Andoer 50 mm F1.7 Wide Aperture Manual Focus
5.0Editor score
Manual focus prime lens
Large aperture F1.7
PK Mount replacement
Full frame compatible
In this guide
Choosing the right glass for your camera body can transform your photography experience significantly. Whether you shoot portraits or landscapes, having reliable optics matters immensely for image quality and creative control in various situations.
We analyzed ten popular K Mount options available for Pentax shooters based on their specifications, user ratings, and unique features. This list covers everything from budget primes to versatile zooms for different shooting styles.
Each pick highlights key strengths and ideal use cases to help you match lenses with your specific goals. Please note that product availability and pricing may change frequently on retailer sites so check details before buying.
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
High delineation performance
F2.4 high brightness
Super protect coating
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL
4.5Editor score
Extended 75X zoom range
Weather resistant design
Direct Current motor
Super Protect coating
Top 10 Best K Mount Lenses for Pentax Camera in 2026 Compared
The following table provides a side-by-side overview of each lens option including key specifications and links to learn more about their specific capabilities and user reviews online.
ProductsSpecificationsEditor scorePrice
Best Budget
Andoer 50mm F1.7
50mm focal length
F1.7 aperture
Manual focus only
PK Mount compatible
5.0Editor score
Editor's Choice
Pentax SMC PENTAL-Da 35mm
35mm focal length
F2.4 aperture
Aspherical lens design
SP coating included
4.6Editor score
Best Premium
Tamron AF 70-300mm
70-300mm range
F4-5.6 aperture
Telephoto zoom lens
Macro capability
4.1Editor score
Pentax SMC 50mm F1.7
50mm focal length
F1.7 aperture
Manual focus lens
Renewed condition
3.0Editor score
Sigma 28-80mm
28-80mm range
F3.5-5.6 aperture
Aspherical macro lens
New lens model
Pentax Asahi SMC M 50mm
50mm focal length
F2.8 aperture
Vintage manual focus
PK Bajonett mount
5.0Editor score
Pentax SMC 50mm F/2.0
50mm focal length
F2.0 aperture
Prime portrait lens
Manual focus ring
SMC Pentax-M 50mm
50mm focal length
F1.7 aperture
Manual focus lens
Classic design
4.2Editor score
Pentax 21977 DA 18-135mm
18-135mm range
F3.5-5.6 aperture
Weather resistant
DC motor AF
4.5Editor score
K&F CONCEPT Kit
Body lens caps
Hot shoe cover
Pentax K Mount
Cleaning cloth
4.7Editor score
1. Andoer 50 mm F1.7 Wide Aperture Manual Focus – Best Budget Prime
Andoer 50 mm F1.7 Wide Aperture Manual Focus
PK Mount system
Manual focus ring
Full frame support
50mm focal length
The Andoer 50mm F1.7 is a prime lens designed for Pentax K Mount cameras with a perfect manual focus experience. Its high rating suggests users appreciate the optical performance relative to the cost especially for full frame bodies like the K-1.
Pros
- Excellent value
- Wide aperture
- Full frame use
- Manual focus smooth
Cons
- No autofocus
- Basic build
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With an F1.7 aperture this lens allows plenty of light to reach the sensor making it suitable for low light photography and achieving shallow depth of field effects easily. The PK Mount replacement ensures compatibility with modern Pentax digital cameras.
As a manual focus lens it requires patience and practice to get sharp shots compared to autofocus options. However this limitation is acceptable for those seeking cost effective glass and who enjoy the creative control manual focus provides.
This lens is ideal for photographers on a budget who want to experiment with primes without spending much. It is a strong recommendation for beginners or hobbyists looking for a lightweight and affordable portrait or street option.
Affordable Optical Performance
Shooters get decent image quality without the premium price tag associated with branded Pentax glass.
Full Frame Compatibility
Designed to work seamlessly with full frame models like the K-1 ensuring no crop factor issues.
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2. Pentax SMC PENTAL-Da 35mm – Top Overall Kit Lens
Pentax SMC PENTAL-Da 35mmF2.4AL Standard Lens
35mm equivalent
F2.4 aperture
Aspherical elements
Super protect coat
The Pentax SMC PENTAL-Da 35mm is a standard lens that offers excellent delineation performance for everyday shooting. Its high rating reflects its ability to deliver sharp images from center to edges which is rare for compact kit lenses.
Pros
- Compact size
- Sharp edges
- High brightness
- Durable coating
Cons
- No zoom
- Fixed focus
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Featuring hybrid aspherical lenses this glass corrects various aberrations to maintain high contrast throughout the focal range. The F2.4 aperture provides high brightness allowing easy visibility in the viewfinder even in dimmer conditions.
