Andoer 50 mm F1.7 Wide Aperture Manual Focus
5.0Editor score
Wide aperture for low light
Manual focus prime lens
Full frame compatible
In this guide
Finding the right glass for your Pentax system is crucial for capturing sharp images. K Mount Lenses for Pentax Camera offer a wide variety of focal lengths and apertures to suit every photographer.
We evaluated ten distinct options based on optical performance, build quality, and user feedback. This list covers everything from budget-friendly primes to versatile zooms for diverse shooting scenarios.
Each pick highlights key features and real-world performance notes. Please note that availability and pricing can change frequently, 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
4.6Editor score
In-camera shake reduction compatible
Hybrid aspherical lens elements
Compact lightweight design
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL
4.5Editor score
Weather resistant construction
DC motor autofocus
75x zoom range
Top 10 Best K Mount Lenses for Pentax Camera in 2026 Compared
This table provides a side-by-side comparison of all ten selected lenses to help you quickly identify the right optical solution for your specific Pentax camera needs.
ProductsSpecificationsEditor scorePrice
Best Budget
Andoer 50mm F1.7
50mm focal length
F1.7 maximum aperture
Manual focus operation
PK Mount replacement
5.0Editor score
Editor's Choice
Pentax SMC PENTAL-Da 35mmF2.4AL
35mm equivalent focal length
F2.4 maximum aperture
Hybrid aspherical lens
Super protect coating
4.6Editor score
Best Premium
Tamron AF 70-300mm f/4.0-5.6 Di LD Macro
70-300mm zoom range
Macro zoom capability
Di LD construction
Model A17P
4.1Editor score
Pentax SMC 50mm F1.7 Manual Focus MF
50mm focal length
F1.7 maximum aperture
Manual focus lens
Renewed condition
3.0Editor score
Sigma 28-80mm F3.5-5.6 Aspherical Macro HF
28-80mm zoom range
F3.5-5.6 aperture
Aspherical lens elements
Pentax-AF mount
Pentax Asahi SMC M 1:2 2 50mm 50 mm
50mm focal length
F2.2 maximum aperture
SMC coating
PK Bajonett mount
5.0Editor score
Pentax SMC 50mm F/2.0 Lens Prime Portrait
50mm focal length
F/2.0 maximum aperture
Manual focus ring
Renewed condition
SMC Pentax-M 50mm F1.7 manual focus lens
50mm focal length
F1.7 maximum aperture
SMC Pentax-M
Manual focus lens
4.2Editor score
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL
18-135mm zoom range
Weather resistant design
DC motor autofocus
ED AL IF construction
4.5Editor score
K&F CONCEPT Rear Lens Cap & Body Cap Cover
Lens cap body cover
Hot shoe cover kit
Microfiber cloth included
High impact plastic
4.7Editor score
1. Pentax SMC PENTAL-Da 35mmF2.4AL – Best Overall K Mount Lens
Pentax SMC PENTAL-Da 35mmF2.4AL
35mm equivalent focal length
F2.4 maximum aperture
Hybrid aspherical elements
Super protect coating
This lens stands out as a premier choice for everyday photography on Pentax K Mount systems. With a rating of 4.6 stars, users praise its ability to deliver high delineation performance across the entire frame.
Pros
- Excellent sharpness edges to edges
- Very compact and light
- Super coating repels dust
- Great for low light
Cons
- Not weather sealed
- No image stabilization
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The hybrid aspherical lens design ensures sharp images with high contrast from minimum to maximum distances. This makes it ideal for shooting portraits or landscapes where edge quality matters.
While it lacks weather sealing, the Super Protect coating helps repel dust and water drops effectively. The lightweight design means you can carry it everywhere without fatigue.
For photographers seeking a versatile standard lens, this is a top recommendation. It balances optical quality with portability better than most competitors in this category.
Superior Optical Clarity
The aspherical elements minimize spherical aberration for stunning imaging performance even at wide apertures.
Ideal Everyday Companion
At just 124 grams, it is an easy-to-use standard lens for snapshots and travel photography alike.
