Andoer 50 mm F1.7
5.0Editor score
Manual Focus Prime Lens
Wide Aperture Design
Affordable Price Point
In this guide
Choosing the right glass for your camera is essential for capturing stunning images. Whether you shoot portraits or landscapes, a quality lens transforms your work significantly.
This guide compares ten distinct K Mount lenses designed for Pentax cameras. We evaluate build quality optical performance and user feedback to help you decide.
Each pick highlights specific strengths and ideal use cases for different photographers. Prices vary based on condition and availability so check current listings before buying.
Top 3 Picks for Best K Mount Lenses for Pentax Camera
Pentax SMC PENTAX-DA 35mmF2.4AL
4.6Editor score
Aspherical Lens Construction
Super Protect Coating
Compact Lightweight Body
Pentax 21977 DA 18-135mm
4.5Editor score
Weather Resistant Design
Extended Zoom Range
DC Motor Autofocus
Top 10 Best K Mount Lenses for Pentax Camera in 2026 Compared
The following table provides a side-by-side comparison of all ten selected lenses. It highlights key specifications and distinct features to aid quick decision-making for your specific needs.
ProductsSpecificationsEditor scorePrice
Best Budget
Andoer 50 mm F1.7
50mm Focal Length
F1.7 Max Aperture
Manual Focus Only
PK Mount Compatible
5.0Editor score
Editor's Choice
Pentax SMC PENTAX-DA 35mmF2.4AL
35mm Equivalent Focal
F2.4 Max Aperture
Aspherical Lens Element
Super Protect Coating
4.6Editor score
Best Premium
Tamron AF 70-300mm f/4.0-5.6
70-300mm Zoom Range
F4.0-5.6 Aperture
Macro Capabilities
LD Lens Construction
Pentax SMC 50mm F1.7
50mm Focal Length
F1.7 Max Aperture
Manual Focus Ring
Renewed Condition
3.0Editor score
Sigma 28-80mm F3.5-5.6
28-80mm Zoom Range
F3.5-5.6 Aperture
Aspherical Elements
Macro Functionality
Pentax Asahi SMC M 50mm 1:2.5
50mm Focal Length
F2.5 Max Aperture
Classic Manual Focus
Vintage Build Quality
5.0Editor score
Pentax SMC 50mm F/2.0
50mm Focal Length
F2.0 Max Aperture
Metal Mount Body
Renewed Condition
SMC Pentax-M 50mm F1.7
50mm Focal Length
F1.7 Max Aperture
Manual Focus Only
Classic SMC Coating
4.2Editor score
Pentax 21977 DA 18-135mm
18-135mm Zoom Range
F3.5-5.6 Aperture
Weather Resistant
DC Motor AF
4.5Editor score
K&F CONCEPT Lens Cap Kit
Body Cap Included
Rear Lens Caps
Hot Shoe Covers
Microfiber Cloth
4.7Editor score
1. Andoer 50 mm F1.7 – Best Budget Prime
Andoer 50 mm F1.7
F1.7 Max Aperture
50mm Focal Length
Manual Focus Ring
PK Mount System
The Andoer 50 mm F1.7 offers an accessible entry point for Pentax shooters seeking prime lens benefits. With a perfect 5.0 rating, it delivers solid optical performance at a fraction of the cost of branded alternatives.
Pros
- Affordable entry price
- Large aperture for low light
- Simple manual operation
- Compatible with full frame
- Lightweight design
Cons
- No autofocus motor
- Basic build quality
- Manual only for focus
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Its wide F1.7 aperture allows for significant background blur and excellent performance in low light conditions. The manual focus ring provides tactile control for precise shooting, which is ideal for studio or portrait work where speed is secondary to accuracy.
The lack of autofocus may limit its use for fast moving subjects like sports or wildlife. However, for static subjects or controlled environments, the manual operation is not only acceptable but often preferred by creative photographers.
Budget conscious photographers will find this lens a valuable addition to their kit. It serves well as a secondary prime or a first manual lens for those learning depth of field control without financial risk.
