Andoer 50 mm F1.7 Wide Aperture Manual Focus Camera Lens
5.0Editor score
Large aperture manual focus
Prime lens design
Full frame compatible
In this guide
Choosing the right lens is crucial for Pentax users seeking optimal image quality and performance. The K Mount system offers a wide range of options for various photography styles and preferences.
We evaluated ten top-rated lenses based on optical quality, build durability, and user feedback. Our analysis focuses on key features that matter most to real-world shooters.
Each pick highlights specific strengths and ideal use cases for different photographers. Please note that product availability and pricing may vary over time across retailers.
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
In-camera shake reduction compatible
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR Lens
4.5Editor score
Weather resistant design
Extended zoom range
Direct current motor
Top 10 Best K Mount Lenses for Pentax Camera in 2026 Compared
The following comparison table provides a side-by-side overview of all ten products featured in this guide. Each entry includes key specifications and direct links to product pages for easy reference.
ProductsSpecificationsEditor scorePrice
Best Budget
Andoer 50mm F1.7
50mm focal length
F1.7 maximum aperture
Manual focus only
PK Mount compatible
5.0Editor score
Editor's Choice
Pentax SMC PENTAL-Da 35mmF2.4AL
35mm equivalent focal length
F2.4 maximum aperture
Aspherical lens design
Super protect coating
4.6Editor score
Best Premium
Tamron AF 70-300mm f/4.0-5.6 Di LD Macro
70-300mm zoom range
Telephoto zoom lens
Macro capabilities
LD glass elements
4.1Editor score
Pentax SMC 50mm F1.7 Manual Focus (Renewed)
50mm focal length
F1.7 maximum aperture
Manual focus design
Renewed condition
3.0Editor score
Sigma 28-80mm F3.5-5.6 Aspherical Macro HF
28-80mm zoom range
Aspherical lens design
Macro functionality
HF motor system
4.7Editor score
Pentax Asahi SMC M 1:2 50mm 50 mm
50mm focal length
F2 maximum aperture
Manual focus lens
PK Bajonett mount
5.0Editor score
Pentax SMC 50mm F/2.0 Lens Prime Portrait
50mm focal length
F2 maximum aperture
Prime lens design
Manual focus control
4.2Editor score
SMC Pentax-M 50mm F1.7 manual focus lens
50mm focal length
F1.7 maximum aperture
Manual focus operation
SMC coating
5.0Editor score
Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR
18-135mm zoom range
Weather resistant
DC motor autofocus
ED AL lens elements
4.5Editor score
K&F CONCEPT Rear Lens Cap & Body Cap Cover Kit
Includes lens caps
Includes body caps
Includes hot shoe cover
Pentax K Mount compatible
4.7Editor score
1. Pentax SMC PENTAL-Da 35mmF2.4AL – Best Overall Standard Lens
Pentax SMC PENTAL-Da 35mmF2.4AL
Compact lightweight design
High delineation performance
F2.4 maximum aperture
Super protect coating
The Pentax SMC PENTAL-Da 35mmF2.4AL is a standout standard lens for Pentax K series cameras. It offers a versatile 53.5mm equivalent focal length with high delineation performance that ensures sharp images from edge to edge. Users appreciate its compact design and effective protective coatings.
Pros
- Very lightweight and portable
- Excellent edge to edge sharpness
- Effective in-camera shake reduction
- Super coating resists dust and water
- Ideal for everyday snapshots
Cons
- F2.4 aperture limits low light use
- No autofocus support
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This lens leverages hybrid aspherical elements to correct various aberrations while maintaining a lightweight profile at only 124 grams. The F2.4 aperture provides bright visibility in the viewfinder and helps achieve creative background blurring for portraits. Its super protect coating ensures durability against dust and water drops.
While the F2.4 aperture is bright enough for many situations, it may struggle in very low light without support or higher ISO settings. The lack of autofocus requires manual focus adjustments which some users find limiting for fast moving subjects. These trade-offs are acceptable for its intended use as a lightweight standard lens.
This lens is perfect for photographers seeking a lightweight prime for landscapes, street photography, and portraits. It is especially recommended for those who prioritize portability and image quality over speed. If you value a compact form factor and reliable build quality this lens delivers excellent value.
Optical Excellence and Sharpness
Hybrid aspherical lenses minimize aberrations ensuring high contrast and sharp resolution even at the edges of the image.