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2. Andoer 50mm F1.7 – Best Budget K Mount Lens
Andoer 50mm F1.7
50mm focal length
F1.7 wide aperture
Manual focus ring
Full frame compatible
This lens offers an affordable entry point into prime photography for Pentax users. Boasting a perfect 5.0 rating in our data, it delivers exceptional value for those seeking a fast aperture.
Pros
- Great value for money
- Wide aperture for bokeh
- Full frame compatible
- Manual focus precision
Cons
- Plastic build feels light
- No electronic contacts
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The 50mm focal length is the classic human eye perspective, perfect for portraits and street photography. The F1.7 aperture allows for beautiful background blur and low light capability.
Because it is a manual focus lens, you gain creative control over your focus points. It fits PK Mount systems including the K-1 Mark II Full Frame Cameras seamlessly.
Budget-conscious photographers will appreciate this replacement lens option. It provides a solid optical experience without the high cost of branded alternatives.
Creative Manual Focus
Use the manual focus ring to precisely control sharpness in your creative compositions.
Wide Aperture Benefits
The large aperture enables shooting in lower light and creating dreamy depth of field effects.
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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 WR
DC motor autofocus
ED AL (IF) construction
This lens represents a premium all-in-one solution for Pentax DSLR shooters. It features a 75x zoom range ideal for a wide variety of shooting conditions from landscapes to portraits.
Pros
- Weather resistant construction
- Quiet DC motor AF
- Extended zoom range
- Sharp ED glass
Cons
- Heavier than primes
- Slower aperture range
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Weather resistant design handles damp conditions well thanks to PENTAX Super Protect coating. The DC motor supports quick and quiet autofocus operation during video or photo sessions.
While it is heavier than fixed primes, the versatility makes it a reliable travel companion. It offers sharp performance thanks to ED AL elements within its optical structure.
Travel photographers needing one lens for many scenarios should consider this model. It balances weather sealing with optical performance effectively.
Weather Sealing
Built to handle inclement conditions, this lens is ready for outdoor adventures in any weather.
Versatile Zoom
The extended range lets you capture wide shots and telephoto details without changing lenses.
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4. Tamron AF 70-300mm f/4.0-5.6 – Best Telephoto Zoom Option
Tamron AF 70-300mm f/4.0-5.6
70-300mm zoom range
Macro zoom feature
Di LD optics
F4.0-5.6 aperture
This telephoto zoom offers a long reach for Pentax users on a budget. The 70-300mm range allows you to capture distant subjects like wildlife or sports effectively.
Pros
- Affordable telephoto zoom
- Macro zoom capability
- Good reach for wildlife
- Lightweight build
Cons
- Min focus is 37.4 inches
- Slower at tele end
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It features macro zoom capability, allowing closer focus distances than typical telephotos. Minimum focus distance is as short as 37.4 inches for detailed shots.
The Di LD construction helps correct aberrations while keeping weight down. It is a practical choice for those needing extra reach without heavy glass.
Wildlife and sports photographers looking for value will find this lens useful. It provides substantial reach in a manageable package.
Telephoto Reach
Capture distant details with ease thanks to the impressive 300mm maximum focal length.
Macro Versatility
Use the macro zoom function to get closer to subjects for interesting perspective shots.
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5. Pentax SMC 50mm F1.7 (Renewed) – Best Classic Film Lens
Pentax SMC 50mm F1.7 (Renewed)
50mm film lens
F1.7 aperture
Manual focus
Renewed condition
This lens represents a classic option for Pentax K Mount users who love film aesthetics. It is a film lens that can be used on modern bodies with the right setup.
Pros
- Classic optics look
- Affordable option
- Metal construction
- Full frame coverage
Cons
- Older optics design
- Condition varies
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The manual focus design provides a tactile shooting experience that many photographers enjoy. The F1.7 aperture is bright enough for indoor and low light portraits.
Since it is a renewed item, the condition can vary between units. It offers a cost-effective way to try vintage glass on your DSLR camera.
Vintage lovers and budget shooters might enjoy the unique rendering of this lens. It brings old world charm to digital photography.
Film Era Glass
Experience the character of older optics that render images with a unique vintage style.
Tactile Manual Focus
Focus manually with a smooth ring that offers a satisfying shooting experience.
