大井光機 List of Products and Services

At Oi Koki, we conduct lens design as well as metal frame and mechanism design. We also handle lens manufacturing, assembly, and adjustment within a clean booth, and we have experience in polishing lenses with a diameter of Φ420 and assembling metal frames. Please feel free to consult us when you need our services. *For more details, please refer to the related links or feel free to contact us.

• lens
• lens
• Contract manufacturing

We would like to introduce the 'Masuyama 32mm 85°' handled by Oi Koki. It features a 3-group, 5-element design that does not use a barlow lens. With fewer lens elements, it has a full multi-coating on the air surfaces, resulting in excellent light transmission. Additionally, if you remove the rubber eyepiece and the eyepiece ring, you will find a thread cut for "M45 pitch 0.5." If you prepare a connection ring, you can connect it to a camera and take photographs. 【Features】 ■ 3-group, 5-element design without a barlow lens ■ Fewer lens elements ■ Full multi-coating on air surfaces for excellent light transmission ■ Especially recommended for binocular users ■ If you prepare a connection ring, you can connect it to a camera and take photographs *For more details, please refer to the related links or feel free to contact us.

• lens
• lens

We would like to introduce the 'Masuyama 26mm 85°' handled by Oi Koki. It features a 5-element, 3-group design without using a barlow lens. With fewer lens elements, it has a fully multi-coated air surface, providing excellent light transmission. It is particularly recommended for binocular users, with a barrel diameter of 58mm and equipped with a rubber eyepiece. 【Features】 ■ 5-element, 3-group design without using a barlow lens ■ Fewer lens elements ■ Particularly recommended for binocular users ■ Barrel diameter of 58mm, equipped with a rubber eyepiece *For more details, please refer to the related links or feel free to contact us.

• lens
• lens

We would like to introduce the 'Masuyama 20mm 85°' handled by Oi Koki. It features a 3-group, 5-element design without using a barlow lens. With fewer lens elements, it has a full multi-coating on the air surfaces, resulting in excellent light transmission. It is particularly recommended for binocular users, with a barrel diameter of 58mm, and it also comes with a rubber eyepiece. 【Features】 ■ 3-group, 5-element design without using a barlow lens ■ Fewer lens elements ■ Full multi-coating on the air surfaces for excellent light transmission ■ Barrel diameter of 58mm, with a rubber eyepiece included *For more details, please refer to the related links or feel free to contact us.

• lens
• lens

We would like to introduce the 'Masuyama 10mm 85°' handled by Oi Koki. It features a 3-group, 5-element design without using a barlow lens. With fewer lens elements, it has a fully multi-coated air surface, resulting in excellent light transmission. Additionally, the sleeve diameter is in American size, measuring 1.25 inches (Φ31.75). 【Features】 ■ 3-group, 5-element design without using a barlow lens ■ Fewer lens elements ■ Sleeve diameter is in American size, 1.25 inches (Φ31.75) ■ Includes rubber eyepiece and rubber belt *For more details, please refer to the related links or feel free to contact us.

• lens
• lens

The "Masuyama 16mm 85°" features a 3-group, 5-element design that does not use a barlow lens, resulting in a small number of lens elements. It is characterized by its excellent light transmission due to full multi-coating on the air surfaces. The sleeve diameter is 12.5 inches (Φ31.75), which is an American size. It comes with a rubber eyepiece and a rubber belt. 【Features】 ■ 3-group, 5-element design without a barlow lens ■ Fewer lens elements ■ Full multi-coating on air surfaces ■ Excellent light transmission *For more details, please download the PDF or feel free to contact us.

• lens
• lens