Low Light Performance
The F1.7 aperture lets in ample light for indoor shooting without needing flash or high ISO settings.
Tactile Control
Manual focus gives you complete creative control over the focal plane for artistic compositions.
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2. Pentax SMC PENTAX-DA 35mmF2.4AL – Best All Rounder
Pentax SMC PENTAX-DA 35mmF2.4AL
35mm Equivalent Focal
F2.4 Max Aperture
Aspherical Lens
SP Coating
The Pentax SMC PENTAX-DA 35mmF2.4AL stands out as an exceptional standard lens for daily shooting. With its 4.6 rating, it combines high delineation performance with a compact design that fits easily into any travel bag.
Pros
- Sharp edges to edges
- Compact and lightweight
- Dust and water resistant
- Great bokeh quality
- Reliable brand
Cons
- Slower aperture than f1.7
- No weather sealing on body
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Hybrid aspherical lenses correct aberrations effectively ensuring sharp images from minimum to maximum distances. The F2.4 aperture offers high brightness for easy visibility in the viewfinder and allows for beautiful background separation in portraits.
The Super Protect Coating helps repel dust and water drops making cleaning easier in harsh environments. While it lacks the extreme brightness of wider apertures, its optical quality and portability make it a reliable companion for many scenarios.
Ideal for snapshots landscapes and portraits this lens excels in versatility. It is highly recommended for beginners looking for a high quality first prime that grows with your skills over time.
Optical Clarity
High delineation performance ensures sharp resolution across the entire frame for detailed images.
Portability
Weighing only 124g it is easy to carry for long days of shooting without fatigue.
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3. Pentax 21977 DA 18-135mm – Best Premium Zoom
Pentax 21977 DA 18-135mm
18-135mm Zoom Range
F3.5-5.6 Aperture
Weather Resistant
DC Motor
The Pentax 21977 DA 18-135mm is a premium zoom lens designed for versatility and durability. Its 4.5 rating reflects strong performance across a wide range of shooting conditions from landscapes to distant wildlife.
Pros
- Wide zoom range
- Weather resistant design
- Quick quiet autofocus
- Compact and portable
- SP Coating protection
Cons
- Slower aperture at telephoto
- Higher price point
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With an extended 75x zoom range this lens handles diverse subjects without needing to swap glass. The Direct Current motor ensures quick and quiet autofocus operation which is vital for events and video work.
Weather resistance allows you to shoot confidently in damp or inclement conditions. The Super Protect Coating further aids maintenance by repelling dust and water keeping the lens clean and clear over time.
Photographers seeking a high quality walkaround lens will appreciate this model. It balances optical quality build strength and convenience making it a top choice for dedicated Pentax users who need reliability.
Weather Durability
Designed to handle damp conditions this lens ensures you can shoot outdoors regardless of minor weather changes.
Versatility
The zoom range covers wide angles and telephoto needs reducing the need for multiple lenses during travel.
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4. Pentax SMC 50mm F1.7 – Classic Manual
Pentax SMC 50mm F1.7
50mm Focal Length
F1.7 Max Aperture
Manual Focus Only
Renewed Condition
This renewed Pentax SMC 50mm F1.7 offers a chance to own a classic lens at an accessible price. With a rating of 3.0 it provides solid value for those who appreciate vintage optics and manual control.
Pros
- Classic optical design
- Affordable renewed price
- Metal mount durability
- Smooth focus ring
- Good bokeh
Cons
- No autofocus
- Variable condition on renewed
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The lens features a reliable metal mount and smooth focus ring that feels great in hand. Its F1.7 aperture delivers excellent low light performance and pleasing background blur suitable for portraits and street photography.
Buying renewed means the condition may vary so inspecting the lens upon arrival is recommended. The lack of autofocus limits its utility for fast action but suits static subjects well enough for most hobbyists.
Ideal for photographers who enjoy the process of manual focusing this lens brings a tactile experience back to modern shooting. It is a great addition for collectors or beginners learning the fundamentals of exposure.
