SMC Pentax-M 135mm f3.5 Lens for Pen K Mount

Lens is in great condition, shows some minor wear along the aperture ring, with some minor denting along the built in lens hood, none of which affect functionality. Glass is in great condition, some minor specks in the rear element that don't affect image quality, front element is clean and really shines.  

The Pentax-M 135mm lens, like many vintage lenses, has garnered a reputation for being "good" for certain photographic purposes. While the lens has its own unique characteristics and strengths, its goodness is often subjective and context-dependent. Here are some reasons why the Pentax-M 135mm lens is often appreciated:

1. Build Quality: The Pentax-M series lenses were known for their solid construction. The lens is typically built with metal components, which contribute to its durability and longevity. Many photographers appreciate the tactile feel and quality of these older lenses.

2. Affordability: The Pentax-M 135mm lens is often available on the used market at a reasonable price. This makes it an accessible option for photographers looking to experiment with telephoto photography without breaking the bank.

3. Compact and Lightweight: Compared to some modern telephoto lenses, the Pentax-M 135mm lens is relatively compact and lightweight. This can be advantageous for portability and ease of use, particularly for outdoor and travel photography.

4. Good Optical Performance: While not the most technically advanced lens, the Pentax-M 135mm is capable of delivering good optical performance in certain conditions. It can produce sharp images with decent contrast when used within its limitations.

5. Smooth Manual Focus: The lens typically features a smooth and well-damped manual focus ring, which can be appreciated by photographers who prefer manual focus control. It allows for precise adjustments when focusing.

6. Bokeh Quality: The Pentax-M 135mm lens can produce pleasing background blur (bokeh) thanks to its longer focal length and wide maximum aperture (typically around f/3.5 to f/3.8). This can help isolate subjects and create a sense of depth in portraits or close-up shots.

7. Vintage Aesthetic: Some photographers are drawn to the unique rendering style and aesthetic characteristics of vintage lenses like the Pentax-M 135mm. These lenses can impart a certain nostalgic or vintage look to images.

8. Adaptability: With the right adapter, the Pentax-M 135mm lens can be used on a variety of camera bodies, including mirrorless cameras from different manufacturers. This adaptability allows photographers to use the lens on modern camera systems.