What is a T2 lens mount

The T2 lens mount, also known as T-mount or T-thread, is a standard for connecting camera lenses to cameras or other optical devices. It was developed by the company Tamron but has since been adopted as a universal mount for a wide range of cameras and optical equipment. Here are some key characteristics and information about the T2 lens mount:

1. Thread Size: The T2 mount has a standardized thread size of 42mm x 0.75mm. This means it has a 42mm diameter with a thread pitch of 0.75mm. The fine thread pitch is useful for securely attaching and aligning lenses and other optical accessories.
2. Versatility: T2 mounts are known for their versatility. They can be adapted to fit various camera systems by using T2-to-camera-specific adapters. This makes it possible to use lenses with T2 mounts on different camera brands and models.
3. Manual Focus: T2-mount lenses are typically manual focus lenses. They don’t have autofocus capabilities, so you need to adjust the focus manually.
4. Common Uses: T2-mount lenses are often used in astrophotography and other specialized photography applications. They are also used with telescopes and microscopes, allowing photographers and astronomers to connect cameras to these optical devices.
5. T-Rings: To connect a T2-mount lens to a camera, you’ll need a T-ring specific to your camera brand and model. These T-rings have a T2 thread on one side and a camera-specific mount (e.g., Canon EF, Nikon F, Sony E) on the other side. The T-ring attaches to the camera body, while the T2-mount lens screws onto the T-ring.
6. Extension Tubes and Accessories: T2 mounts are also used for extension tubes and other optical accessories. Extension tubes, for example, can be used to increase the distance between the camera sensor and the lens, allowing for closer focusing and macro photography.
7. Compatibility: Since the T2 mount is a universal standard, you can find T2-mount adapters and accessories for a wide range of camera brands, including Canon, Nikon, Sony, and more.

In summary, the T2 lens mount is a versatile and widely used standard for connecting lenses and optical accessories to cameras. It is particularly popular in specialized photography fields like astrophotography and is adaptable to various camera systems through the use of T-rings and adapters. Keep in mind that while T2-mount lenses offer flexibility, they are typically manual focus lenses, so users must manually adjust the focus when using them.