Classic Optics
Vintage designs often provide unique character and color rendition that modern lenses cannot replicate.
Value
Renewed options provide access to high quality glass at a fraction of the cost of new items.
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5. Sigma 28-80mm F3.5-5.6 – Versatile Zoom
Sigma 28-80mm F3.5-5.6
28-80mm Zoom Range
F3.5-5.6 Aperture
Aspherical Elements
Macro Capability
The Sigma 28-80mm F3.5-5.6 is a versatile zoom lens designed for general photography tasks. Although ratings are unavailable it offers a practical range for travel and everyday shooting at a budget friendly price.
Pros
- Wide zoom range
- Aspherical lens elements
- Macro functionality
- Affordable price
- Lightweight build
Cons
- Older model
- No modern coatings
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Aspherical lens elements help correct distortion and aberrations providing sharp images across the frame. The macro capability allows for close up photography adding another dimension to your creative possibilities without extra gear.
Its lightweight build makes it easy to carry around for extended periods. The older design may lack modern coatings but it still delivers decent performance for casual and entry level photography needs.
This lens is best suited for beginners or those needing a secondary zoom. It provides solid value for its price range making it a reasonable choice for those starting out with Pentax K Mount systems.
Macro Capability
Close up focusing allows you to capture small details with clarity for unique perspectives.
Zoom Range
The 28 to 80mm range covers wide angles and short telephoto needs for various scenes.
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6. Pentax Asahi SMC M 50mm – Vintage Classic
Pentax Asahi SMC M 50mm 1:2.5
50mm Focal Length
F2.5 Max Aperture
Manual Focus
Vintage Build
The Pentax Asahi SMC M 50mm is a vintage lens noted for its excellent condition and functionality. With a perfect 5.0 rating it represents a classic option for photographers who value traditional build quality and handling.
Pros
- Excellent condition
- Smooth manual operation
- Classic look
- Compact size
- Strong glass
Cons
- Manual focus only
- Older coating
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The smooth manual focus ring allows for precise adjustments during shooting. Its compact size and solid metal construction make it durable and comfortable to use for extended sessions without fatigue.
While older coatings may not perform as well as modern ones in extreme glare situations the overall optical quality remains impressive. It offers a unique character that many film enthusiasts appreciate in digital workflows.
Ideal for hobbyists and collectors this lens provides a tactile shooting experience. It is highly recommended for those seeking a reliable manual prime that maintains high functionality and aesthetic appeal.
Tactile Experience
Manual operation encourages slower and more deliberate composition which can improve image quality.
Durability
All metal construction ensures the lens withstands daily use and travel without damage.
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7. Pentax SMC 50mm F/2.0 – Portrait Prime
Pentax SMC 50mm F/2.0
50mm Focal Length
F2.0 Max Aperture
Manual Focus
Metal Mount
The Pentax SMC 50mm F/2.0 lens offers crystal clear images and vibrant colors ideal for portraits. With a renewed condition it provides access to high quality optics at a lower price point than buying new.
Pros
- Excellent optics
- Vibrant color rendering
- Natural perspective
- Shallow depth of field
- Reliable construction
Cons
- No autofocus
- Renewed condition varies
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Its fixed focal length offers a natural perspective that feels comfortable for everyday use and street photography. The smooth manual focus ring gives you precise control over the focus point for creative shots.
The bright F2.0 aperture allows for shallow depth of field and beautiful bokeh effects in low light. Metal mount and high-quality optics ensure durability and performance in various shooting environments.
Photographers seeking a prime lens for portraits will appreciate its capabilities. It is a great choice for those who value optical excellence and manual control in their workflow without the premium cost.
Portrait Quality
The 50mm focal length provides flattering proportions for human subjects in portraits.
Manual Precision
Focus rings allow you to adjust focus precisely for artistic control over the image.
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8. SMC Pentax-M 50mm F1.7 – Reliable Manual
SMC Pentax-M 50mm F1.7
50mm Focal Length
F1.7 Max Aperture
Manual Focus
Classic SMC
The SMC Pentax-M 50mm F1.7 is a classic lens praised for its reliability and optical performance. With a strong 4.2 rating it offers a dependable option for photographers who appreciate traditional manual focusing.
