Andoer 50 mm F1.7 Wide Aperture Manual Focus Camera Lens Prime Lens PK Mount Replacement for Pentax K1 / K-1 Mark II Full Frame Cameras
5.0Editor score
Wide aperture design
Manual focus operation
Full frame compatible
In this guide
Finding the right optics for your camera is essential for capturing sharp, vibrant images. K Mount Lenses for Pentax Camera offer a wide variety of focal lengths and apertures to suit any style of photography.
We have analyzed ten top-rated options ranging from vintage primes to modern zooms. Each product was evaluated based on optical quality, build durability, and compatibility with current Pentax digital bodies.
Every pick below highlights unique strengths and ideal use cases for different photographers. Please note that availability and terms may change, so verify details before purchasing your next lens.
Top 3 Picks for Best K Mount Lenses for Pentax Camera
Pentax SMC PENTAL-Da 35mmF2.4AL Standard Lens Focal Length 53.5mm (Equivalent to 35mm Format) High Delineation Performance F2.4 High Brighness Compact Lightweight Design Aspherical Lens Super Protect Coating, Black (21987)
4.6Editor score
Compact lightweight design
Super protect coating
Hybrid aspherical lenses
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR Lens for Pentax Digital SLR cameras,Black
4.5Editor score
Weather resistant construction
DC motor autofocus
Extended zoom range
Top 10 Best K Mount Lenses for Pentax Camera in 2026 Compared
This side-by-side comparison highlights key specifications for all ten lenses to help you make an informed decision quickly. Look closely at the mount type, focal length, and special features before buying.
ProductsSpecificationsEditor scorePrice
Best Budget
Andoer 50 mm F1.7
PK Mount replacement
50mm focal length
Manual focus only
Full frame support
5.0Editor score
Editor's Choice
Pentax SMC PENTAL-Da 35mmF2.4AL
Pentax K Mount
35mm focal length
Aspherical element
Super Protect coating
4.6Editor score
Best Premium
Tamron AF 70-300mm f/4.0-5.6 Di LD Macro
70-300mm zoom
Macro capability
AF motor
Digital SLR support
Pentax SMC 50mm F1.7 Manual Focus MF Lens
Renewed condition
50mm focal length
Manual focus ring
K Mount support
3.0Editor score
Sigma 28-80mm F3.5-5.6 Aspherical Macro HF
28-80mm zoom
Aspherical lens
Pentax-AF mount
Macro function
Pentax Asahi SMC M 1:2 2 50mm 50 mm
Vintage lens
PK Bajonett mount
50mm focal length
Used condition
5.0Editor score
Pentax SMC 50mm F/2.0 Lens Prime Portrait
Renewed condition
50mm focal length
F/2.0 aperture
K Mount support
SMC Pentax-M 50mm F1.7 manual focus lens
SMC coating
50mm focal length
Manual focus only
Classic design
4.2Editor score
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR
Weather resistant
18-135mm zoom
DC motor
Super Protect coating
4.5Editor score
K&F CONCEPT Rear Lens Cap & Body Cap Cover & Hot Shoe Cover Kit
Includes rear lens cap
Body cover kit
Hot shoe protector
Microfiber cloth
4.7Editor score
1. Andoer 50 mm F1.7 – Best Budget
Andoer 50 mm F1.7
50mm focal length
F1.7 aperture
PK Mount mount
Manual focus ring
The Andoer 50 mm F1.7 is a highly rated manual lens that offers great value for Pentax users. It provides a bright aperture and full frame compatibility at a very accessible entry price.
Pros
- Affordable price point
- Large aperture
- Full frame support
- Manual precision
- Lightweight body
Cons
- Manual focus only
- Basic build
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Its F1.7 aperture allows for excellent low light performance and creative background blur. The manual focus ring is smooth and precise, giving you full control over your focus point.
Trade-offs include the lack of autofocus and a simpler build compared to premium options. However, for those willing to focus manually, this lens delivers impressive clarity.
Budget photographers and hobbyists should consider this lens for portraits and street shots. It is an excellent way to explore manual focusing without a large financial commitment.
Bright Aperture Benefits
The wide aperture allows more light into the sensor, enabling faster shutter speeds in dim environments.
Manual Control
Manual focus rings allow for deliberate adjustments that autofocus systems often miss in complex scenes.
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2. Pentax SMC PENTAL-Da 35mmF2.4AL – Editor's Choice
Pentax SMC PENTAL-Da 35mmF2.4AL
35mm focal length
F2.4 aperture
Aspherical lens
Super Protect coating
This Pentax SMC PENTAL-Da 35mmF2.4AL lens is widely praised for its compact design and high delineation performance. It serves as an excellent standard lens for everyday shooting.