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6. Sigma 28-80mm F3.5-5.6 – Best General Purpose Zoom
Sigma 28-80mm F3.5-5.6
28-80mm zoom range
F3.5-5.6 aperture
Aspherical lens elements
Pentax-AF mount
This lens offers a versatile range covering wide angle to short telephoto. It is designed for Pentax-AF cameras and supports autofocus functionality.
Pros
- Wide to telephoto range
- Aspherical elements
- Auto focus support
- Compact design
Cons
- Older lens model
- Rating not specified
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The inclusion of aspherical elements helps improve image quality and reduce aberrations. This makes it suitable for general photography and snapshots.
The 28-80mm range is ideal for everyday shooting where you do not want to change lenses often. It balances portability with focal length versatility.
Photographers seeking a basic all-rounder for their Pentax system may find this useful. It provides a solid starting point for varied shooting situations.
Wide to Tele Range
Cover everything from sweeping landscapes to tighter portraits with one easy lens.
Aspherical Quality
Aspherical glass ensures better clarity and sharpness in your everyday photos.
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7. Pentax Asahi SMC M 50mm 2.2 – Best Vintage M Series
Pentax Asahi SMC M 50mm 2.2
50mm focal length
F2.2 aperture
SMC coating
PK Bajonett mount
This lens belongs to the classic M Series line with a strong reputation for quality. The 5.0 rating reflects the high regard users have for its optical performance.
Pros
- Excellent optical quality
- Vintage aesthetic
- Full manual control
- Good build quality
Cons
- Manual focus only
- Older mount
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The F2.2 aperture provides decent low light capability for a vintage lens. SMC coating ensures reduced flare and good contrast in your images.
The PK Bajonett mount ensures compatibility with various Pentax bodies. It is a sturdy lens designed for manual focusing enthusiasts.
Those who enjoy the craft of manual focus will appreciate this lens. It delivers sharp results with a classic look and feel.
Classic SMC Coating
Multi-coated glass reduces flare for better contrast in bright sunlight.
Precision Manual Focus
Focus manually with a smooth ring designed for critical accuracy.
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8. Pentax SMC 50mm F/2.0 – Best Portrait Prime Option
Pentax SMC 50mm F/2.0
50mm portrait focal
F/2.0 aperture
Metal mount
Renewed condition
This prime lens is designed specifically for portrait work on Pentax K Mount cameras. It features a bright F/2.0 aperture for beautiful bokeh in your subjects.
Pros
- Ideal for portraits
- Bright aperture
- Durable construction
- Natural perspective
Cons
- Renewed condition
- Manual focus only
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Optical excellence ensures crystal-clear images with vibrant colors. The smooth manual focus ring gives you precise control over your shots.
Constructed with a metal mount, this lens is built to last. It offers reliable performance in various shooting conditions including low light.
Portrait photographers looking for a natural perspective should consider this option. It provides a solid balance of quality and value.
Portrait Performance
The 50mm focal length offers a flattering perspective for headshots and full body portraits.
Creative Bokeh
The wide aperture allows for shallow depth of field to isolate your subjects.
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9. SMC Pentax-M 50mm F1.7 – Best Classic Prime Lens
SMC Pentax-M 50mm F1.7
50mm focal length
F1.7 maximum aperture
SMC Pentax-M
Manual focus lens
This lens is a staple of the Pentax manual focus era. The F1.7 aperture makes it capable of excellent low light photography compared to kit lenses.
Pros
- Iconic Pentax glass
- Bright F1.7
- Good sharpness
- Compact size
Cons
- Older design
- Manual focus
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Sharpness is a hallmark of this classic design. It renders images with a distinct character that many photographers still seek today.
The manual focus operation requires care but rewards you with precise control. It is a lightweight option that is easy to carry around.
Fans of manual focus photography will find great value here. It combines optical quality with a vintage experience at a reasonable cost.
Optical Legacy
Enjoy the legendary image quality that Pentax M Series lenses are known for.
Compact Carry
The small footprint makes it an easy lens to keep on your camera at all times.
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10. K&F CONCEPT Rear Lens Cap Kit – Best Lens Protection Kit
K&F CONCEPT Rear Lens Cap & Body Cap Cover
Lens cap body cover
Hot shoe cover kit
Microfiber cloth
High impact plastic
While not a lens itself, this kit is essential for protecting your K Mount gear. It includes body covers and rear lens caps to prevent dust and debris from entering.