One trade-off is its fixed focal length which means you must move your feet to frame shots. But this encourages better composition and the lightweight design makes it easy to carry around all day without fatigue.
This lens is perfect as a first or everyday lens for snapshots landscapes and portraits. We recommend it for anyone wanting a reliable lightweight companion that performs well in various lighting scenarios.
Superior Sharpness
Optical design ensures high contrast and clear details across the entire frame.
Weather Ready Coating
SP coating repels dust water and grease to keep the lens surface clean easily.
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3. Pentax 21977 DA 18-135mm – Premium Travel Zoom
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL
18-135mm range
Weather resistant
DC motor AF
SP coating
The Pentax 21977 DA 18-135mm offers an extended 75X zoom range ideal for a wide range of shooting conditions. Its rating supports the claim of versatility and durability making it a great choice for travelers who want one lens for everything.
Pros
- Versatile zoom
- Weather sealed
- Quick AF
- Lightweight
Cons
- Complex optics
- Higher cost
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With weather resistance this lens can handle damp and inclement conditions while the DC motor supports quick and quiet autofocus operation. The Super Protect coating helps repel dust and water ensuring easier cleaning and long-term reliability.
The main trade-off is the higher cost compared to simpler kits but the weather sealing and zoom range justify the investment for serious shooters. You gain flexibility without needing to change lenses frequently in unpredictable environments.
We recommend this lens for photographers who prioritize convenience and durability. It is an excellent premium choice for travel or outdoor photography where you need to adapt quickly to changing subjects and lighting.
All-Weather Durability
Build quality stands up to moisture and dust allowing use in challenging environments.
Fast Silent Focus
DC motor ensures autofocus is fast and quiet for both stills and video.
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4. Tamron AF 70-300mm – Telephoto Zoom Option
Tamron AF 70-300mm f/4.0-5.6 Di LD Macro
70-300mm zoom
Macro feature
F4-5.6 range
Telephoto reach
This Tamron lens provides a 70-300mm telephoto zoom range for capturing distant subjects with clarity. The inclusion of a macro function adds value allowing you to shoot small details without needing separate equipment.
Pros
- Long reach
- Macro capability
- Zoom flexibility
Cons
- Variable aperture
- Size weight
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The aperture range of F4 to F5.6 varies as you zoom which can impact low light performance compared to constant aperture lenses. However the reach it provides makes it useful for wildlife or sports photography.
Shooting with variable aperture means you may need to adjust ISO in bright light to maintain shutter speed. This is acceptable for the price point but consider your needs if light stability is crucial.
Buyers looking for an affordable way to add telephoto capability to their kit will find this useful. It is a solid addition for those who want reach and macro versatility without breaking the bank.
Macro Functionality
Close focusing capabilities let you capture fine details in addition to distant scenes.
Long Focal Range
300mm reach allows you to frame subjects from a distance with impressive detail.
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5. Pentax SMC 50mm F1.7 – Classic Film Lens Option
Pentax SMC 50mm F1.7 (Renewed)
50mm prime
F1.7 aperture
Manual focus
Renewed condition
This renewed Pentax SMC 50mm F1.7 brings the charm of film era optics to digital bodies. Being a renewed product means it has been inspected but the rating suggests some users might find condition variable.
Pros
- Classic look
- Manual focus
- Affordable
Cons
- Used condition
- No modern features
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As a manual focus lens it provides a tactile shooting experience that many photographers enjoy. The F1.7 aperture allows for good background blur and low light capability on modern digital cameras.
Since this is a renewed item there may be cosmetic wear or previous usage marks that are normal for refurbished goods. This is acceptable if price is a major factor and you trust the seller's inspection.
This lens is great for enthusiasts who appreciate vintage glass aesthetics. Consider buying this if you want a simple prime lens for street or portrait work and can accept potential signs of prior use.
Vintage Optical Character
Older glass designs often produce unique rendering and colors modern lenses lack.
Cost Effective Choice
Renewed status usually means a lower price than brand new equivalents.
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6. Sigma 28-80mm – Versatile Standard Zoom
Sigma 28-80mm F3.5-5.6 Aspherical Macro
28-80mm range
F3.5-5.6
Aspherical lens
Macro focus
The Sigma 28-80mm is a standard zoom lens offering coverage from wide angle to short telephoto. With aspherical macro features it aims to correct aberrations and provide decent image quality for everyday shots.
Pros
- Wide range
- Aspherical elements
- Compact size
Cons
- Variable aperture
- Older design
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The variable aperture of F3.5 to F5.6 means light gathering capability changes as you zoom which can be challenging in dim settings. However for general use this trade-off allows for a lighter and more compact design.
Since this is an older model you might not find modern autofocus speeds compared to newer releases. But the mechanical build and glass quality remain relevant for those who want a simple lightweight zoom.