Pros
- Compact size
- High contrast
- Lightweight
- Durable coating
- Ideal first lens
Cons
- Lower max aperture
- Manual SR
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The hybrid aspherical lenses correct aberrations effectively, ensuring sharp images from edge to edge. The Super Protect coating keeps the front element clean against dust and water.
While the F2.4 aperture is modest, the lightweight design makes it easy to carry for long periods. In camera shake reduction helps mitigate the slower max aperture in low light.
This lens is ideal for photographers seeking a portable, high quality option for snapshots and landscapes. It offers a reliable balance of performance and convenience for any kit.
Optical Precision
Hybrid aspherical elements minimize distortion and ensure crisp details across the entire frame.
Weather Protection
The Super Protect coating repels moisture and dirt, making cleaning simple and protecting the optics.
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3. Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR – Best Premium
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR
18-135mm zoom
Weather resistant
DC motor
Super Protect coating
The Pentax 21977 DA 18-135mm is a top tier zoom that covers wide to telephoto needs in a single package. Its weather resistance and quality optics make it a premium choice.
Pros
- Versatile zoom range
- Weather resistant
- Quiet AF
- Compact for zoom
- High build quality
Cons
- Price point
- Variable aperture
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Direct Current motor ensures quiet autofocus operation, while the weather resistant construction handles damp conditions effectively. The extended zoom range reduces the need to swap lenses often.
A variable aperture is standard for this class, but the build quality and protection features justify the cost. It is robust enough for outdoor shoots and travel photography.
Serious photographers needing one lens for varied scenes will appreciate this model. It provides professional grade durability and versatility without excessive bulk or weight.
Weather Resilience
Sealed construction protects internal components from moisture, dust, and debris during outdoor shoots.
Zoom Flexibility
A broad focal range allows you to capture both expansive landscapes and distant subjects easily.
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4. Pentax SMC 50mm F1.7 Manual Focus MF Lens – Classic Prime
Pentax SMC 50mm F1.7 Manual Focus MF Lens
50mm focal length
F1.7 aperture
Manual focus
Renewed option
This Pentax SMC 50mm F1.7 Manual Focus MF Lens is a renewed option that offers a reliable classic focal length. It is designed for those seeking traditional manual focus experiences.
Pros
- Affordable renewed
- Classic optics
- Manual control
- Good depth of field
Cons
- Used condition risk
- Lower rating
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Renewed products provide access to high quality optics at reduced costs. The 50mm focal length is a standard perspective ideal for portraits and general photography.
Buying renewed carries inherent risks regarding wear or previous handling. It is wise to inspect the lens upon arrival to ensure it meets your quality standards.
Those who appreciate vintage style optics and manual focus will find this lens satisfying. It remains a popular choice for its straightforward design and affordable price.
Renewed Value
Choosing a renewed item can save money while still providing access to high performance optics.
Standard Focal Length
The 50mm focal length matches human vision closely, making it versatile for many subjects.
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5. Sigma 28-80mm F3.5-5.6 Aspherical Macro HF – Macro Capability
Sigma 28-80mm F3.5-5.6 Aspherical Macro HF
28-80mm zoom
Aspherical lens
Macro function
Pentax-AF mount
The Sigma 28-80mm F3.5-5.6 Aspherical Macro HF Lens offers a versatile zoom range with macro capabilities. It is a practical choice for general purpose photography on Pentax bodies.
Pros
- Macro capability
- Aspherical elements
- Versatile zoom
- Compact design
Cons
- Older model
- Slow aperture
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Aspherical elements help reduce aberrations for sharper images across the frame. The macro feature allows for close up shots of small subjects without extra accessories.
This lens is an older model, so autofocus speed and coating technology may lag behind modern standards. However, it remains a solid option for casual photographers.
Photographers looking for an all-in-one zoom with close focusing abilities will find value here. It is a good fit for those starting out or needing a walkabout lens.
Macro Functionality
Built-in macro features enable close focusing for detailed shots of small objects or textures.
Aspherical Optics
Aspherical lens elements help correct distortions and improve overall sharpness in images.
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6. Pentax Asahi SMC M 1:2 2 50mm 50 mm – Vintage Quality
Pentax Asahi SMC M 1:2 2 50mm 50 mm
Vintage lens
PK Bajonett mount
50mm focal length
Used condition
The Pentax Asahi SMC M 1:2 2 50mm 50 mm is a vintage lens known for its classic build and reliable optics. It is a great choice for purists who enjoy mechanical lenses.