Durability and Protection
Super protect coating uses fluorine treatment to repel dust water and grease keeping the lens clean in various environments.
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2. Andoer 50mm F1.7 – Best Budget Prime Lens
Andoer 50mm F1.7 Manual Focus
50mm focal length
F1.7 maximum aperture
Manual focus only
PK Mount compatible
The Andoer 50mm F1.7 is an affordable manual focus prime lens designed for Pentax K Mount cameras including the K1 and K1 Mark II. Its large F1.7 aperture allows for excellent low light performance and shallow depth of field effects. Photographers value it for its budget friendly pricing and full frame compatibility.
Pros
- Affordable price point
- Bright F1.7 aperture
- Full frame compatible
- Manual focus precision
- Compact prime design
Cons
- Manual focus only
- Build quality varies
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This lens offers a classic 50mm focal length which provides a natural perspective ideal for portraits and street photography. The wide aperture enables creative control over focus and background blur. While it requires manual focus this can be beneficial for those seeking precise control over their images.
Manual focus requires more time and patience which may not suit fast paced shooting scenarios. The build quality is functional but lacks the premium feel of more expensive options. These limitations are minor considering the competitive price and optical performance offered.
This lens is ideal for budget conscious photographers or those new to prime lenses seeking an accessible entry point. It is recommended for portrait and low light shooters who do not need autofocus. If you want a simple effective lens without a high price tag this is a strong choice.
Full Frame Versatility
Designed to work seamlessly with Pentax K1 and K1 Mark II full frame cameras offering a true 50mm field of view.
Creative Aperture Control
F1.7 aperture provides bright performance in low light and allows for shallow depth of field creative effects.
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3. Pentax DA 18-135mm WR – Best Premium Travel Lens
Pentax DA 18-135mm WR
18-135mm zoom range
Weather resistant design
DC motor autofocus
ED AL lens elements
The Pentax 21977 DA 18-135mm lens is a versatile premium option offering an extended zoom range ideal for diverse shooting conditions. Its weather resistant build ensures reliability in damp or inclement environments. Photographers appreciate the compact design and quick DC motor autofocus for seamless operation.
Pros
- Extended 7.5x zoom range
- Weather resistant construction
- Quick quiet autofocus
- Compact and lightweight
- SP coating for easy cleaning
Cons
- F3.5-5.6 aperture limits low light
- Higher price point
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This lens covers a wide focal range from wide angle to telephoto making it a practical all-in-one solution. The ED AL elements help maintain sharpness and reduce aberrations across the zoom range. Super protect coating repels dust and water making maintenance straightforward in tough conditions.
The variable aperture of F3.5-5.6 may not be bright enough for very low light situations without additional support. The price is higher than standard zooms which may deter budget focused buyers. These trade-offs are acceptable given the robust build and versatile focal range offered.
This lens is perfect for travel photographers who want one lens to handle multiple scenarios without compromising on quality. It is highly recommended for outdoor shooters who need weather protection and a broad zoom range. If versatility and durability are your priorities this lens is a top contender.
Versatile Zoom Range
18-135mm zoom provides flexibility from wide landscape shots to close up portraits in a single lens.
Weather Resistant Reliability
Built to handle damp and inclement conditions ensuring consistent performance in challenging environments.
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4. Tamron AF 70-300mm Macro – Best Telephoto Zoom
Tamron AF 70-300mm Macro
70-300mm zoom range
Telephoto zoom lens
Macro capabilities
LD glass elements
The Tamron AF 70-300mm lens provides significant telephoto reach for capturing distant subjects with ease. Its macro capabilities allow for close up photography in addition to distant shots. LD glass elements ensure clear and sharp images across the zoom range for diverse subjects.
Pros
- Long telephoto reach
- Macro photography support
- LD glass for clarity
- Close minimum focus distance
- Affordable telephoto option
Cons
- F4-5.6 aperture is modest
- Autofocus can be slow
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This lens offers a minimum focus distance of 37.4 inches enabling detailed close ups of flowers or insects. The extended reach is valuable for wildlife or sports photography where proximity is limited. It is a budget friendly option for those needing long focal lengths.
The F4-5.6 aperture may struggle in low light requiring higher ISO or slower shutter speeds. Autofocus speed is not the fastest which could impact capturing fast action. These limitations are standard for telephoto zooms in this price category.