We suggest this lens for casual shooters or those needing a travel option. It is suitable for documenting events or landscapes where quick focal length changes are needed without carrying extra gear.
Aspherical Optics
Lens design helps reduce distortions and improves sharpness across the focal range.
Macro Capability
Close up focus allows for some detailed shots beyond standard portrait or landscape use.
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7. Pentax Asahi SMC M 50mm – Vintage Portrait Prime
Pentax Asahi SMC M 1:2.8 50mm
50mm focal length
F2.8 aperture
PK Bajonett mount
Vintage design
This Pentax Asahi SMC M 50mm lens is a vintage classic that maintains good functionality. Its high rating indicates that users are satisfied with its performance and condition despite being an older model.
Pros
- Solid build
- F2.8 aperture
- Manual focus
Cons
- Older model
- No automation
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The F2.8 aperture offers a balance between brightness and depth of field control making it a solid portrait choice. The PK Bajonett mount ensures direct fit with Pentax K Mount cameras without adapters.
Manual focus only means you must rely on manual dexterity which can slow down action shooting. However for deliberate work like portraits or static scenes this is often a desired characteristic for creative control.
If you value robust metal construction and classic optical rendering this lens is worth considering. It is a great option for collectors or shooters who want a durable prime with a distinct look.
Vintage Metal Build
High quality materials ensure the lens feels solid and durable in the hand.
Prime Simplicity
Fixed focal length forces you to focus on composition and movement instead of zoom.
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8. Pentax SMC 50mm F/2.0 – Bright Renewed Prime
Pentax SMC 50mm F/2.0 Lens Prime
50mm prime
F2.0 aperture
Renewed condition
Manual focus
The Pentax SMC 50mm F/2.0 lens offers bright optics for capturing sharp images even in low light. As a renewed product it provides access to quality glass at a lower price point for budget aware shoppers.
Pros
- Bright aperture
- Renewed value
- Durable build
Cons
- Used gear
- Manual focus
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Its wide maximum aperture of F/2.0 allows for beautiful shallow depth of field and bokeh effects in portraits. The manual focus ring gives you precise control over where the lens focuses for creative shots.
Because this is a renewed lens you may need to inspect it upon arrival for any functional issues. This is acceptable given the lower cost but ensure the seller has a good return policy.
We recommend this lens for those seeking portrait capabilities without a high price tag. It is a great addition to your kit if you want a reliable prime that delivers crisp results and vibrant colors.
Wide Aperture Benefits
F2.0 helps freeze action in dim light and creates dreamy blurred backgrounds.
Renewed Savings
Certified refurbished lenses are tested for function while costing less than new.
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9. SMC Pentax-M 50mm – Classic Manual Focus Prime
SMC Pentax-M 50mm F1.7
50mm focal length
F1.7 aperture
Manual focus
Classic design
The SMC Pentax-M 50mm F1.7 is a manual focus lens known for its reliable optical quality. With a solid rating users often appreciate its consistency and ease of use for static subjects.
Pros
- Optical quality
- F1.7 brightness
- Manual control
Cons
- Manual focus only
- Older tech
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The F1.7 aperture allows for strong low light performance and a shallow depth of field which is perfect for portraits. Its classic design means it integrates well with both film and digital bodies.
Manual focus might limit its use in fast action scenarios but for controlled environments it shines. The simplicity of the lens design ensures fewer points of failure and long-lasting reliability.
If you enjoy the process of manually focusing and want a reliable prime lens this is a great pick. It works well for street or landscape photography where you have time to compose each shot carefully.
Proven Optical Design
Decades of design refinement ensure sharp images and accurate color rendition.
Manual Focus Tactility
Ring feel is smooth and precise for intentional focus on specific subjects.
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10. K&F CONCEPT Kit – Essential Protection Set
K&F CONCEPT Rear Lens Cap & Body Cap
Body cover cap
Rear lens cap
Hot shoe cover
Cleaning cloth
This accessory kit ensures your Pentax equipment stays protected with covers for the body lens and hot shoe. Its high rating suggests users find it effective and durable for keeping dust and moisture away.
Pros
- Complete protection
- Easy install
- High rating
Cons
- Accessory only
- Plastic build
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Made of high-impact plastic these covers are tough and easy to carry. They provide physical protection for the sensor and lens mount ensuring optimal condition for a long time.
Since these are accessories they do not affect optical performance but they add peace of mind. The inclusion of a cleaning cloth helps maintain your gear without extra purchases or trips to a store.
If you care about maintaining your gear this kit is a smart addition to your bag. It is a must-have for travelers or daily shooters who want to protect their investment from dust and scratches.
Comprehensive Coverage
All key interfaces are covered to prevent debris entry into your camera system.
