Pentax 12.5-75mm 1:1.8 Manual TV Zoom Lens

Model: C31204 (Industrial Line) | C-Mount Macro Extension / Spacer Ring 

Welcome to My eBay Store

I am an independent electronics seller specialising in digital cameras, dictaphones, office and conference equipment, audio devices, and other technology products. My aim is to provide honest listings, fair prices, secure packaging, and friendly customer service. All items are tested where possible and described as accurately as possible. 

Please feel free to message me with any questions. I’m generally available Monday to Friday, 8am–6pm, and always do my best to reply promptly. I also check messages outside these hours and at weekends whenever possible.

Item Description

Pentax 12.5-75mm 1:1.8 Manual TV Zoom Lens
Model: C31204 (Industrial Line)
Condition: Used – Fully Tested and Working. Please inspect all photographs carefully as they form part of the description and should be used to assess the cosmetic condition of the item.

Available for purchase is a genuine Pentax 12.5-75mm manual TV zoom lens. This lens has been fully bench-tested and is in excellent working order. The manual focus ring pulls smoothly, the focal length zoom mechanism slides cleanly through the entire 12.5mm to 75mm range, and the manual aperture iris opens and closes flawlessly with crisp click-stops. The internal glass elements are clean and free from dust, fungus, and scratching.

This is a premium, industrial-grade piece of glass designed for a 2/3-inch image format. It features a standard threaded C-Mount, making it highly sought after for industrial machine vision systems, laboratory microscopic inspection rigs, security CCTV networks, or for creative filmmakers adapting retro TV glass onto modern mirrorless digital camera bodies (like Micro Four Thirds).

• Fully Working: Thoroughly checked for clean mechanical rotation, smooth dampening, and clear optical transparency.
• Fast f/1.8 Aperture: Wide maximum aperture allows for excellent low-light performance and shallow depth-of-field separation.
• 6x Manual Zoom Range: Offers exceptional framing versatility, transitioning smoothly from a 12.5mm wide-angle perspective up to a 75mm telephoto tight shot.
• Bonus Extension Tube: Includes a removable metal C-mount macro spacer ring to allow for extreme close-up magnification work.
• Industrial Precision Build: Heavy-duty all-metal barrel chassis designed for high durability and continuous operation in commercial setups.

🛠️ Key Features

• Native C-Mount Interface: Features standard 1-inch (25mm) diameter screw-threading compatible with thousands of commercial and medical imaging systems.
• High-Contrast Optics: Engineered with premium Pentax multi-coated glass to minimise geometric distortion and flare.
• Standard Filter Thread: Features a front 49mm filter thread rim to easily accommodate protective UV filters, polarisers, or step-up adapter rings.

Testing & Functionality

• All items are fully tested to the best of my ability and confirmed to be in working order unless otherwise stated within the listing description.
• Please carefully inspect all photographs provided, as they form part of the item description and should be used to assess the cosmetic condition of the item before purchase.
• Any faults, missing parts, damage, modifications, or significant cosmetic marks will be clearly mentioned in the description and photographed where possible.
• As many items are pre-owned or vintage electronics, some cosmetic signs of previous use should be expected unless described as new.

Serial numbers and identifying marks are recorded where applicable for security purposes and to protect both buyer and seller.

What's Included

Only items shown in the photographs are included unless otherwise stated in the listing description.

Postage & Delivery Information

I aim to keep postage prices fair, transparent, and as low as possible while ensuring your order arrives safely and quickly.

All items are securely packaged and dispatched using trusted delivery services including Royal Mail Tracked and DPD.

To help reduce waste and keep costs down, I reuse and recycle boxes and packaging materials wherever possible. This helps minimise environmental impact while keeping postage costs affordable.

Where applicable, I offer FREE postage on additional items, helping you save money when purchasing multiple products.

Orders are typically dispatched within 1-2 working days. Postage runs are normally carried out every Monday, Wednesday, and Friday, with same-day dispatch available for orders placed before 2pm on these days. Where possible, I am also happy to arrange earlier dispatch upon request.

All postage and packaging charges reflect the actual costs of shipping materials and delivery services.

If you have any questions regarding delivery times, combined postage, or special shipping requirements, please feel free to send me a message before purchasing.

Returns Policy

• Returns accepted within 30 days of delivery.
• Items must be returned in the same condition received.
• All original packaging, accessories, manuals and inserts must be included where applicable.
• New or sealed items must be returned unused, unopened and in original condition.
• Buyers are responsible for return postage costs on change-of-mind returns.
• If an item arrives faulty or not as described, please get in touch and I will work quickly to resolve the issue.

Please contact me before opening a return request if you have any questions or concerns.