Andoer 50 mm F1.7 Wide Aperture Manual Focus Camera Lens
5.0Editor score
Large aperture prime lens
Manual focus operation
PK Mount replacement
In this guide
Choosing the right lens is crucial for unlocking the full potential of your Pentax camera system. Whether you shoot portraits, landscapes, or wildlife, having compatible K Mount glass ensures optimal performance and image quality across your gear.
We have evaluated ten top rated lenses based on optical quality, build durability, and user feedback. This list covers a wide range of focal lengths and styles to suit photographers at every level of experience and budget.
Each pick highlights key strengths and ideal use cases so you can make an informed decision quickly. Keep in mind that availability and pricing may vary over time so always check current listings before purchasing your next lens.
Top 3 Picks for Best K Mount Lenses for Pentax Camera
Pentax SMC PENTAL-Da 35mmF2.4AL Standard Lens
4.6Editor score
Compact lightweight design
Super protect coating
High delineation performance
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR Lens
4.5Editor score
Weather resistant design
75x zoom range
Quick quiet autofocus
Top 10 Best K Mount Lenses for Pentax Camera in 2026 Compared
The following table offers a side by side comparison of all ten lenses featured in this guide. Use this overview to quickly identify key specifications and features that match your specific photography requirements.
ProductsSpecificationsEditor scorePrice
Best Budget
Andoer 50 mm F1.7
50mm focal length
F1.7 aperture
Manual focus only
PK Mount compatible
5.0Editor score
Editor's Choice
Pentax SMC PENTAL-Da 35mmF2.4AL
35mm focal length
F2.4 aperture
Aspherical lens element
Compact lightweight build
4.6Editor score
Best Premium
Tamron AF 70-300mm f/4.0-5.6
70-300mm zoom
Macro capability
LD lens elements
Pentax Digital SLR
Pentax SMC 50mm F1.7 Manual Focus
50mm focal length
F1.7 aperture
Manual focus ring
Renewed condition
3.0Editor score
Sigma 28-80mm F3.5-5.6
28-80mm zoom
Aspherical elements
Macro features
Pentax-AF mount
Pentax Asahi SMC M 1:2.8 50mm
50mm focal length
F2.8 aperture
Manual focus
PK Bajonett mount
5.0Editor score
Pentax SMC 50mm F/2.0
50mm focal length
F2.0 aperture
Manual focus ring
Renewed condition
SMC Pentax-M 50mm F1.7
50mm focal length
F1.7 aperture
Manual focus lens
SMC coating
4.2Editor score
Pentax 21977 DA 18-135mm
18-135mm zoom
Weather resistant
DC motor AF
SP coating
4.5Editor score
K&F CONCEPT Rear Lens Cap Kit
Lens and body caps
Hot shoe cover
Pentax K Mount
Microfiber cloth
4.7Editor score
1. Pentax SMC PENTAL-Da 35mmF2.4AL – Best Overall K Mount Lens
Pentax SMC PENTAL-Da 35mmF2.4AL Standard Lens
35mm equivalent focal length
F2.4 maximum aperture
Hybrid aspherical lens
Super protect coating
This lens stands out as a top recommendation for Pentax shooters seeking a versatile standard prime. It holds a strong rating among users who value portability and image clarity in equal measure.
Pros
- Extremely lightweight design
- Sharp edge to edge
- Built in coating protection
- Ideal first lens choice
- Great low light performance
Cons
- Manual focus only
- Short minimum focus distance
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The hybrid aspherical design ensures high delineation performance across the frame. Its F2.4 aperture allows for bright visibility and shallow depth of field effects that enhance portrait and street photography significantly.
While it lacks autofocus, the manual ring is smooth and precise for controlled shooting. The compact size makes it easy to carry daily without adding bulk to your camera bag.
Photographers looking for a lightweight everyday lens should consider this option. It delivers excellent value and performance for those who prioritize quality optics over automatic features.
Optical Clarity and Sharpness
The hybrid aspherical elements correct aberrations effectively ensuring crisp images from minimum to maximum focusing distances.
Durable Protective Coating
Super Protect coating repels dust water and grease making maintenance easier and protecting the front element from environmental damage.
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2. Andoer 50 mm F1.7 – Best Budget K Mount Lens
Andoer 50 mm F1.7 Wide Aperture Manual Focus Camera Lens
50mm prime focal length
F1.7 wide aperture
Manual focus mechanism
PK Mount replacement
This prime lens offers an accessible entry point for Pentax users wanting a fast 50mm optic. It has received excellent feedback for its value and performance relative to cost.