This lens is ideal for photographers seeking telephoto versatility without a high cost. It is recommended for hobbyists interested in wildlife or macro work. If you need reach and macro ability in a single lens this is a solid choice.
Extended Telephoto Reach
70-300mm zoom range allows for capturing distant subjects like wildlife or sports with clarity.
Macro Capabilities
Close focus distance enables detailed macro photography adding versatility to the lens.
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5. Pentax SMC 50mm F1.7 – Best Renewed Classic
Pentax SMC 50mm F1.7 (Renewed)
50mm focal length
F1.7 maximum aperture
Manual focus design
Renewed condition
The Pentax SMC 50mm F1.7 renewed option offers a classic manual focus prime lens at an accessible price. It retains the optical qualities of the original design with a bright aperture for creative control. This lens is suited for photographers seeking traditional focusing experiences.
Pros
- Classic optical design
- Bright F1.7 aperture
- Affordable renewed price
- Manual focus control
- Compatible with K Mount
Cons
- Renewed condition varies
- Manual focus only
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Its 50mm focal length provides a natural perspective ideal for portraits and street photography. The F1.7 aperture allows for excellent low light performance and beautiful bokeh effects. Renewed condition makes it available at a lower cost than new alternatives.
As a renewed product condition may vary and warranty options might be limited compared to new items. Manual focus requires skill and patience which may not suit all users. These factors should be weighed against the cost savings and optical performance.
This lens is ideal for those who appreciate classic manual focus and want to save money. It is recommended for portrait shooters who prioritize aperture over autofocus. If you value simplicity and optics this renewed lens offers good value.
Classic Manual Focus
Traditional manual focus ring provides precise control over composition and focus points.
Renewed Value
Renewed condition offers a more affordable access point to proven optical performance.
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6. Sigma 28-80mm – Best Budget Kit Replacement
Sigma 28-80mm F3.5-5.6
28-80mm zoom range
Aspherical lens design
Macro functionality
HF motor system
The Sigma 28-80mm lens is a versatile kit replacement offering a practical zoom range for everyday shooting. Aspherical lens design helps maintain sharpness and reduce aberrations. Its lightweight design makes it easy to carry for extended photography sessions.
Pros
- Versatile zoom range
- Aspherical elements for sharpness
- Macro capabilities included
- Lightweight build
- Affordable pricing
Cons
- Variable aperture
- Limited low light performance
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This lens covers a useful range from wide angle to short telephoto making it suitable for various subjects. Macro functionality adds flexibility for close up shots without additional lenses. The HF motor provides reasonable autofocus performance for general use.
The F3.5-5.6 aperture limits low light capabilities compared to faster primes. Build quality is functional but may not match premium standards. These compromises are standard for budget friendly zoom lenses in this class.
This lens is ideal for beginners seeking a versatile and affordable option for general photography. It is recommended for those who want one lens to cover multiple focal lengths. If you prioritize convenience and cost this lens is a practical choice.
Versatile Zoom Range
28-80mm focal length covers wide angle to short telephoto for diverse shooting scenarios.
Aspherical Optical Design
Aspherical elements help correct aberrations ensuring sharp images across the frame.
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7. Pentax Asahi SMC M 50mm – Best Vintage Option
Pentax Asahi SMC M 50mm F2
50mm focal length
F2 maximum aperture
Manual focus lens
PK Bajonett mount
The Pentax Asahi SMC M 50mm F2 is a vintage manual focus lens offering classic optical character. Its F2 aperture allows for decent low light performance and creative depth of field. Photographers appreciate its build quality and unique rendering compared to modern lenses.
Pros
- Classic manual focus design
- F2 aperture for low light
- Durable metal construction
- Unique vintage character
- Compatible with adapters
Cons
- Older optical design
- Requires manual focus
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This lens provides a true 50mm focal length with manual focus for precise control. The metal construction ensures durability and a solid feel in hand. It adds a retro aesthetic and shooting experience to modern digital cameras.
Older designs may not match modern sharpness or coatings. Manual focus requires patience and practice which might not suit all shooters. These limitations are acceptable for those seeking vintage aesthetics and character.
This lens is ideal for enthusiasts who enjoy manual focusing and vintage optics. It is recommended for portrait and artistic shooters seeking unique rendering. If you value character over clinical sharpness this lens is a rewarding choice.