Pros
- Protects lens and sensor
- Includes cleaning cloth
- Fits Pentax K Mount
- Durable covers
Cons
- Accessories not lens
- Basic protection
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The high impact plastic construction provides tough resistance to drops. It offers excellent physical protection for the lens and sensor during storage.
Hot shoe protectors ensure the camera interface remains free from debris and moisture. The kit includes a microfiber cloth for cleaning your optics.
Photographers wanting to protect their investment should have this kit. It is an affordable way to maintain your equipment properly.
Complete Protection
Protect your camera body and lens mounts from dust and scratches with these covers.
Easy Installation
The bayonet rotation design ensures the caps install and remove quickly and securely.
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Buying Guide – How to Choose the Best K Mount Lenses for Pentax Camera
Selecting the right lens involves weighing several factors to match your photography style and camera body.
Focal Length
The focal length determines how much of the scene your lens captures. A 50mm lens is considered a standard view while wider angles like 18mm capture more landscape.
Choose a focal length that matches the type of photos you shoot most often.
Aperture
Aperture controls how much light enters the lens and affects depth of field. Lenses with lower numbers like F1.7 allow more light for low light shooting.
Prioritize wide apertures if you plan to shoot portraits or in dark environments.
Manual vs Autofocus
Modern lenses often support autofocus for speed. However, manual focus lenses offer precision for controlled shots like macro work.
Decide based on whether you prefer the speed of automation or the control of manual adjustment.
Optical Construction
Look for features like aspherical elements or ED glass that improve image quality. These reduce aberrations and improve contrast in your photos.
Higher optical construction usually means sharper images but often costs more.
Weather Resistance
Some lenses have weather sealing to protect against dust and water. This is vital if you shoot in outdoor or harsh environments.
Ensure your camera and lens are matched for weather sealing if you plan to shoot in rain.
Build Quality
Metal mounts and sturdy bodies ensure durability over time. Plastic bodies are lighter but may feel less robust in hand.
Check build materials to ensure the lens can withstand regular handling.
Price and Value
Prices vary widely depending on brand and features. Newer optics may cost more but offer better technology.
Consider value by balancing performance with what you can afford.
Kit Compatibility
Ensure the lens mount matches your specific Pentax K Mount camera. Some lenses may require adapters for older bodies.
Always verify compatibility before purchasing to avoid fit issues.
How to Use and Care for Your K Mount Lenses for Pentax Camera
Always attach the rear cap when not in use to protect the inner glass from dust. This simple step keeps your lens clean longer.
Use a microfiber cloth to clean fingerprints gently. Never use harsh chemicals that might damage the coatings.
Store lenses in a dry place to avoid moisture damage. Consider silica gel packs to keep humidity low.
Frequently Asked Questions
Are K Mount Lenses compatible with all Pentax cameras?
Most K Mount lenses work with Pentax K Mount DSLRs and mirrorless cameras. However, very old lenses may need an adapter for autofocus. Check specific mount details.
Can I use Pentax lenses on other brands?
You can use adapters to mount Pentax lenses on other systems like Sony or Nikon. Autofocus might be limited or unavailable with these adapters.
What is the benefit of manual focus lenses?
Manual focus lenses allow precise control for macro or architectural shots. They are also often lighter and simpler than autofocus designs.
How do I protect my lens from dust?
Use front and rear caps when the lens is not mounted on a camera. Store gear in a sealed bag with silica gel for best protection.
What aperture is best for portraits?
Wide apertures like F2.8 or lower allow for beautiful background blur. They also help isolate the subject from the environment.
Are newer lenses better than older ones?
Newer lenses often have improved coatings and autofocus tech. Older lenses can still produce excellent results with classic looks.
Final Thoughts on Choosing the Best K Mount Lenses for Pentax Camera
This guide highlights top options ranging from vintage primes to modern zooms. Each lens offers unique strengths for different photography needs.
Prioritize aperture and focal length based on what you shoot most. A versatile zoom works well for general use while primes excel for detail.
Check current availability and conditions before buying especially for renewed items. Prices and stock can change so verify online details.