Pros
- Reliable performance
- Classic SMC coating
- Smooth focus ring
- Great value
- Compact design
Cons
- No autofocus
- Older design
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Its SMC coating helps reduce glare and improve contrast in various lighting conditions. The smooth focus ring provides a pleasant tactile feel which enhances the overall shooting experience significantly.
While it lacks modern autofocus features the optical quality remains competitive for many uses. This lens is best suited for static subjects or creative work where manual control is preferred over speed.
Photographers looking for a budget friendly prime with excellent build quality will find this lens ideal. It serves well as a secondary option or a primary lens for those learning manual focusing techniques.
Coating Quality
Super Multi Coating reduces flare and ghosting ensuring clearer images in challenging light.
Focus Feel
The manual ring design is smooth and consistent allowing for precise adjustments during shooting.
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9. Andoer 50 mm F1.7 – Alternative Prime
Andoer 50 mm F1.7
50mm Focal Length
F1.7 Max Aperture
Manual Focus
PK Mount
The Andoer 50 mm F1.7 provides an accessible entry into prime lens photography for Pentax users. With a perfect 5.0 rating it delivers solid performance and optical quality that rivals more expensive branded options.
Pros
- Affordable price
- Wide aperture
- Simple operation
- Full frame compatible
- Lightweight
Cons
- Manual focus only
- Basic build
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Its wide F1.7 aperture is great for low light shooting and creating pleasing background blur. The manual focus ring is straightforward and provides adequate control for most static or controlled shooting scenarios.
The build quality is basic but sufficient for casual use. It is lightweight and easy to carry making it a practical choice for travel or situations where minimizing gear weight is important.
Budget conscious photographers will appreciate the value this lens offers. It is highly recommended for beginners or as a secondary lens for those who prioritize aperture and focal length over advanced features.
Low Light
The wide aperture allows for faster shutter speeds in dim conditions without increasing ISO.
Simplicity
With no electronics the lens is simple to use and easy to maintain for years.
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10. K&F CONCEPT Rear Lens Cap Kit – Essential Accessory
K&F CONCEPT Rear Lens Cap Kit
Body Cover Included
Rear Lens Caps
Hot Shoe Covers
Microfiber Cloth
The K&F CONCEPT Rear Lens Cap Kit offers essential protection for Pentax K Mount cameras and lenses. With a high 4.7 rating it ensures your gear remains safe from dust moisture and debris during storage or transport.
Pros
- Complete protection set
- High impact plastic
- Quick install
- Dust resistant
- Includes cleaning cloth
Cons
- Accessory only
- Does not focus
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The kit includes body covers rear lens caps and hot shoe covers designed for quick installation. High impact plastic construction provides durable physical protection against drops and minor impacts in your camera bag.
Included microfiber cloth allows for quick cleaning of surfaces when needed. The tight fit prevents fine particles from entering the lens mount ensuring long term sensor and mechanical integrity.
Photographers who frequently change lenses or travel with their gear will find this kit invaluable. It provides peace of mind and extends the lifespan of your camera and lenses significantly.
Complete Protection
Covers for body and lenses ensure all exposed surfaces remain free from dust and moisture.
Quick Install
Bayonet rotation design allows for easy attachment and removal without tools or effort.
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Buying Guide – How to Choose the Best K Mount Lenses for Pentax Camera
Selecting the right lens requires understanding your shooting style and priorities. This guide covers key factors to consider before making a purchase.
Focal Length
Focal length determines the field of view and magnification of your images. Prime lenses offer fixed lengths while zooms provide flexibility. Consider what subjects you shoot most often.
For portraits choose 50mm to 85mm equivalents. For landscapes try 18mm to 35mm. Zooms like 18-135mm cover a wide range for general use.
Aperture Size
Aperture controls light intake and depth of field. Wider apertures like F1.7 allow more light and background blur. Narrower apertures like F5.6 are better for depth in landscapes.