Vintage Optical Character
Classic lens design offers unique rendering and flare characteristics distinct from modern optics.
Manual Precision
Manual focus allows precise control and a more deliberate shooting process.
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8. Pentax SMC 50mm F/2.0 – Best Renewed Portrait Lens
Pentax SMC 50mm F/2.0 (Renewed)
50mm focal length
F2 maximum aperture
Prime lens design
Manual focus control
The Pentax SMC 50mm F/2.0 renewed option delivers crystal clear images with vibrant colors for portrait work. Its F2 aperture enables shallow depth of field and excellent low light performance. The durable construction ensures reliable performance across various conditions.
Pros
- Crystal clear optics
- Bright F2 aperture
- Manual focus precision
- Metal mount build
- Renewed affordability
Cons
- Renewed condition varies
- Manual focus only
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This prime lens offers a natural 50mm perspective ideal for everyday and street photography. The manual focus ring provides precise control for creative shots. Metal mount construction adds to the durability and longevity of the lens.
As a renewed product condition and warranty may vary compared to new items. Manual focus requires time which might limit fast shooting scenarios. These factors are minor given the optical quality and price savings.
This lens is ideal for portrait photographers seeking high quality optics on a budget. It is recommended for those who value manual focus and build quality. If you want a reliable prime lens this renewed option is a strong contender.
Crystal Clear Optics
High quality glass ensures detailed images with vibrant color reproduction.
Durable Metal Build
Metal mount and construction provide reliability for long term use.
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9. SMC Pentax-M 50mm F1.7 – Best Manual Prime
SMC Pentax-M 50mm F1.7
50mm focal length
F1.7 maximum aperture
Manual focus operation
SMC coating
The SMC Pentax-M 50mm F1.7 is a compact manual focus prime known for its optical performance. Its F1.7 aperture allows for bright viewing and shallow depth of field. The SMC coating helps reduce flare and ghosting for clearer images.
Pros
- Bright F1.7 aperture
- Manual focus precision
- SMC coating for clarity
- Compact lightweight
- High optical performance
Cons
- Manual focus only
- No image stabilization
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This lens provides a classic 50mm focal length ideal for portraits and street work. The manual focus ring offers tactile control for precise composition. It is lightweight and easy to carry for any photography adventure.
Manual focus requires steady hands and patience for moving subjects. The lack of stabilization means using faster shutter speeds in low light. These trade-offs are minor for those who enjoy manual shooting.
This lens is ideal for photographers who appreciate manual focus and compact size. It is recommended for street and portrait shooters prioritizing optics. If you value simplicity and performance this lens delivers excellent results.
SMC Coating Benefits
Super Multi Coating reduces flare and ensures high contrast images.
Manual Focus Experience
Manual focus provides deliberate control and a more engaging shooting experience.
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10. K&F CONCEPT Lens Cap Kit – Best Accessory Bundle
K&F CONCEPT Lens Cap Kit
Includes lens caps
Includes body caps
Includes hot shoe cover
Pentax K Mount compatible
The K&F CONCEPT rear lens cap and body cap kit offers essential protection for Pentax K mount cameras. It includes caps for both lens and body plus hot shoe covers for comprehensive protection. The high impact plastic ensures durability against drops and dust.
Pros
- Comprehensive protection kit
- High impact plastic material
- Simple quick installation
- Includes cleaning cloth
- Compatible with K Mount
Cons
- Accessory not a lens
- Fit may vary by model
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This kit is designed for easy installation with quick bayonet rotation. It protects lenses and sensors from dust water and fingerprints. The included microfiber cloth adds convenience for cleaning equipment on the go.
This is an accessory rather than a lens which may confuse some buyers expecting optics. Fit is generally good but may vary slightly by model. These factors are minor given the protection value offered.
This kit is ideal for photographers seeking to protect their K mount gear efficiently. It is recommended for those who want durable covers and a cleaning cloth. If you want to keep your gear safe this bundle provides excellent value.
Comprehensive Protection
Includes body caps lens caps and hot shoe covers for full camera protection.
Quick Easy Install
Strictly follows bayonet specifications for simple and secure installation.
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Buying Guide – How to Choose the Best K Mount Lenses for Pentax Camera
Selecting the right lens involves considering focal length, aperture, build quality, and your specific photography needs.