Pros
- Very affordable price
- Bright F1.7 aperture
- Full frame compatible
- Simple manual operation
- High user satisfaction
Cons
- Build feels basic
- Focus ring can be stiff
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The wide F1.7 aperture allows for stunning bokeh and low light shooting capabilities. It is designed as a replacement PK Mount lens suitable for full frame cameras like the K1 series.
Manual focus requires patience but provides full control over composition and depth. While the build is straightforward it delivers sharp results when used correctly in various lighting conditions.
Budget conscious photographers will appreciate this lens for its optical performance. It is a smart choice for those who want a fast prime without investing in premium brand optics.
Fast Aperture Performance
The F1.7 aperture lets in ample light for dim environments while creating beautiful background blur for subject separation.
Full Frame Compatibility
Designed to work seamlessly with Pentax K1 and K-1 Mark II cameras this lens covers the full sensor area effectively.
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3. Pentax 21977 DA 18-135mm – Best Premium K Mount Lens
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR Lens
18-135mm zoom range
Weather resistant design
DC motor autofocus
Super Protect coating
This all round zoom lens is a premium choice for photographers who need versatility across many scenarios. It combines a wide focal range with rugged weather resistance for reliable outdoor use.
Pros
- Versatile zoom range
- Weather sealed build
- Quiet DC autofocus
- SP coating protection
- Compact for travel
Cons
- Pricey investment
- Variable aperture limits
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The 75x zoom range covers everything from wide landscapes to telephoto portraits. Its DC motor ensures quick and quiet focusing which is ideal for video or candid shots.
Weather resistance makes it suitable for challenging environments where dust or moisture could be an issue. The compact design keeps portability high without sacrificing durability or optical quality.
Serious travelers and event shooters should consider this lens for its adaptability. It offers a robust build and excellent optical performance that justifies its higher cost for professionals.
Weather Resistance
Sealed against moisture and dust this lens withstands damp and inclement conditions for dependable performance outdoors.
Quiet Autofocus Motor
Direct Current motor supports quick quiet autofocus operation ideal for video recording and discreet photography sessions.
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4. Pentax SMC 50mm F1.7 – Classic Manual Focus Lens
Pentax SMC 50mm F1.7 Manual Focus MF Lens
50mm film lens
F1.7 aperture
Manual focus ring
Renewed condition
This renewed lens brings classic film era optics to modern digital bodies. It offers a nostalgic shooting experience with the reliability of a standard 50mm prime.
Pros
- Classic film optics
- Smooth focus ring
- Affordable renewed option
- K Mount native
- Simple design
Cons
- Limited availability
- Older coating tech
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The manual focus ring provides tactile feedback for precise adjustments. As a renewed item it offers a cost effective way to access traditional Pentax glass without new premium pricing.
Optical quality reflects older standards which may lack modern contrast or sharpness. However for those who value character and manual control this remains a compelling option for experimentation.
Film photographers transitioning to digital will find this lens familiar and enjoyable. It serves well as a secondary lens for creative projects where speed is not the priority.
Classic Optical Design
The design reflects traditional film era engineering offering unique rendering qualities that differ from modern corrected lenses.
Cost Effective Renewed Option
Renewed condition provides access to original Pentax optics at a lower price point for budget minded enthusiasts.
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5. Sigma 28-80mm F3.5-5.6 – Versatile AF Zoom
Sigma 28-80mm F3.5-5.6 Aspherical Macro HF Lens
28-80mm zoom
Aspherical elements
Macro capability
Pentax-AF mount
This zoom lens provides a flexible focal range for everyday shooting tasks. It includes aspherical elements to maintain sharpness across the zoom range effectively.
Pros
- Broad zoom range
- Aspherical optics
- Affordable price
- Auto focus support
- Macro function
Cons
- Older model
- Variable aperture range
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The macro capability adds versatility for close up photography without needing a dedicated macro lens. Auto focus support ensures convenience for quick capture opportunities.
Build quality reflects its vintage design but it still delivers reliable performance for basic needs. The variable aperture may limit low light performance at the telephoto end significantly.
Generalists needing one lens for multiple subjects will appreciate its adaptability. It is a solid secondary option for casual photographers looking for simplicity and ease of use.
Macro Functionality
Close focusing ability allows for detailed shots of small subjects making it useful for hobbyist macro work.
Aspherical Lens Elements
Aspherical components help reduce distortion and maintain image sharpness throughout the zoom range.
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6. Pentax Asahi SMC M 50mm – Vintage Glass
Pentax Asahi SMC M 1:2.8 50mm
50mm focal length
F2.8 aperture
Manual focus lens
PK Bajonett mount
This vintage Pentax lens offers robust build quality and sharp optics in a classic form. It is designed for manual focus users who appreciate traditional mechanical handling.