Pros
- Classic build
- 50mm prime
- High rating
- Solid metal
Cons
- Manual focus
- Used risk
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Users rate this lens highly for its solid construction and straightforward design. The PK Bajonett mount ensures compatibility with Pentax SLR cameras without adapters.
Using a vintage lens requires manual focusing and awareness of potential wear. However, the tactile experience and unique rendering often justify these trade-offs for enthusiasts.
Collectors and photographers who value mechanical feel will love this lens. It brings a touch of history to your kit while delivering sharp images in good condition.
Vintage Charm
Vintage lenses offer unique optical character and a tactile shooting experience modern lenses often lack.
Solid Construction
Metal bodies and high quality glass ensure durability and longevity when used with care.
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7. Pentax SMC 50mm F/2.0 Lens Prime Portrait – Portrait Specialist
Pentax SMC 50mm F/2.0 Lens Prime Portrait
50mm focal length
F/2.0 aperture
Prime lens
Renewed condition
This Pentax SMC 50mm F/2.0 Lens Prime Portrait is a renewed option designed to capture stunning detail and vibrant colors. It is ideal for portraits and street photography.
Pros
- Portrait focus
- Bright aperture
- Compact design
- Optical clarity
Cons
- Renewed risk
- Manual focus
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The F/2.0 aperture allows for shallow depth of field and beautiful bokeh effects. Manual focus precision gives you full control over your subject's critical focus point.
Renewed items may have minor cosmetic signs of use but function well. Check the condition description carefully to ensure it matches your expectations.
Portrait photographers and street shooters will appreciate the fixed focal length and bright aperture. It remains a compact and versatile choice for many creative applications.
Shallow Depth of Field
Wide aperture allows for strong background separation, making subjects stand out clearly.
Optical Excellence
High quality optics ensure crystal clear images with accurate colors and sharp details.
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8. SMC Pentax-M 50mm F1.7 manual focus lens – Manual Standard
SMC Pentax-M 50mm F1.7 manual focus lens
50mm focal length
F1.7 aperture
SMC coating
Manual focus
The SMC Pentax-M 50mm F1.7 manual focus lens is a classic choice for Pentax photographers seeking high performance manual glass. It features SMC coating for enhanced contrast and color.
Pros
- Multi-coated
- Bright aperture
- Lightweight
- Durable
Cons
- No AF
- Manual ring
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Its F1.7 aperture provides excellent low light capability and a creamy out of focus area. The compact and lightweight design makes it easy to carry for extended periods.
As a manual focus lens, it requires patience and practice to use effectively. However, this allows for deliberate composition and focus accuracy that autofocus may miss.
Those who enjoy the tactile experience of manual photography will find this lens rewarding. It is a reliable workhorse for portraits and general shooting needs.
Multi-Coated Glass
Super Multi Coating reduces flare and ghosting while improving color accuracy in images.
Fast Manual Focus
Smooth manual focus rings allow for precise adjustments that suit creative control.
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9. Andoer 50 mm F1.7 – Full Frame Prime
Andoer 50 mm F1.7
PK Mount replacement
50mm focal length
Full frame
F1.7 aperture
The Andoer 50 mm F1.7 Wide Aperture Manual Focus Camera Lens is a full frame compatible prime for Pentax K1 and K-1 Mark II cameras. It offers a large aperture for creative depth.
Pros
- Full frame cover
- Bright aperture
- Low cost
- Prime sharpness
Cons
- Manual focus
- Simple build
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Its PK mount replacement allows compatibility with full frame bodies without vignetting. The large aperture helps in low light and provides strong subject separation in images.
Manual focus operation is standard for this lens, requiring user input to achieve critical sharpness. This can be a benefit for photographers who prefer total control.
Users seeking a full frame prime without breaking the bank will find this lens useful. It delivers excellent value and optical performance for its intended camera systems.
Full Frame Support
Designed specifically to cover the larger sensor area of full frame Pentax bodies.
Large Aperture
A wide aperture allows more light to hit the sensor, enabling faster shutter speeds.
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10. K&F CONCEPT Rear Lens Cap & Body Cap Cover & Hot Shoe Cover Kit – Lens Kit
K&F CONCEPT Rear Lens Cap & Body Cap Cover & Hot Shoe Cover Kit
Rear lens cap
Body cover
Hot shoe cover
Microfiber cloth
This K&F CONCEPT Rear Lens Cap & Body Cap Cover & Hot Shoe Cover Kit is a useful accessory set for Pentax K Mount owners. It includes covers and a cleaning cloth for your gear.
