{"product_id":"leica-m-16-18-21-f4-0-asph","title":"Leica M 16-18-21 f4.0 ASPH","description":"\u003ch2\u003eLeica M 16-18-21 f4.0 ASPH\u003c\/h2\u003e\n\u003cp\u003eWith its impressive angle of view of 107°, this lens conquers 16mm super wide-angle photography in perfect Leica M style. Due to the minimal distortion and barely perceptible field curvature, it can be recommended for highly demanding architecture photography even at the 16mm setting. The Tri-Elmar-M 16-18-21mm f\/4 ASPH. unites three super wide-angle focal lengths in one compact lens.\u003c\/p\u003e\n\u003cp\u003eThe ultra compact shape is achieved by two aspherical elements. A new design of the interior focusing significantly enhances the quality in the close-focus range through an adaption of the floating element principle. Brilliant depth of field can therefore be used from a distance of 0.33m for hyperfocal photography.\u003c\/p\u003e\n\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6961572b-9bb4-8323-b74c-7c427ed9c796-136\" data-testid=\"conversation-turn-372\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"fcbdd77c-3f63-4bb3-a383-c90f9bdb6127\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-mini\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words light markdown-new-styling\"\u003e\n\u003ch5 data-start=\"119\" data-end=\"149\"\u003eWhat Our Experts Think\u003c\/h5\u003e\n\u003cul data-start=\"150\" data-end=\"560\"\u003e\n\u003cli data-start=\"150\" data-end=\"240\"\u003e\n\u003cp data-start=\"152\" data-end=\"240\"\u003eUltra‑wide trinity zoom covers 16‑18‑21mm for landscapes, architecture, and interiors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"241\" data-end=\"327\"\u003e\n\u003cp data-start=\"243\" data-end=\"327\"\u003eASPH optics deliver excellent sharpness and high contrast with minimal distortion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"328\" data-end=\"405\"\u003e\n\u003cp data-start=\"330\" data-end=\"405\"\u003eCompact zoom design offers versatility without sacrificing image quality.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"406\" data-end=\"477\"\u003e\n\u003cp data-start=\"408\" data-end=\"477\"\u003eDurable Leica construction built for long‑lasting professional use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"478\" data-end=\"560\"\u003e\n\u003cp data-start=\"480\" data-end=\"560\"\u003eIdeal for photographers seeking wide perspectives with consistent performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 data-start=\"562\" data-end=\"573\"\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cul data-start=\"574\" data-end=\"1040\"\u003e\n\u003cli data-start=\"574\" data-end=\"667\"\u003e\n\u003cp data-start=\"576\" data-end=\"667\"\u003e\u003cstrong data-start=\"576\" data-end=\"582\"\u003eQ:\u003c\/strong\u003e Which cameras is it compatible with?\u003cbr data-start=\"619\" data-end=\"622\"\u003e\u003cstrong data-start=\"624\" data-end=\"630\"\u003eA:\u003c\/strong\u003e Leica M‑mount rangefinder cameras.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"668\" data-end=\"810\"\u003e\n\u003cp data-start=\"670\" data-end=\"810\"\u003e\u003cstrong data-start=\"670\" data-end=\"676\"\u003eQ:\u003c\/strong\u003e Is it good in low‑light situations?\u003cbr data-start=\"712\" data-end=\"715\"\u003e\u003cstrong data-start=\"717\" data-end=\"723\"\u003eA:\u003c\/strong\u003e Best in good to moderate light; f4 aperture balances depth of field and portability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"811\" data-end=\"929\"\u003e\n\u003cp data-start=\"813\" data-end=\"929\"\u003e\u003cstrong data-start=\"813\" data-end=\"819\"\u003eQ:\u003c\/strong\u003e Does it control distortion?\u003cbr data-start=\"847\" data-end=\"850\"\u003e\u003cstrong data-start=\"852\" data-end=\"858\"\u003eA:\u003c\/strong\u003e Yes, ASPH optical design minimizes distortion across the zoom range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"930\" data-end=\"1040\"\u003e\n\u003cp data-start=\"932\" data-end=\"1040\"\u003e\u003cstrong data-start=\"932\" data-end=\"938\"\u003eQ:\u003c\/strong\u003e Is this a zoom or prime lens?\u003cbr data-start=\"968\" data-end=\"971\"\u003e\u003cstrong data-start=\"973\" data-end=\"979\"\u003eA:\u003c\/strong\u003e Wide‑angle zoom covering three focal lengths (16\/18\/21mm).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 data-start=\"1042\" data-end=\"1066\"\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul data-start=\"1067\" data-end=\"1348\"\u003e\n\u003cli data-start=\"1067\" data-end=\"1115\"\u003e\n\u003cp data-start=\"1069\" data-end=\"1115\"\u003eKeep front and rear caps on when not in use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1116\" data-end=\"1187\"\u003e\n\u003cp data-start=\"1118\" data-end=\"1187\"\u003eClean optics gently with a microfiber cloth and lens‑safe solution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1188\" data-end=\"1231\"\u003e\n\u003cp data-start=\"1190\" data-end=\"1231\"\u003eAvoid touching glass elements directly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1232\" data-end=\"1282\"\u003e\n\u003cp data-start=\"1234\" data-end=\"1282\"\u003eStore in a dry, padded case to prevent damage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1283\" data-end=\"1348\"\u003e\n\u003cp data-start=\"1285\" data-end=\"1348\"\u003eCheck lens mount periodically for smooth and secure attachment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e","brand":"Leica","offers":[{"title":"Default Title","offer_id":45363169951804,"sku":"846","price":5291.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/6151\/5324\/files\/846-00_24_1b1e6c37-bd82-4463-9963-7fa90dd160b4.jpg?v=1778503306","url":"https:\/\/e-powergo.com\/products\/leica-m-16-18-21-f4-0-asph","provider":"Set Up Your Ultimate Retreat","version":"1.0","type":"link"}