Simple Installation
Bayonet style design ensures tight fits that stay secure during transport or use.
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Buying Guide – How to Choose the Best K Mount Lenses for Pentax Camera
Selecting the right lens involves considering your shooting style, budget, and the specific needs of your camera body. Here are key factors to keep in mind when shopping for K Mount optics.
Focal Length
Focal length determines how much of the scene you capture and how large subjects appear. Wide angles like 18mm are great for landscapes while primes like 50mm suit portraits.
Choose a length that aligns with your most common subjects to avoid unnecessary gear clutter.
Aperture
Aperture controls light intake and depth of field. Wider apertures like F1.7 are better for low light and background blur whereas smaller ones like F5.6 are often found on zooms.
Prioritize wider apertures if you shoot indoors or at night to keep ISO lower.
Autofocus
Autofocus lenses make capturing moving subjects easier while manual focus lenses offer more control for still scenes. Modern digital cameras often favor AF for general usability.
If you value speed and convenience check that the lens supports autofocus on your camera body.
Weather Sealing
Weather sealing protects your lens from dust and moisture making it durable for outdoor use. Look for labels like WR or DC if you plan to shoot in varied conditions.
Investing in sealed glass saves money on repairs and keeps your gear working longer.
Build Quality
Build quality affects how the lens feels in your hands and its longevity. Metal mounts and solid barrel construction usually indicate better durability than plastic alternatives.
Check reviews for signs of wear resistance especially if you travel frequently with your camera.
Optical Features
Features like aspherical elements or super protect coatings help reduce aberrations and keep the lens clean. These details contribute to sharper images and easier maintenance.
Look for optical enhancements that match your quality expectations such as low distortion or high contrast.
Budget
Your budget sets the boundaries for what you can afford but also influences the type of glass you get. Renewed or manual focus options often provide better value for hobbyists.
Balance cost with performance needs to ensure you get a lens that serves your photography goals.
Compatibility
Ensure the lens matches your specific Pentax K Mount body to avoid issues with aperture control or autofocus. Some older lenses may require adapters or manual operation on newer digital cameras.
Verify the mount type listed in the product specs before purchasing to guarantee a proper fit.
How to Use and Care for Your K Mount Lenses for Pentax Camera
Attach the lens by aligning the marks on the barrel and camera body then rotating until it clicks securely. Remove the lens cap before shooting to prevent accidental blurry images caused by covered glass.
Clean the front element with a soft microfiber cloth and lens solution only when necessary to avoid scratching coatings. Use a blower to remove dust from the mount area before attaching it to the camera.
Store the lens with the rear cap on and in a dry place to prevent mold or fogging inside the glass. Regular inspections for dust or fungus ensure your investment stays in good condition for years to come.
Frequently Asked Questions
Are K Mount lenses compatible with all Pentax cameras?
Most K Mount lenses work with digital and film Pentax bodies but autofocus functionality may vary on older manual focus glass. Always check the specific mount type to ensure your camera supports the lens features you need.
Can I use these lenses for portrait photography?
Yes primes like 50mm or 35mm are excellent for portraits due to their natural field of view and wide apertures. They allow you to achieve shallow depth of field and isolate subjects from the background effectively.
What does weather resistance mean on these lenses?
Weather resistance indicates the lens has seals to protect against dust and moisture allowing use in light rain or dusty environments. It is not waterproof but adds durability for outdoor photographers in challenging conditions.
Are manual focus lenses harder to use?
Manual focus lenses require you to turn the ring to sharpen the image which takes practice but offers precise control. They are great for learning composition and working with static subjects where speed is not critical.
How do I protect my lens from dust?
Keep caps on when not in use and use a blower to remove dust from the mount and glass. Investing in a good lens kit ensures the sensor and glass stay free of debris and scratches during daily use.
Do these lenses come with warranties?
Warranties vary by seller and whether the lens is new or renewed so always check the product description for details. Renewed items may have limited warranty terms compared to brand new purchases from official retailers.
Which lens is best for low light?
Primes with wide apertures like F1.7 or F2.0 allow more light to hit the sensor making them ideal for low light situations. They let you shoot at lower ISOs and faster shutter speeds to avoid blur in dim environments.
Final Thoughts on Choosing the Best K Mount Lenses for Pentax Camera
We have reviewed ten distinct K Mount options ranging from affordable primes to versatile weather sealed zooms for Pentax shooters. Each pick offers unique strengths depending on your budget and shooting style.
Consider your primary needs whether it is light performance or zoom flexibility when selecting from this list. Balancing quality with practicality ensures you get the most value for your money.
Remember to check current availability and pricing before finalizing your purchase as these details can change over time. We hope this guide helps you find the perfect lens to elevate your photography experience.