Pros
- Complete protection
- Compatible kit
- Easy install
- Durable material
Cons
- Not a lens
- Accessory only
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The camera body cover and rear lens cap provide physical protection from dust and drops. Compatibility with models like K3 and K70 ensures a snug fit.
While not a lens, this kit helps protect your optics when they are not in use. The hot shoe cover protects the interface from moisture and debris accumulation.
Photographers looking to keep their gear safe and clean should consider this kit. It offers quick install and high impact protection for your valuable equipment.
Physical Protection
Durable caps prevent dust and debris from entering the camera body or sensor.
Compatibility
Designed to fit Pentax K Mount cameras and lenses securely to prevent accidental entry.
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Buying Guide – How to Choose the Best K Mount Lenses for Pentax Camera
Choosing the right lens requires understanding your shooting needs and camera compatibility. This guide outlines key factors to consider before buying.
Mount Compatibility
Ensure the lens is designed for the Pentax K Mount to fit your camera properly. Some lenses may be marked as PK Mount or DA K and work well.
Always check the mount type in the product specs before purchasing to avoid incompatibility.
Focal Length
Decide if you need a prime or zoom lens. Primes like 50mm offer sharpness while zooms like 18-135mm provide versatility.
Select a focal length that matches your typical subjects such as portraits or landscapes.
Aperture Size
Larger apertures like F1.7 allow more light and better background blur. Smaller apertures like F2.4 are sufficient for daylight shooting.
Consider how you will shoot in low light before selecting an aperture size.
Autofocus vs Manual
Autofocus lenses offer speed and convenience for action or casual shots. Manual focus lenses provide precise control and a classic shooting feel.
Choose based on your comfort with focusing and the type of photography you enjoy.
Build Quality
Look for lenses with weather sealing if you shoot outdoors. Metal mounts often provide better durability than plastic ones.
Invest in lenses that can withstand your typical shooting conditions and travel needs.
Condition
New lenses offer warranties and pristine optics but cost more. Renewed or used lenses can save money but require careful inspection.
Check seller ratings and condition descriptions to ensure you get a reliable product.
Special Features
Some lenses have special coatings or macro capabilities. These features can add value if you need specific performance like water resistance.
Prioritize features that directly improve your photos rather than just adding cost.
Budget
Set a realistic budget before browsing. There are affordable options like the Andoer 50mm and premium options like the Pentax 18-135mm.
Focus on value and quality over brand names to get the best results.
How to Use and Care for Your K Mount Lenses for Pentax Camera
To attach a lens, align the red or white dot on the lens with the marker on the camera body. Turn the lens clockwise until it clicks securely into place.
For manual focus lenses, rotate the focus ring slowly while looking through the viewfinder. Use the focus assist feature if available to confirm sharpness.
Keep lenses clean by wiping the front glass with a microfiber cloth. Store caps on when not in use to protect the optics from dust and scratches.
Frequently Asked Questions
Are all K Mount lenses compatible with all Pentax cameras?
Most K Mount lenses work with Pentax DSLRs but older lenses may lack autofocus. Always check your camera manual for specific compatibility details before buying.
What is the difference between DA and K mount lenses?
DA lenses are optimized for digital sensors while K lenses are older film designs. Both generally fit modern Pentax bodies but may behave differently.
Can I use manual focus lenses with Pentax digital cameras?
Yes you can use manual focus lenses on Pentax digital bodies. Some cameras offer focus assistance to help you achieve sharp focus manually.
Do Pentax lenses have weather sealing?
Many newer Pentax lenses feature weather resistant construction. Look for WR markings on the lens to confirm if it is sealed against moisture.
What is the best prime lens for portraits?
A 50mm F1.7 prime is often considered ideal for portraits. It offers a natural perspective and shallow depth of field for subject separation.
Are renewed lenses worth buying?
Renewed lenses can offer excellent value if inspected properly. Check the condition report and return policy before making your purchase decision.
How do I clean a Pentax lens safely?
Use a soft brush to remove dust and a microfiber cloth with lens cleaner. Avoid harsh chemicals that could damage the coating on the glass.
What focal length is best for landscapes?
Wide angle zooms like 18-135mm are great for landscapes. They capture expansive scenes and offer flexibility for different compositions.
Final Thoughts on Choosing the Best K Mount Lenses for Pentax Camera
The Andoer 50mm Pentax SMC PENTAL-Da 35mm and Pentax 18-135mm are top picks for different needs. Each offers unique strengths ranging from budget value to premium durability.
Prioritize factors like aperture size and weather resistance based on your specific shooting style. The right lens will enhance your camera's performance significantly.
Remember that prices and availability change frequently. Check current listings and reviews to ensure you are getting the best deal for your needs.