Asobinet found a patent for a Tamron 100mm f/2.8 Di III 1: 1 Macro mirrorless lens that should come to E-Mount
Overview
- [Publication Number] Japanese Patent Application Laid-Open No. 2022-14947 (P2022-14947A)
- [Publication date] January 21, 2022.1 (2022.1.21)
- Description: Optical system and image pickup apparatus
- [Application date] July 8, 2nd year of Reiwa (2020.7.8)
- [Applicant]
[Identification number] 000133227
[Name or name] Tamron Co. , Ltd. - PROBLEM TO BE SOLVED: To provide a compact optical system and an image pickup apparatus while having high optical performance from infinity to close proximity.
- In
recent years, a small image pickup device using a solid-state image pickup element such as a digital still camera has become widespread. Along with this, there is a high demand for a compact imaging system, and there is a demand for miniaturization of the mounted optical system. In addition, there is a high demand for higher performance, and in an optical system capable of close-up photography with a high shooting magnification, high optical performance is required from infinity to close-up. Therefore, a so-called floating method has been adopted in which aberration fluctuations are suppressed by moving a plurality of lens groups during focusing. However, in an optical system that employs a floating method, reducing the stroke amount of each focus lens group required for focusing greatly contributes to the miniaturization of the optical system and, by extension, the lens barrel. The issue is whether it can be suppressed. - Therefore, an object of the present invention
is to provide a compact optical system while having high optical performance from infinity to close range.
Example 1
- Focal length: 102.2339-39.8108
- F value: 2.8880-5.7689
- Half angle of view: 11.82020-5.8028
- Shooting magnification: 0.0 — 1.0
via asobinet