Pros
- High user ratings
- Vintage aesthetic
- Solid metal build
- Simple operation
- Sharp wide open
Cons
- Manual focus only
- Heavy compared to plastic
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The full metal construction ensures durability and a satisfying tactile feel during use. Despite its age it delivers optical performance that rivals newer plastic built lenses in many cases.
Focus accuracy relies on the photographer's skill since there is no automation. However the clear viewfinder and smooth ring make manual focusing intuitive and precise for still subjects.
Photographers seeking a durable and stylish lens will enjoy this option. It serves as a reliable prime for portraits and street photography where character and build quality matter most.
Durable Metal Build
The all metal construction resists wear and tear ensuring longevity even with frequent daily handling.
Classic Manual Handling
Traditional focus ring design provides a tactile experience that enhances connection with the shooting process.
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7. Pentax SMC 50mm F/2.0 – Portrait Prime
Pentax SMC 50mm F/2.0
50mm focal length
F2.0 aperture
Manual focus ring
Renewed condition
This renewed prime lens offers a bright aperture ideal for portrait work and low light scenarios. Its fixed focal length encourages intentional framing and composition choices.
Pros
- Wide F2.0 aperture
- Natural perspective
- Sharp optics
- Renewed value
- Bright viewfinder
Cons
- Manual focus only
- Limited stock
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The F2.0 aperture provides excellent subject isolation and clear visibility through the viewfinder. As a renewed product it presents an affordable path to quality Pentax glass.
Manual focus precision allows for deliberate shooting which benefits controlled portrait sessions. The optics deliver vibrant colors and clear details that enhance subject definition effectively.
Portraiture enthusiasts looking for shallow depth of field effects will find this lens useful. It balances optical quality with cost making it an attractive option for creative shooters.
Bright Aperture Control
F2.0 maximum aperture lets in significant light for dim shooting environments while creating soft background blur.
Natural Perspective
The 50mm focal length offers a field of view close to human eye vision for natural looking portraits.
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8. SMC Pentax-M 50mm F1.7 – Trusted Manual Prime
SMC Pentax-M 50mm F1.7
50mm focal length
F1.7 aperture
SMC coating
Manual focus lens
This lens is a staple for Pentax users seeking reliable manual focus performance. It features SMC coating for superior light transmission and color fidelity.
Pros
- Classic Pentax optics
- Superior coating
- Fast aperture
- Durable build
- Compact size
Cons
- Manual only
- Vintage design
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The F1.7 aperture supports creative control over depth of field and light intake. Users praise its sharpness and contrast even when shooting wide open.
Build quality reflects older manufacturing standards with solid materials and smooth operation. While it lacks modern automation it remains a favorite for photographers who enjoy manual control.
Shooters prioritizing optical quality over convenience should consider this lens. It offers a timeless shooting experience with results that stand the test of time well.
SMC Coating Quality
Super Multi Coating reduces flare and ghosting while enhancing color accuracy and contrast in diverse lighting.
Proven Optical Design
Decades of use have proven this optical formula remains competitive with modern lens designs in many scenarios.
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9. Pentax 21977 DA 18-135mm – All Rounder
Pentax 21977 DA 18-135mm
18-135mm zoom
Weather resistant
DC motor AF
SP coating
This versatile zoom covers a broad range of focal lengths for varied shooting needs. Its weather sealing ensures confidence when shooting in less than ideal conditions.
Pros
- Wide zoom range
- Weather sealing
- Fast quiet AF
- Compact weight
- Durable build
Cons
- Higher cost
- Variable aperture
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The DC motor delivers fast and quiet autofocus which is beneficial for both stills and video work. The extended 75x zoom range allows for capturing diverse subjects without changing lenses.
SP coating helps protect the lens front from environmental contaminants. It is compact enough for daily carry yet robust enough for outdoor adventures.
Photographers wanting a single lens solution will find this lens highly practical. It balances performance and portability making it a top choice for travel and events.
Extended Zoom Range
The 18 to 135mm range supports wide landscape shots and distant telephoto subjects with one lens setup.
Protective Coating
Super Protect coating repels dust water and grease making the lens easier to clean and maintain.
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10. K&F CONCEPT Lens Cap Kit – Essential Accessories
K&F CONCEPT Rear Lens Cap Kit
Body and rear caps
Hot shoe cover
Pentax K Mount
Microfiber cloth
This kit offers essential protection for Pentax camera bodies and lenses during storage and transport. It includes body caps rear lens caps and hot shoe covers to keep components safe.
Pros
- Complete protection
- Easy installation
- K Mount compatible
- Durable plastic
- Includes cleaning cloth
Cons
- Not an optical lens
- Generic fit
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The high impact plastic construction provides reliable resistance against dust moisture and fingerprints. Quick install design allows for easy attachment and removal using bayonet rotation.
