Andoer 50 mm F1.7 Wide Aperture Manual Focus
5.0Editor score
Large aperture for low light
Manual focus prime lens
Compatible with K1 models
In this guide
Finding the right glass for your camera body is crucial for capturing stunning images. K Mount Lenses for Pentax Camera offer a wide variety of focal lengths and apertures to suit any style.
We compared ten top rated options based on optical quality build durability and user feedback. Our analysis covers primes zooms and manual focus lenses to ensure you find a perfect match.
Each pick highlights key features and performance traits. Note that availability and pricing can change frequently so check current listings before making your final decision today.
Top 3 Picks for Best K Mount Lenses for Pentax Camera
Pentax SMC PENTAL-Da 35mmF2.4AL Standard Lens
4.6Editor score
In-camera shake reduction compatible
Hybrid aspherical lenses for sharpness
Compact and lightweight design
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL
4.5Editor score
Weather resistant construction
75X zoom range
DC motor for quiet AF
Top 10 Best K Mount Lenses for Pentax Camera in 2026 Compared
The following table provides a side by side comparison of all ten lenses reviewed in this guide to help you quickly identify the best fit for your photography needs.
ProductsSpecificationsEditor scorePrice
Best Budget
Andoer 50 mm F1.7
50mm F1.7 Aperture
Manual Focus Prime
PK Mount Replacement
Full Frame Compatible
5.0Editor score
Editor's Choice
Pentax SMC PENTAL-Da 35mm
35mm F2.4 Aperture
Aspherical Lens Elements
Super Protect Coating
Compact Lightweight Build
4.6Editor score
Best Premium
Tamron AF 70-300mm f/4.0-5.6
70-300mm Telephoto Zoom
Macro Capability
LD Lens Elements
Digital SLR Compatible
4.1Editor score
Pentax SMC 50mm F1.7 Manual
50mm F1.7 Aperture
Manual Focus Lens
Film Lens Design
Renewed Condition
3.0Editor score
Sigma 28-80mm F3.5-5.6
28-80mm Zoom Range
Aspherical Elements
Macro Functionality
HF Lens Motor
Pentax Asahi SMC M 50mm
50mm F2.8 Aperture
SMC Coating
Manual Focus Ring
Vintage PK Mount
5.0Editor score
Pentax SMC 50mm F/2.0 Prime
50mm F2.0 Aperture
Prime Portrait Lens
Metal Mount
Renewed Quality
SMC Pentax-M 50mm F1.7
50mm F1.7 Aperture
Manual Focus Design
SMC Coating
Classic Optical Formula
4.2Editor score
Pentax 21977 DA 18-135mm
18-135mm Zoom Range
Weather Resistant
DC Motor AF
SP Coating
4.5Editor score
K&F CONCEPT Rear Lens Cap Kit
Lens Cap Kit
Hot Shoe Cover
Microfiber Cloth
K Mount Compatible
4.7Editor score
1. Andoer 50 mm F1.7 – Best Budget K Mount Lens
Andoer 50 mm F1.7
50mm F1.7 Aperture
Manual Focus Operation
PK Mount Compatibility
Full Frame Support
The Andoer 50 mm F1.7 is a standout choice for photographers seeking an affordable prime lens. With a perfect rating from users, it delivers impressive optical performance at a fraction of the cost of premium brands.
Pros
- Excellent value for money
- Large aperture for bokeh
- Lightweight and portable
- Simple manual focus ring
- Solid build quality
Cons
- No autofocus capability
- Manual focus requires practice
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Its large F1.7 aperture allows for beautiful background separation and low light shooting without needing a flash. The manual focus mechanism is smooth and precise, making it ideal for portrait and street photography enthusiasts who value control.
While the lack of autofocus might be a trade-off for some, the lens compensates with its compact size and sharp image quality. Users appreciate the straightforward design that focuses on core optical performance rather than complex electronics.
This lens is perfect for beginners or those looking to expand their kit without breaking the bank. It offers a true prime experience that encourages creative composition and skill development.
Affordable Prime Performance
Delivers sharp images and beautiful bokeh at a budget friendly price point.
Manual Focus Control
The smooth focus ring allows for precise adjustments in creative photography.
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2. Pentax SMC PENTAL-Da 35mm – Best Overall K Mount Lens
Pentax SMC PENTAL-Da 35mm
35mm F2.4 Aperture
Aspherical Lens Elements
Super Protect Coating
In-Camera SR Compatible
The Pentax SMC PENTAL-Da 35mm stands out as an ideal first lens or daily driver. Its high delineation performance ensures sharp images from minimum to maximum distances thanks to hybrid aspherical elements.
