Carsen 135mm f/3.5

of photo lenses, with a maximum aperture of f/3.5. It produces a smooth and creamy bokeh effect with its 9 aperture blades. The autofocus feature is not available, so it has to be focused manually. The lens elements are made up of high-quality glass, which is coated to minimize flare and ghosting. The manufacturing time is not disclosed, but it is made with precision and care. The build quality is sturdy and durable, with a metal body that can withstand wear and tear. The resolution is sharp and detailed, making it ideal for portrait and landscape photography. Overall, the Carsen 135mm f/3.5 is a reliable and affordable option for photographers who prefer manual focus lenses. There are alternatives available in the market, but this lens offers good value for money.

Optical design

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