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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Photonics Russia</journal-id><journal-title-group><journal-title xml:lang="en">Photonics Russia</journal-title><trans-title-group xml:lang="ru"><trans-title>Фотоника</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1993-7296</issn><issn publication-format="electronic">2686-844X</issn><publisher><publisher-name xml:lang="en">Technosphera JSC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">682916</article-id><article-id pub-id-type="doi">10.22184/1993-7296.FRos.2025.19.3.224.231</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Optical Devices &amp; Systems</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оптические устройства и системы</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Inner Focusing Lens</article-title><trans-title-group xml:lang="ru"><trans-title>Объективы с внутренней фокусировкой</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4592-1060</contrib-id><name-alternatives><name xml:lang="en"><surname>Shishkin</surname><given-names>Igor P.</given-names></name><name xml:lang="ru"><surname>Шишкин</surname><given-names>Игорь Петрович</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>Cand. of Tech. Sciences</p></bio><bio xml:lang="ru"><p>к. т. н.</p></bio><email>shipoflens@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shkadarevich</surname><given-names>Alexey P.</given-names></name><name xml:lang="ru"><surname>Шкадаревич</surname><given-names>Алексей Петрович</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>Dr. of Tech. Sciences</p></bio><bio xml:lang="ru"><p>д. т. н.</p></bio><email>shipoflens@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">NTC “LEMT” BeloMO</institution></aff><aff><institution xml:lang="ru">НТЦ «ЛЭМТ» БелОМО</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-06-05" publication-format="electronic"><day>05</day><month>06</month><year>2025</year></pub-date><volume>19</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru">180-246</issue-title><fpage>224</fpage><lpage>231</lpage><history><date date-type="received" iso-8601-date="2025-06-04"><day>04</day><month>06</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-06-04"><day>04</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Shishkin I.P., Shkadarevich A.P.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Шишкин И.П., Шкадаревич А.П.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Shishkin I.P., Shkadarevich A.P.</copyright-holder><copyright-holder xml:lang="ru">Шишкин И.П., Шкадаревич А.П.</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/1993-7296/article/view/682916">https://journals.eco-vector.com/1993-7296/article/view/682916</self-uri><abstract xml:lang="en"><p>The article describes the design of inner focusing lenses. Lenses can be used in surveillance devices, night vision devices, for application in machine vision systems, in photography and other fields. Wide-angle lens with a focal length of 16 mm and an aperture of F / 1.8, fast lens with a focal length of 26 mm and an aperture of F / 1.2, lens with a focal length of 50 mm and an aperture of F / 1.4, lens with a focal length of 100 mm and an aperture of F / 2.8, telephoto lens with a focal length of 200 mm and an aperture of F / 4, as well as for comparison a lens with a variable focal length of 10–300 mm and an aperture of F / 1.6–4.5.</p></abstract><trans-abstract xml:lang="ru"><p>В статье дано описание конструкции объективов с фиксированным фокусным расстоянием и с внутренней фокусировкой, которая осуществляется с помощью одной линзы. Такие объективы найдут применение в приборах наблюдения, приборах ночного видения, устройствах машинного зрения, в фотографии и некоторых других областях. Представлены объективы с фиксированным фокусным расстоянием: широкоугольный с фокусным расстоянием 16 мм и светосилой F / 1,8, с фокусным расстоянием 26 мм и светосилой F / 1,2; с фокусным расстоянием 50 мм и светосилой F / 1,4; с фокусным расстоянием 100 мм и светосилой F / 2,8; с фокусным расстоянием 200 мм и светосилой F / 4, а также для сравнения объектив с переменным фокусным расстоянием 10–300 мм и светосилой F / 1,6–4,5.</p></trans-abstract><kwd-group xml:lang="en"><kwd>inner focusing lens</kwd><kwd>television lens</kwd><kwd>surveillance devices</kwd><kwd>night vision devices</kwd><kwd>machine vision</kwd><kwd>photography</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>объективы c внутренней фокусировкой</kwd><kwd>телевизионные объективы</kwd><kwd>приборы наблюдения</kwd><kwd>приборы ночного видения</kwd><kwd>машинное зрение</kwd><kwd>фотография</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Choi and J. 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