Pros
- High delineation performance
- Compact and lightweight
- Dust and water resistant
- Great for everyday use
- Sharp edge to edge
Cons
- F2.4 aperture is modest
- No weather sealing on lens
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At only 124 grams it is incredibly light and easy to carry everywhere. The Super Protect Coating makes it resistant to dust and water drops which is a huge plus for outdoor photographers facing changing conditions.
While the F2.4 aperture is not the widest available it provides high brightness for the viewfinder and allows for handheld shooting in lower light. The in-camera shake reduction adds stability without increasing lens weight.
This lens is highly recommended for anyone wanting a versatile standard focal length that handles portraits landscapes and snapshots with ease. It offers excellent value and performance for the Pentax ecosystem.
Superior Sharpness
Hybrid aspherical lenses correct aberrations for clear images across the frame.
Everyday Portability
Its tiny size makes it perfect for carry-on travel or daily outings.
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3. Pentax 21977 DA 18-135mm – Best Premium K Mount Lens
Pentax 21977 DA 18-135mm
18-135mm Zoom Range
Weather Resistant Construction
DC Motor AF
SP Coating Protection
The Pentax 21977 DA 18-135mm is a workhorse lens designed for serious photographers. Its extended 75X zoom range covers everything from wide angles to telephoto making it perfect for diverse shooting conditions.
Pros
- Weather resistant design
- 75X zoom range
- Quiet autofocus motor
- High image quality
- Durable build
Cons
- Higher price point
- Not the lightest option
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Weather resistance is a key feature here allowing you to shoot in damp or inclement conditions without worry. The direct current motor ensures quick and quiet autofocus which is essential for video and candid shots.
The Super Protect Coating on the front element helps repel dust and grease keeping the lens cleaner for longer. This durability combined with optical excellence justifies its place as a premium option.
If you need one lens to handle most situations this is it. It is ideal for travel or events where changing lenses frequently is not practical and reliability is paramount.
Weather Resistance
Built to withstand damp conditions ensuring reliable performance outdoors.
Versatile Zoom Range
The 18-135mm span captures wide scenes and distant subjects effortlessly.
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4. Tamron AF 70-300mm f/4.0-5.6 – Best Telephoto Zoom
Tamron AF 70-300mm f/4.0-5.6
70-300mm Focal Length
Macro Capability
LD Lens Elements
Digital SLR Compatible
The Tamron AF 70-300mm is a versatile telephoto zoom that brings distant subjects closer. With a minimum focus distance as short as 37.4 inches it offers macro capabilities that are rare in this class.
Pros
- Long reach for wildlife
- Macro functionality
- LD elements reduce aberration
- Lightweight telephoto option
- Affordable zoom choice
Cons
- Variable aperture limit
- Autofocus can be slow
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LD lens elements help correct chromatic aberration ensuring sharper images even at the long end of the zoom range. It is a solid choice for sports wildlife or nature photography on a budget.
While the aperture varies from f/4 to f/5.6 it still provides enough light for daytime shooting. The build is sturdy and it fits well with Pentax digital SLR cameras.
Photographers looking to experiment with telephoto shots will find this lens very useful. It balances price and performance well for those who need extra reach without high costs.
Macro Versatility
Close focusing ability allows for detailed shots of small subjects.
Telephoto Reach
The 300mm maximum focal length captures distant action clearly.
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5. Pentax SMC 50mm F1.7 Manual – Best Classic Manual Lens
Pentax SMC 50mm F1.7 Manual
50mm F1.7 Aperture
Manual Focus Design
Film Lens Origin
Renewed Condition
This Pentax SMC 50mm F1.7 Manual lens brings vintage charm to modern bodies. As a film lens adapted for digital it offers a unique rendering that many photographers love for its character.
Pros
- Classic optical character
- Smooth manual focus
- Renewed for value
- Metal mount durability
- Great for learning
Cons
- Condition varies
- No electronics
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The manual focus ring is buttery smooth allowing for precise control. Even though it is sold as renewed it maintains the build quality expected from Pentax optics with a sturdy metal mount.
Users should note that the condition may vary with some showing minor signs of use. However this is expected for renewed items and does not affect the optical performance significantly.
It is an excellent choice for those who enjoy the process of manual focusing and want a timeless lens. It serves well for portraits and artistic projects where focus is key.
