Repairing Focus ring on Sigma 70-300mm F4-5.6 DG Macro for Sony
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Background and Identification
This is a great quality, compact camera lens. It is all black and labeled with white lettering around the lens. There is a red ring around the end of the lens and a gold Sigma logo in the middle. There are grooves toward the bottom of the lens for adjusting the zoom, as well as a switch for adjusting zoom settings. The lens cap is removable. There are also bottom screws accessible by removing the contact plate that allow you to open up your device for repair.
Inside of the lens there are a few more layers of removable screws, allowing you to go all the way into the internal components and fix your issue.
The lens glass is called “Special Low Dispersion” glass. It’s multi-layered and designed to correct light flare and reduce the ghost effect commonly seen in digital photos.
This lens has been discontinued by the manufacturer.
Technical Specifications
- Minimum Aperture:F22
- Maximum Magnification Ratio: 1:4.1（Macro mode 1:2）
- Weight: 545g
- Length: 4.8 inches
- Dimensions: 3 x 4.8 inches
- Number of Diaphragm Blades: 9
- Minimum Focusing Distance: 59 in
- Manufacturer: Sigma
