent_number":"US-8526118","title":"Zoom lens and image capturing apparatus","assignee":null,"inventors":[],"filing_date":"2011-10-05T00:00:00.000Z","publication_date":"2013-09-03T00:00:00.000Z","cpc_codes":["H04N"],"num_claims":20,"abstract":"An inner focus type zoom lens includes a first lens group that has positive refracting power and is normally located at a fixed position, a second lens group that has negative refracting power and is movable in an optical axis direction for zooming, a third lens group that has positive refracting power, a fourth lens group that is movable for correction of a focal position due to the zooming and for focusing, and a fifth lens group that has positive refracting power, in order from an object side, wherein the first lens group includes a negative lens, a first positive lens, and a second positive lens arranged in order from the object side, wherein a first face of the negative lens has a shape of a concave surface turned on the object side, and wherein the zoom lens satisfies the following conditional equation (1) −10.0<G1R1/fw<−3.0."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Zoom lens and image capturing apparatus","description":"An inner focus type zoom lens includes a first lens group that has positive refracting power and is normally located at a fixed position, a second lens group that has negative refracting power and is ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8526118","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-8526118","citation_suggestion":"Patentable. \"Zoom lens and image capturing apparatus\" (US-8526118). https://patentable.app/patents/US-8526118","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8526118","json":"https://patentable.app/api/llm-context/US-8526118","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T15:35:52.436Z"}