--- product_id: 661489524 title: "Optical Glass Objective Lens Concave&Convex Lens for DIY Astronomical Telescope 70mm" brand: "caume" price: "AR$170403" currency: ARS in_stock: true category: "Caume" url: https://www.desertcart.com.ar/products/661489524-optical-glass-objective-lens-concave-and-convex-lens-for-diy store_origin: AR region: Argentina --- # F7.1 focus ratio for sharp, precise imaging 70mm diameter for crisp celestial views Apochromatic double-separation optics for zero color fringing Optical Glass Objective Lens Concave&Convex Lens for DIY Astronomical Telescope 70mm **Brand:** caume **Price:** AR$170403 **Availability:** βœ… In Stock ## Summary > πŸ”­ Unlock the Universe: See Stars Like Never Before! ## Quick Answers - **What is this?** Optical Glass Objective Lens Concave&Convex Lens for DIY Astronomical Telescope 70mm by caume - **How much does it cost?** AR$170403 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/661489524-optical-glass-objective-lens-concave-and-convex-lens-for-diy) ## Best For - caume enthusiasts ## Why This Product - Trusted caume brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Versatile Compatibility:** Perfect for telescope objectives and parallel light pipeline instruments, compatible with Canon EF and Nikon F mounts. - β€’ **Precision Focused at 500mm:** Optimized 500mm focal length and F7.1 ratio deliver pinpoint accuracy for your DIY astronomical telescope projects. - β€’ **Crystal-Clear Cosmic Clarity:** Experience ultra-sharp, high-resolution images with apochromatic double-separation lenses that eliminate chromatic aberration. - β€’ **Tested for Stellar Consistency:** Each lens set is rigorously quality-checked via parallel light pipeline testing for flawless imaging every time. - β€’ **Built to Last, Built to Perform:** Durable optical glue bonding prevents yellowing and edge peeling, ensuring consistent performance over time. ## Overview The CAUME TianWen11WYJ03 is a premium 70mm diameter optical glass objective lens featuring an apochromatic double-separation design that ensures high imaging sharpness without chromatic aberration. With a fixed 500mm focal length and F7.1 aperture, it delivers precise, stable focus ideal for DIY astronomical telescopes. Its durable bonding prevents aging issues, and each lens is quality-tested for consistent performance, making it a top choice for serious amateur astronomers and optical instrument builders. ## Description desertcart.com : Optical Glass Objective Lens Concave&Convex Lens for DIY Astronomical Telescope 70mm : Electronics ## Features - Model:70mm, Diameter:72mm, Focus:500, Focusratio:F7.1, Film:Blue - The objective lenses are all equipped with apochromatic double-separation optical structure, and the two-piece apochromatic lenses have better compatibility with the bonded ones, resulting in high imaging sharpness with no worry about the aging of the photosensitive glue in the large-diameter objective lenses that may cause yellowing and edge peeling over time. - The objective lenses are tested and paired for imaging quality through a parallel light pipeline and dividing plate, ensuring that each set of objective lenses delivers consistent imaging performance. - High-resolution, low-dispersion objective lenses are the best choice for various applications such as telescope objective lenses and parallel light pipeline production testing instruments. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CMZDRQ66 | | Best Sellers Rank | #256 in Telescope Eyepieces | | Brand | CAUME | | Camera Lens | The CAUME TianWen11WYJ03 is a prime camera lens with a fixed focal length of 70mm and a maximum aperture of F7.1. It features optical image stabilization and is designed with a 72mm diameter and a focus distance of 500mm. The lens is constructed with apochromatic double-separation optical structure, ensuring high imaging sharpness and consistent performance. It is suitable for various applications… | | Camera Lens Description | The CAUME TianWen11WYJ03 is a prime camera lens with a fixed focal length of 70mm and a maximum aperture of F7.1. It features optical image stabilization and is designed with a 72mm diameter and a focus distance of 500mm. The lens is constructed with apochromatic double-separation optical structure, ensuring high imaging sharpness and consistent performance. It is suitable for various applications such as telescope objective lenses and parallel light pipeline production testing instruments. Camera Lens Description The CAUME TianWen11WYJ03 is a prime camera lens with a fixed focal length of 70mm and a maximum aperture of F7.1. It features optical image stabilization and is designed with a 72mm diameter and a focus distance of 500mm. The lens is constructed with apochromatic double-separation optical structure, ensuring high imaging sharpness and consistent performance. It is suitable for various applications such as telescope objective lenses and parallel light pipeline production testing instruments. See more | | Compatible Camera Mount | Canon EF, Nikon F | | Compatible Mountings | Canon EF, Nikon F | | Focal Length Description | 70 mm | | Focus Type | Fixed Focus | | Image stabilization | Optical | | Lens | Telephoto | | Lens Design | Prime | | Lens Type | Telephoto | | Manufacturer | CAUME | | Manufacturer Part Number | TianWen11WYJ03 | | Maximum Aperture | 7.1 f_stop | | Maximum Focal Length | 7 centimeters | | Minimum Focal Length | 7 centimeters | | Model Name | TianWen11WYJ03 | | Number of Items | 1 | | Photo Filter Size | 7.2 centimeters | | Screen Size | 7 centimeters | | UPC | 764015311444 | | Zoom Ratio | 1:1 | ## Product Details - **Brand:** CAUME - **Compatible Mountings:** Canon EF, Nikon F - **Focal Length Description:** 70 mm - **Lens Type:** Telephoto ## Images ![Optical Glass Objective Lens Concave&Convex Lens for DIY Astronomical Telescope 70mm - Image 1](https://m.media-amazon.com/images/I/51PswirEGLL.jpg) ![Optical Glass Objective Lens Concave&Convex Lens for DIY Astronomical Telescope 70mm - Image 2](https://m.media-amazon.com/images/I/51lxPd4KCUL.jpg) ![Optical Glass Objective Lens Concave&Convex Lens for DIY Astronomical Telescope 70mm - Image 3](https://m.media-amazon.com/images/I/51HK5xSC-7L.jpg) ## Available Options This product comes in different **Size** options. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/661489524-optical-glass-objective-lens-concave-and-convex-lens-for-diy](https://www.desertcart.com.ar/products/661489524-optical-glass-objective-lens-concave-and-convex-lens-for-diy) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-10-25*