Pentax

Pentax SMC-A 28mm f2.8 Prime Lens K-Mount

Name: Pentax SMC-A 28mm f2.8 Prime Lens K-Mount
Brand: Pentax
SKU: SMC-A 28mm f2.8

Capture Stunning Wide-Angle Shots with Pentax SMC-A 28mm f2.8 LensThe Pentax SMC-A 28mm f2.8 prime lens is perfect for photographers seeking high-quality wide-angle images. This lens offers excellent clarity and sharpness. Mount Type: K-mount Focal Length: 28mm Aperture: f/2.8 Condition: Cle...

$189.99*

✓ In Stock on Amazon.com

View on Amazon

*Price sourced from Amazon.com. Last updated:Aug 28, 2026.Price and availability are subject to change — details.

Affiliate Disclosure: As an Amazon Associate, Studio Supplies earns from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

Capture Stunning Wide-Angle Shots with Pentax SMC-A 28mm f2.8 Lens

The Pentax SMC-A 28mm f2.8 prime lens is perfect for photographers seeking high-quality wide-angle images. This lens offers excellent clarity and sharpness.

Mount Type: K-mount
Focal Length: 28mm
Aperture: f/2.8
Condition: Cleaned and Tested
Includes: Lens cap, back cap, and UV/Gaze filter

Key Features

Wide-angle 28mm (45mm for DSLRs w/APS sensors)

Specifications

Lens Type

Prime Lens

Focal Length

28mm

Maximum Aperture

f/2.8

Mount Type

K-Mount

Equivalent Focal Length (APS-C)

45mm

Frequently Asked Questions

What is the focal length of the Pentax SMC-A 28mm f2.8 Prime Lens?

The focal length of this Pentax lens is 28mm, providing a wide-angle perspective.

What is the maximum aperture of this lens?

The maximum aperture of the Pentax SMC-A 28mm f2.8 Prime Lens is f/2.8.

What camera mount is this lens designed for?

This lens is designed for the K-Mount, making it compatible with Pentax K-mount cameras.

What is the equivalent focal length when used on a DSLR with an APS-C sensor?

When used on a DSLR with an APS-C sensor, the equivalent focal length of this 28mm lens is approximately 45mm.

Is this a zoom lens or a prime lens?

The Pentax SMC-A 28mm f2.8 is a prime lens, meaning it has a fixed focal length of 28mm.

Strengths & Trade-offs

👍 Pros

Offers a 28mm wide-angle focal length, suitable for capturing expansive landscapes and architectural shots.
The f/2.8 maximum aperture allows for good low-light performance and creative shallow depth-of-field effects.
As a prime lens, it typically delivers sharper images and better optical quality compared to zoom lenses.
The K-Mount ensures compatibility with a range of Pentax cameras, including many film and digital SLR bodies.
When used on APS-C sensor DSLRs, it provides an equivalent focal length of 45mm, approaching a "nifty fifty" perspective.

👎 Cons

Being a prime lens, it lacks the versatility of a zoom lens, requiring the photographer to physically move to change composition.
The f/2.8 aperture, while good, may not be as wide as some specialized prime lenses available for extremely low-light scenarios.
The manual focus design might be challenging for users accustomed to modern autofocus systems, especially for fast-moving subjects.
Compatibility is limited to K-Mount systems, meaning it cannot be used natively on other camera brands.
As an older SMC-A series lens, it may not offer modern lens coatings or advanced autofocus motors found in newer lenses.