{"product_id":"nikon-pk-13-ai-macro-extension-tube-55mm-lens","title":"Nikon PK-13 AI Auto Extension Tube","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cstrong\u003eWHAT CONDITION THE CONDITION IS IN: 88-Day Confirmed Operation Warranty. Clean and pristine. Some minor wear marks, only noted for full disclosure. Scroll down if you want to learn about the design, performance, and story behind it. Or don’t. It’ll be here either way.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Nikon PK-13 is a 27.5mm extension tube. It is all-metal, glassless, and constitutionally unbothered by trends. It arrived as part of \u003ca href=\"https:\/\/www.foxandtalbot.com\/collections\/nikon-f-mount\" title=\"Shop our Nikon F mount lenses\"\u003eNikon\u003c\/a\u003e's AI system, adding the mechanical coupling that let cameras meter wide open. This was a civilizing upgrade over its predecessors, though it would never brag about it.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eIt's officially archived, which is the corporate way of saying retired. Except nobody told the PK-13, because it's still the tool of choice for anyone scanning 35mm film at true 1:1 life-size. Paired with a 55mm Micro-Nikkor that can't quite get there alone, the tube provides the missing 27.5mm of ambition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThere's no glass inside, so image quality remains entirely the lens's responsibility. You'll surrender two stops of light at full magnification, which is, as with most things worth doing, a fair trade. It plays beautifully with AI, AI-S, and AF-D lenses. It has no patience for G or E-types without aperture rings, and one suspects the feeling is mutual.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe working distance at 1:1 is a mere five centimetres. That's close enough to make lighting genuinely difficult, which is the PK-13's way of reminding you that intimacy always comes with complications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis particular example wears its years lightly, lettering still crisp, which feels right for something that was built not to impress, but to endure.\u003c\/span\u003e\u003c\/p\u003e","brand":"Nikon","offers":[{"title":"Default Title","offer_id":48274270060731,"sku":"35MM-NIKO-100226","price":38.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0645\/6960\/6331\/files\/download_45afa46b-9542-405b-9e02-2f69eb8bd1cd.jpg?v=1787244059","url":"https:\/\/www.foxandtalbot.com\/products\/nikon-pk-13-ai-macro-extension-tube-55mm-lens","provider":"Fox and Talbot Cameras","version":"1.0","type":"link"}