Choose F1.7 to F2.8 for low light and portraits. Select F4 to F5.6 for landscapes and general photography where maximum sharpness is needed.
Manual vs Autofocus
Autofocus lenses simplify capturing moving subjects. Manual focus lenses offer precise control and often have better build quality. Consider your shooting speed and subject type.
Choose autofocus for events and wildlife. Select manual for portraits and controlled environments where precision is more important than speed.
Build Quality
Metal mounts and weather sealing increase durability. Plastic bodies may be lighter but less robust. Check if the lens is splash resistant for outdoor use.
Select metal mounts and sealed designs for professional or outdoor work. Plastic builds suffice for casual indoor or studio photography.
Optical Elements
Aspherical and ED elements reduce aberrations and chromatic issues. More glass elements generally mean sharper images. Check for coatings that resist flare.
Look for lenses with aspherical elements and Super Protect Coating for best clarity and durability against dust and moisture.
Weight and Size
Larger lenses are often sharper but harder to carry. Smaller lenses are portable but may lack speed. Consider how much you travel with your gear.
Choose lightweight options for travel. Larger lenses work well for studio or fixed location shoots where portability is less critical.
Condition and Price
New lenses offer warranties but cost more. Renewed or vintage options save money but vary in condition. Inspect glass and focus rings carefully.
Buy new for warranty protection. Choose renewed or vintage for budget friendly options but inspect optics for scratches before buying.
Compatibility
Ensure the lens mount matches your Pentax camera body. Full frame lenses work on APS-C bodies but with crop factors. Check specific model compatibility lists.
Verify that the PK Mount or DA designation suits your camera. Full frame compatibility ensures maximum flexibility for future upgrades.
How to Use and Care for Your K Mount Lenses for Pentax Camera
Attach the lens by aligning the markers and rotating until it clicks securely. Ensure caps are removed before shooting to avoid blurry images or sensor damage.
Clean the front element gently with a soft brush or microfiber cloth. Avoid touching the glass with fingers to prevent oils and scratches on the surface.
Store lenses in a dry place with caps on both front and rear. Use silica gel packs to control humidity and prevent mold growth inside the lens.
Frequently Asked Questions
Are K Mount lenses compatible with all Pentax cameras?
Most K Mount lenses work with Pentax DSLRs but older manual lenses may lack autofocus. Check your camera model for compatibility with specific lens types before purchasing.
What is the difference between DA and FA lenses?
DA lenses are optimized for APS-C sensors while FA lenses work on full frame and crop bodies. Choose based on your camera body type for best performance.
Do these lenses support weather resistance?
Only specific models like the DA 18-135mm offer weather resistance. Standard lenses may not seal out dust and moisture so use caution in bad weather.
Can I use third party lenses on Pentax?
Yes brands like Sigma and Tamron make K Mount lenses for Pentax. Ensure they support your camera's autofocus and sensor type before buying.
How do I clean the lens properly?
Use a soft brush to remove dust then a microfiber cloth for smudges. Avoid harsh chemicals and never wipe dry glass without lubrication to prevent scratches.
What is the best lens for portraits?
The 50mm F1.7 or 35mm F2.4 lenses are excellent for portraits. Their focal lengths and apertures provide flattering perspective and nice background blur.
Are renewed lenses worth buying?
Renewed lenses can be great value if inspected carefully. Look for clear glass and smooth focus rings to ensure performance matches new options.
Do I need a lens hood?
A lens hood reduces flare and protects the front element. It is especially useful in bright conditions or when shooting towards light sources.
Final Thoughts on Choosing the Best K Mount Lenses for Pentax Camera
We reviewed ten distinct K Mount lenses offering choices for every budget and shooting style. From budget primes to premium zooms there is a lens for every photographer.
Prioritize focal length and aperture based on your most common subjects. If versatility is key a zoom like the DA 18-135mm covers most needs without gear changes.
Prices and availability change frequently so check current listings before buying. Investing in the right glass will elevate your photography and enjoyment significantly.