Vintage Character
Delivers a classic look that modern lenses often lack.
Manual Control
Encourages patience and precision in composition and focus.
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6. Sigma 28-80mm F3.5-5.6 – Best Standard Zoom
Sigma 28-80mm F3.5-5.6
28-80mm Zoom Range
Aspherical Elements
HF Lens Motor
Macro Functionality
The Sigma 28-80mm covers a useful range for everyday shooting. From wide angle to short telephoto it handles many common scenarios without needing to swap lenses frequently.
Pros
- Wide to short telephoto
- Aspherical glass
- Macro capability
- Smooth AF motor
- Versatile use
Cons
- Older model
- Average image quality
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Aspherical elements help maintain sharpness across the frame while the HF lens motor ensures reasonably quiet autofocus. The macro function adds a bit of extra flexibility for close-ups.
This lens is a practical tool for general photography. It balances size and performance well making it a good companion for casual outings or family events.
Photographers seeking a simple all around lens will find value here. It is a solid option for those who prefer a standard zoom over primes.
Standard Zoom Utility
The 28-80mm range fits most common photography needs well.
Aspherical Design
Optical elements reduce distortion for sharper images.
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7. Pentax Asahi SMC M 50mm – Best Vintage Prime
Pentax Asahi SMC M 50mm
50mm F2.8 Aperture
SMC Coating
Manual Focus
Vintage PK Mount
The Pentax Asahi SMC M 50mm is a classic prime that offers a pure manual experience. Its SMC coating ensures good light transmission and color fidelity despite its age.
Pros
- Fully manual control
- SMC coating
- Classic build
- Vintage aesthetic
- Good value
Cons
- Older design
- Requires focus skills
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The build quality is robust with metal components that feel durable. It is fully manual which appeals to enthusiasts who enjoy the tactile aspect of photography.
While it may lack modern features like autofocus it excels at providing a unique perspective. The vintage look of the lens also adds character to your camera setup.
This lens is perfect for those who appreciate older glass and want to shoot with intention. It is a great way to learn manual focusing techniques.
Classic Build
Durable metal construction ensures longevity and a premium feel.
SMC Optics
Super Multi Coating delivers clear and vibrant images.
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8. Pentax SMC 50mm F/2.0 Prime – Best Portrait Option
Pentax SMC 50mm F/2.0 Prime
50mm F2.0 Aperture
Portrait Lens
Metal Mount
Renewed
This Pentax SMC 50mm F/2.0 lens is designed for stunning portrait photography. The wide F2.0 aperture allows for beautiful shallow depth of field and beautiful bokeh in low light.
Pros
- Bright F2.0 aperture
- Ideal for portraits
- Manual focus ring
- Renewed price
- Natural perspective
Cons
- Renewed condition risk
- Manual focus only
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It features a manual focus ring that gives you precise control over focus points. The metal mount ensures durability and a secure fit on your K Mount camera body.
As a renewed item it offers a chance to own quality glass at a lower cost. It is ideal for street photography and everyday use as well as portraits.
Photographers looking for a bright prime lens will appreciate its capabilities. It provides a natural perspective that renders subjects in a flattering way.
Bright Aperture
F2.0 allows more light and better background separation.
Manual Precision
Focus ring allows fine adjustments for sharp subjects.
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9. SMC Pentax-M 50mm F1.7 – Best Manual Focus Prime
SMC Pentax-M 50mm F1.7
50mm F1.7 Aperture
Manual Focus Ring
SMC Coating
Classic Optical
The SMC Pentax-M 50mm F1.7 is a beloved lens among manual focus enthusiasts. Its classic optical formula produces sharp images with pleasing contrast and color.
Pros
- Smooth focus ring
- F1.7 brightness
- Proven optics
- Durable construction
- Lightweight
Cons
- Manual focus
- No electronic contacts
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The manual focus ring is well damped providing smooth movement during focusing. The SMC coating helps reduce flare and ghosting ensuring high contrast images.
This lens is a staple for Pentax shooters who enjoy the tactile experience. It works well for portraits street photography and general use.
It is a reliable choice for those who value optical quality over modern automation. Its simplicity is its greatest strength for creative photography.
Classic Optics
Proven glass design delivers sharp images and accurate colors.
Damped Focus
Smooth manual ring allows for precise focus control.
