{"product_id":"custom-adapted-ro-108-1-90mm-f-2-cinematic-lens-red-p-coating-m42-portrait-focus-only","title":"Custom Adapted RO-108-1 90mm f\/2 Cinematic Lens | Red \"P\" Coating | M42 | (Portrait Only \/ As-Is)","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eElevate your photography with a truly unique piece of Soviet cinematic history. This is a classic RO-108-1 (РО-108-1) 90mm f\/2 film projection lens, originally designed to project 35mm movies in large cinemas. Today, we’ve given it a new life by custom-mounting this robust optical block into a high-precision focusing helicoid.\u003c\/p\u003e\n\n\u003cp\u003eEquipped with the premium early \u003cstrong\u003eRed \"P\" (П)\u003c\/strong\u003e anti-reflective coating, this lens delivers unbelievable subject separation, a dreamy vintage glow, and character-rich, swirly bokeh that modern clinical lenses simply cannot replicate.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ EXPERIMENTAL LENS – SOLD \"AS IS\" (Portrait \u0026amp; Close-Up Only):\u003c\/strong\u003e Please read carefully before purchasing. Due to the highly specific, custom-adapted nature of this cinema projection block, this lens does \u003cstrong\u003eNOT focus to infinity\u003c\/strong\u003e and has no adjustable aperture. It is strictly an experimental tool crafted for stunning bust-level portraits (head and shoulders) and close-up macro details. Because of its unique, non-standard optical characteristics and heavy vintage condition, this item is sold strictly \"AS IS\" for creative photography. Please ensure you fully understand these limitations before buying.\u003c\/p\u003e\n\n\u003ch3\u003eWhy This Specific Version is Special:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e• Dedicated Portrait Specialist:\u003c\/strong\u003e As mentioned above, it is designed solely for close-up and portrait work, offering a unique shooting experience you won't find in standard lenses.\u003cbr\u003e\n\u003cstrong\u003e• True Cinematic Fixed Aperture:\u003c\/strong\u003e Built for projection, it shoots wide open at an incredibly fast f\/2.0 at all times, ensuring maximum background blur and a distinct 35mm film aesthetic.\u003cbr\u003e\n\u003cstrong\u003e• Custom M42 Adaptation:\u003c\/strong\u003e Professionally fitted with a brand-new aluminum focusing helicoid, bridging the gap between vintage cinema projection and your modern digital camera.\u003cbr\u003e\n\u003cstrong\u003e• Early Premium Quality:\u003c\/strong\u003e Features the iconic Red \"P\" coating, known for its distinct color rendering and classic vintage contrast.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility (DSLR \u0026amp; Mirrorless Cameras)\u003c\/h3\u003e\n\u003cp\u003eBecause this lens features a custom M42 screw mount, it is incredibly easy to adapt for its intended portrait\/macro purposes:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e• DSLR Cameras:\u003c\/strong\u003e Can be adapted for portrait\/macro work to systems like Canon EF, Pentax K, and others using a simple, affordable M42 adapter.\u003cbr\u003e\n\u003cstrong\u003e• Mirrorless Cameras:\u003c\/strong\u003e Works flawlessly for close-up and portrait photography on all modern systems via an M42 adapter, including Sony E-mount, Fujifilm X, Canon RF, Nikon Z, Leica L, and Micro Four Thirds.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e• Focal Length:\u003c\/strong\u003e 90mm\u003cbr\u003e\n\u003cstrong\u003e• Aperture Range:\u003c\/strong\u003e Fixed f\/2.0 (No internal iris)\u003cbr\u003e\n\u003cstrong\u003e• Optical Design:\u003c\/strong\u003e 35mm Cinema Projection Block\u003cbr\u003e\n\u003cstrong\u003e• Lens Mount:\u003c\/strong\u003e M42 Screw Mount (via Custom Helicoid)\u003cbr\u003e\n\u003cstrong\u003e• Focus Range:\u003c\/strong\u003e Close-up and Bust-Portraits only (NO infinity focus)\u003cbr\u003e\n\u003cstrong\u003e• Aperture Blades:\u003c\/strong\u003e None (Shoots wide open)\u003cbr\u003e\n\u003cstrong\u003e• Filter Diameter:\u003c\/strong\u003e None (No front filter thread)\u003cbr\u003e\n\u003cstrong\u003e• Sensor Coverage:\u003c\/strong\u003e Full Frame \/ 35mm Film\u003cbr\u003e\n\u003cstrong\u003e• Body Material:\u003c\/strong\u003e Original metal barrel + Aircraft-grade Aluminum helicoid\u003cbr\u003e\n\u003cstrong\u003e• Weight:\u003c\/strong\u003e 379 g (13.4 oz)\u003cbr\u003e\n\u003cstrong\u003e• Manufacturer:\u003c\/strong\u003e USSR Cinema Industry\u003cbr\u003e\n\u003cstrong\u003e• Serial Number:\u003c\/strong\u003e 610649\u003cbr\u003e\n\u003cstrong\u003e• Focus Type:\u003c\/strong\u003e Manual Focus Only\u003c\/p\u003e\n\n\u003ch3\u003eCondition Report\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e• Sale Terms:\u003c\/strong\u003e Sold \"AS IS\" due to its experimental, custom-adapted nature and fixed limitations.\u003cbr\u003e\n\u003cstrong\u003e• Optics:\u003c\/strong\u003e Excellent vintage condition. The glass elements are clean and clear. No fungus, no heavy scratches, no separation, and no haze. \u003cem\u003eNote: As with any vintage lens, minor internal micro-dust particles may be visible under harsh light, which is completely normal and has zero impact on image quality.\u003c\/em\u003e\u003cbr\u003e\n\u003cstrong\u003e• Mechanics:\u003c\/strong\u003e The newly added custom helicoid manual focus ring turns smoothly and evenly throughout its specific portrait\/macro range.\u003cbr\u003e\n\u003cstrong\u003e• Cosmetics:\u003c\/strong\u003e Authentic \"battle-scarred\" vintage condition. While the custom silver helicoid is brand new, the original black projector barrel shows noticeable paint wear, scratches, and heavy patina consistent with decades of use in a cinema booth. We love this look — it tells a true story of its cinematic past!\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: All photos shown in this listing are actual high-resolution images of the specific lens you will receive.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhat’s Included in the Box:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1.\u003c\/strong\u003e RO-108-1 90mm f\/2 Lens Block with Custom M42 Helicoid\u003cbr\u003e\n\u003cstrong\u003e2.\u003c\/strong\u003e Front and Rear Lens Caps\u003cbr\u003e\n\u003cstrong\u003e3.\u003c\/strong\u003e High-Quality Hard Case (Non-original, but a very sturdy, premium custom-fit case for safe storage)\u003c\/p\u003e","brand":"HelicoidPrime","offers":[{"title":"Default Title","offer_id":45339823243333,"sku":"RO-108-1-90-F2-M42","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/4665\/0949\/files\/photo_2026-07-1204.44.41.jpg?v=1783873385","url":"https:\/\/helicoidprime.myshopify.com\/products\/custom-adapted-ro-108-1-90mm-f-2-cinematic-lens-red-p-coating-m42-portrait-focus-only","provider":"HelicoidPrime","version":"1.0","type":"link"}