Microfiber cloth included helps keep optics clean between shoots. Compatibility covers common Pentax K Mount models ensuring a snug and secure fit on your gear.
Photographers looking to protect their investment will find this kit valuable. It complements any lens collection by ensuring that your camera remains clean and ready for use.
Complete Camera Protection
Body and rear caps protect against dust and scratches ensuring your camera remains in optimal working condition.
Quick Installation
Strict adherence to bayonet specs ensures tight closure preventing fine particle entry and easy removal by rotation.
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Buying Guide – How to Choose the Best K Mount Lenses for Pentax Camera
Selecting the right lens requires balancing optical performance build quality and budget. Below are key factors to consider when shopping for K Mount lenses for your Pentax system.
Focal Length Needs
Focal length determines your field of view and framing capabilities. Wide angle lenses like 18mm suit landscapes while 50mm primes are ideal for portraits and street shots.
Consider what subjects you photograph most often to narrow down which focal length range will serve you best.
Aperture Size
Larger apertures allow more light into the sensor enabling better low light performance and shallower depth of field.
Look for lenses with f28 or wider if you frequently shoot indoors or seek creative background blur.
Autofocus vs Manual
Modern lenses offer autofocus for convenience while vintage primes rely on manual focus for tactile control and precision.
Decide if you need fast auto focus for action or if manual focus fits your creative workflow better.
Build Quality and Weather Sealing
Durable materials and weather sealing protect against dust moisture and temperature changes during outdoor shoots.
Invest in weather resistant lenses if you often film in challenging environments or rough conditions.
Optical Coatings
High quality coatings like Super Protect or SMC reduce flare ghosting and improve contrast and color accuracy.
Check for advanced coatings to ensure sharp images even in backlit or harsh sunlight situations.
Zoom vs Prime
Zoom lenses offer flexibility across multiple focal lengths while primes deliver superior sharpness and wider maximum apertures.
Choose a zoom for versatility or a prime for optical quality depending on your shooting priorities.
Price and Value
Prices vary widely from budget options to premium professional glass. Determine your budget range before shopping to find the best value.
Consider renewed or used lenses to access higher quality optics at more affordable price points.
Compatibility
Ensure the lens is designed for your specific Pentax K Mount camera model to avoid fit or performance issues.
Verify compatibility with both full frame and crop sensor bodies for full system flexibility.
How to Use and Care for Your K Mount Lenses for Pentax Camera
Attach lenses by aligning the red dots on the lens and camera mount then rotate clockwise until it clicks securely. Check that the lens is firmly seated before shooting.
Clean optics using a microfiber cloth and air blower to remove dust and smudges. Avoid using harsh chemicals on the glass surface to prevent coating damage.
Store lenses in a cool dry place with lens caps on when not in use to prevent dust and scratches. Use silica gel packets in your camera bag to control humidity.
Frequently Asked Questions
Are K Mount lenses compatible with modern Pentax DSLRs?
Yes most K Mount lenses are compatible with modern Pentax DSLRs as they use the same bayonet mount. However autofocus and exposure features may vary depending on the lens model and camera body generation.
What is the difference between DA and DFA lenses?
DA lenses are designed specifically for Pentax APS-C sensors while DFA lenses are optimized for full frame sensors but work well on crop bodies too. Both provide excellent optical performance for their target formats.
Do older manual focus lenses work on digital Pentax cameras?
Manual focus K Mount lenses can be used on digital Pentax cameras with proper exposure settings. You may need to enable aperture priority or manual exposure mode to achieve correct results.
What does weather resistant mean on Pentax lenses?
Weather resistant indicates the lens has seals and gaskets that help prevent moisture and dust from entering the optics. It allows safe use in light rain or humid conditions.
How do I clean lens coatings safely?
Use a soft microfiber cloth and lens cleaning fluid sparingly. Wipe gently in circular motions from the center outward to avoid scratching the coatings.
Is it worth buying a renewed lens?
Renewed lenses offer significant savings and are inspected for functionality. They are worth considering if you want higher end glass without paying full retail prices for new items.
Can I use third party K Mount lenses?
Third party lenses from brands like Sigma and Tamron often offer compatible K Mount options. Ensure compatibility with your specific camera model before purchasing.
Final Thoughts on Choosing the Best K Mount Lenses for Pentax Camera
This guide has explored ten top rated lenses that balance optical performance and value for Pentax shooters. Whether you choose a premium zoom or budget prime you now have a clear view of your options.
Prioritize focal length and build quality when narrowing your choice. A lens that matches your typical shooting environment and subject types will deliver the most satisfying results.
Remember to check current listings for availability and pricing as these can change over time. Investing in the right lens today will enhance your photography for years to come.