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10. K&F CONCEPT Rear Lens Cap Kit – Best Lens Accessory
K&F CONCEPT Rear Lens Cap Kit
Lens Cap Kit
Hot Shoe Cover
Microfiber Cloth
K Mount Compatible
This kit includes essential caps and covers to protect your Pentax gear. The rear lens cap and body cover keep dust out of the sensor when lenses are removed.
Pros
- Complete protection kit
- Fits K Mount
- High impact plastic
- Easy install
- Cleaning cloth included
Cons
- Accessory only
- Basic design
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High impact plastic ensures tough resistance to drops and daily wear. The hot shoe protector keeps moisture out of the interface ensuring reliable flash operation.
With a microfiber cleaning cloth included you can maintain your lenses easily. It is a practical set that complements any lens collection.
Photographers should always protect their investment with proper covers. This kit provides convenient and effective protection for your K Mount equipment.
Complete Protection
Includes all necessary covers for body and lens interfaces.
Durable Design
High impact plastic withstands drops and rough handling.
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Buying Guide – How to Choose the Best K Mount Lenses for Pentax Camera
Selecting the right lens involves considering several factors including focal length aperture and build quality. This guide outlines the key aspects to evaluate before you buy.
Focal Length
Focal length determines the angle of view and magnification of your images. Prime lenses offer fixed focal lengths like 50mm while zooms provide a range like 18-135mm. Choose based on the subjects you shoot most often.
Consider whether you need versatility from a zoom or the simplicity of a prime.
Aperture
Aperture controls the amount of light entering the lens and depth of field. Larger apertures like f/1.7 allow for better low light performance and more background blur.
Wider apertures are ideal for portraits while smaller ones suit landscapes.
Autofocus
Autofocus capability is critical for fast moving subjects or street photography. Manual focus lenses require more time to adjust but offer precise control.
Evaluate if you prefer the speed of AF or the calm of MF.
Build Quality
Build quality affects durability and weather resistance. Metal mounts and sealed bodies protect against dust and moisture better than plastic ones.
Invest in sturdy construction if you shoot outdoors frequently.
Optical Elements
Special elements like aspherical or low dispersion glass reduce aberrations. Look for lenses that mention these features for sharper images.
Quality glass ensures better contrast and fewer distortions.
Lens Coating
Coatings like SMC or SP reduce flare and repel dirt. They improve color accuracy and make cleaning easier.
Always prefer lenses with good anti reflection coatings.
Size and Weight
Lighter lenses are easier to carry for long periods. Compact designs suit travel better but may trade off some build quality.
Balance portability with durability for your needs.
Price and Value
Consider the total value rather than just the price. Renewed or used options can offer savings without sacrificing performance.
Determine your budget and prioritize optical quality over features.
How to Use and Care for Your K Mount Lenses for Pentax Camera
Always attach and detach lenses carefully to avoid damaging the mount. Keep the camera body covered when changing lenses to prevent dust from reaching the sensor.
Clean the front element gently with a microfiber cloth and lens cleaning fluid if needed. Avoid touching glass with fingers to prevent oil residue buildup.
Store your lenses in a dry place to prevent mold and corrosion. Using a padded case ensures they remain safe from bumps during transport.
Frequently Asked Questions
Are K Mount lenses compatible with all Pentax cameras?
Most K Mount lenses fit on modern Pentax DSLRs. However electronic lenses work best on newer bodies while manual ones need specific settings for proper use.
What is the difference between DA and FA lenses?
DA lenses are designed for crop sensor cameras while FA lenses work on full frame bodies. Both mount on the same system but cover different sensor sizes.
Can I use manual focus lenses on Pentax bodies?
Yes manual focus lenses work fine on Pentax cameras. You must focus manually but the camera metering can still assist in exposure decisions.
How do I clean a Pentax lens properly?
Use a blower to remove dust first then wipe with a microfiber cloth. Avoid paper towels which can scratch the lens coating surface.
Why choose a prime lens over a zoom?
Prime lenses often offer wider apertures and sharper images. They are also lighter and encourage better composition skills during shooting.
Do K Mount lenses have weather sealing?
Some high end K Mount lenses feature weather sealing. Always check the specs as many standard lenses are not sealed against moisture.
Final Thoughts on Choosing the Best K Mount Lenses for Pentax Camera
Our top picks highlight a range of options from budget friendly to premium choices. The Pentax SMC PENTAL-Da 35mm is our editor favorite for daily use.
Prioritize focal length and aperture based on your photography goals. Build quality and weather resistance are also vital for outdoor photographers.
Always check current prices and availability before purchasing. Availability may vary so confirm listings before you buy your next lens.