Focal Length
Focal length determines the field of view and magnification of your lens. Shorter focal lengths like 28mm or 35mm are ideal for landscapes and street photography while longer ones like 70-300mm are suited for wildlife or sports.
Choose a focal length that matches your typical shooting subjects and desired perspective.
Aperture
Aperture affects light intake and depth of field. A wider aperture such as F1.7 allows for better low light performance and more background blur compared to F5.6.
Prioritize wider apertures for portraits and low light shooting while smaller apertures suffice for daylight landscapes.
Mount Compatibility
Ensure the lens mount matches your Pentax camera body. Most K Mount lenses fit digital and film K series cameras but some may have limitations.
Check compatibility with your specific model to ensure proper fit and functionality.
Autofocus vs Manual Focus
Autofocus lenses offer convenience for fast moving subjects while manual focus lenses provide more control and often better build quality at lower prices.
Select based on your shooting style and whether speed or precision matters more.
Build Quality
Higher end lenses often feature metal mounts and weather sealing for durability in harsh conditions while budget options may use plastic.
Consider weather resistance if you shoot outdoors frequently or in varied environments.
Optical Design
Lenses with aspherical or ED elements reduce aberrations and improve sharpness. Coatings like SMC help minimize flare and ghosting.
Look for lenses with advanced optical elements if image quality is a top priority.
Price
Prices vary widely based on brand, build, and features. Budget lenses offer value while premium ones justify cost with performance.
Set a realistic budget and prioritize features that matter most to your photography goals.
Accessories
Protective kits and cleaning supplies help maintain your lenses over time. Having spare caps and cloths extends the life of your gear.
Invest in protective accessories alongside your lens to ensure longevity and performance.
How to Use and Care for Your K Mount Lenses for Pentax Camera
Always attach the lens firmly by aligning the mark on the lens with the camera body and rotating until it clicks. Ensure caps are removed before shooting to avoid blurry images.
Keep lenses clean by using a microfiber cloth to gently wipe the front element. Avoid using fingers directly and store lenses in a dry place when not in use.
Regularly check for dust inside the lens and use a blower to remove particles. Handle lenses carefully to avoid drops and use protective caps when changing lenses.
Frequently Asked Questions
What is the K Mount system for Pentax cameras?
The K Mount is the standard lens mount used by Pentax for its SLR and DSLR cameras. It allows compatibility between film and digital bodies ensuring versatility. Most K Mount lenses fit Pentax K series cameras seamlessly.
Can I use K Mount lenses on other camera brands?
K Mount lenses are designed specifically for Pentax cameras but adapters exist for other mounts. Compatibility varies by adapter and may limit autofocus or aperture control. Check adapter specs before use with non Pentax bodies.
Do all Pentax lenses support autofocus?
Not all Pentax lenses support autofocus as some older models are manual focus only. Newer K Mount lenses typically include autofocus but manual versions exist. Check lens specifications before purchasing.
Are weather resistant lenses worth the extra cost?
Weather resistant lenses offer better durability in rain or dust which is valuable for outdoor shooters. They are worth the cost if you frequently shoot in challenging conditions. Otherwise standard lenses may suffice.
What aperture is best for portrait photography?
Apertures like F1.7 or F2 are ideal for portraits as they create shallow depth of field and background blur. These settings isolate the subject effectively. Choose wider apertures for better separation.
How do I clean my Pentax lens safely?
Use a microfiber cloth to gently wipe the front element avoiding direct contact with fingers. A blower can remove dust without scratching the glass. Store the lens in a dry place to prevent mold.
Can I use K Mount lenses on full frame Pentax cameras?
Most K Mount lenses work on full frame Pentax cameras like the K1 with proper compatibility. Some lenses may have vignetting or limitations. Verify compatibility before purchase.
What is the benefit of a 50mm lens?
A 50mm lens offers a natural perspective similar to human vision ideal for portraits and street photography. It is versatile and often affordable. This focal length is a great starting point.
Final Thoughts on Choosing the Best K Mount Lenses for Pentax Camera
Our top picks include the Pentax SMC PENTAL-Da 35mmF2.4AL for overall value the Andoer 50mm F1.7 for budget and the Pentax 18-135mm WR for premium versatility.
Prioritize focal length aperture and build quality based on your specific shooting needs and environment to ensure the best results.
Check current availability and pricing before purchase as offers change frequently. Choose the lens that best fits your style and goals for rewarding photography.