CANON UK0804 Extender Ef 1.4X

( Brand: Canon ), ( Manufacturer Part Number: UK0804 ), ( Model: 1.4X ), ( Part Type: Extender ), ( Manufacturer Warranty: No ), ( Serial Number: 37864 )

Review CANON Extender Ef

The **Canon EF 1.4x Extender EF UK0804** is a versatile and high-performance optical telephoto extender designed to elevate the creative possibilities of Canon EF-mount lenses, particularly those equipped with image stabilisation. This compact yet robust accessory is engineered to deliver exceptional image quality while maintaining a natural, unaltered bokeh effect, making it an ideal choice for photographers seeking to enhance their reach without compromising sharpness or clarity. Built with Canon s signature precision, the UK0804 features a lightweight yet durable magnesium alloy construction, ensuring both portability and longevity in demanding shooting conditions. Its seamless integration with Canon s lens mount system guarantees minimal vignetting and distortion, even when paired with wide-angle lenses, though it is optimised for use with telephoto lenses where its full potential shines. The extender operates on a simple yet effective optical principle, multiplying the focal length of compatible lenses by 1.4x while preserving the original aperture rating, allowing photographers to achieve striking close-ups, compress compositions, or capture distant subjects with remarkable detail. Whether used for wildlife photography, sports action, or creative portraiture, this extender enhances depth perception and sharpness, making it a favourite among professionals and enthusiasts alike who demand the finest optical performance. Its compatibility with Canon s Dual Pixel AF and image stabilisation systems ensures smooth autofocus tracking and reduced camera shake, further enhancing its reliability in fast-paced or low-light scenarios. With its unobtrusive design and reliable build, the EF 1.4x Extender UK0804 is a must-have tool for photographers looking to push the boundaries of their lens capabilities without sacrificing image integrity.

### **Pros and Cons of buying a Canon EF 1.4x Telephoto Extender (UK0804)**

The **Canon EF 1.4x Telephoto Extender** is a versatile optical accessory designed to increase the effective focal length of compatible Canon EF-mount lenses. Below is a detailed breakdown of its advantages and disadvantages.

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### **Pros**

1. **Increases Reach Without Buying a New Lens**

- The extender allows photographers to achieve longer focal lengths (e.g., turning a 70-200mm lens into a 98-280mm) without purchasing a more expensive telephoto lens.

- Useful for wildlife, sports, and landscape photography where a longer reach is desired but a heavier lens is impractical.

2. **Improves Optical Quality on Some Lenses**

- Unlike digital zoom, which degrades image quality, the **1.4x extender** preserves optical sharpness and detail when used with high-quality lenses.

- Some Canon lenses (particularly professional-grade models) perform exceptionally well with this extender, maintaining sharpness and contrast.

3. **Lightweight and Compact**

- Weighing just **100g**, it is significantly lighter than most telephoto lenses, making it easy to carry in a camera bag.

- Fits into standard lens hoods and doesn t add bulk compared to swapping lenses.

4. **Versatile for Different Genres**

- Useful in **wildlife, sports, and portrait photography** where a slight telephoto boost is needed.

- Can also be used in **macro photography** when combined with a macro lens to increase magnification.

5. **No Moving Parts or Mechanical Issues**

- Unlike some adapters or teleconverters, this is a purely optical device with no electronic components, reducing the risk of failure.

6. **Compatible with Most Canon EF Lenses**

- Works with **most Canon EF-mount lenses**, though performance varies by lens quality.

- Does not work with EF-S lenses (requires an adapter) or mirrorless RF lenses.

7. **Affordable Compared to New Telephoto Lenses**

- Costs around ** 150- 200**, making it a budget-friendly alternative to buying a more expensive telephoto zoom (e.g., a 200-500mm lens).

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### **Cons**

1. **Reduces Maximum Aperture**

- The extender **reduces the effective aperture** by the extension factor (e.g., a lens with f/4 becomes f/5.6 when using the 1.4x extender).

- This can lead to **noise in low-light conditions** and requires faster shutter speeds or higher ISO settings.

2. **Performance Varies by Lens**

- **Cheap or older lenses** may suffer from **softness, chromatic aberration, or vignetting** when used with the extender.

- **High-end lenses (e.g., L-series)** handle it better, but even they may lose some sharpness at the edges.

3. **Limited Magnification Boost**

- A **1.4x extender** is not as powerful as a **2x extender**, which can be more useful for extreme telephoto work.

- If you need **double the reach**, this extender may not be sufficient alone.

4. **No Electronic Compatibility with RF Lenses**

- **Does not work with Canon s newer RF-mount lenses** (requires an adapter, which may introduce additional optical issues).

- Only compatible with **EF-mount lenses** (including EF-S with an adapter).

5. **Can Increase Noise in Digital Photography**

- Since the extender reduces light transmission, **high ISO settings may be needed**, leading to more digital noise in low-light scenarios.

6. **Not Ideal for Fast-Moving Subjects**

- While it helps with reach, the **reduced aperture** means you may struggle with motion blur in fast-paced situations unless you compensate with faster shutter speeds.

7. **Potential for Vignetting**

- Some lenses may exhibit **darkening at the corners** when used with the extender, though this is usually minimal on high-quality optics.

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### **Conclusion**

The **Canon EF 1.4x Telephoto Extender (UK0804)** is a **practical and affordable** solution for photographers who need a **modest increase in focal length** without investing in a new lens. It excels when paired with **high-quality Canon EF lenses**, particularly in **wildlife, sports, and portrait photography**, where its **lightweight and compact design** is a major advantage.

However, its **limitations such as aperture reduction, potential softness on lower-end lenses, and lack of compatibility with RF lenses mean it is not a universal fix**. If you already own a **sharp, high-quality lens**, the extender can be a **great addition**. But if you re working with **budget or older lenses**, results may be disappointing.

For **serious telephoto work**, a **2x extender or a dedicated telephoto zoom lens** might be a better long-term investment. But for **casual users or those who occasionally need extra reach**, the **1.4x extender is a solid, cost-effective choice**.

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### **Recommendation**

You own a **high-quality Canon EF lens** (preferably L-series) and want a **lightweight way to extend reach**.

You shoot **wildlife, sports, or portraits** and occasionally need a **slight telephoto boost**.

You want to **avoid buying a new expensive telephoto lens** for occasional use.

You prioritize **portability and affordability** over maximum magnification.

You use **cheap or soft lenses**, as results may be unsatisfactory.

You need **extreme telephoto reach** (consider a **2x extender or a dedicated telephoto lens**).

You shoot with **Canon RF lenses** (requires an adapter, which may degrade performance).

You frequently shoot in **low light**, as the reduced aperture will force higher ISO settings.

For **intermediate to advanced photographers with good lenses**, the **Canon EF 1.4x Extender is a worthwhile accessory**. For **beginners or those with lower-end gear**, its benefits may not outweigh the drawbacks. Always **test it with your specific lens** before committing.

Details:

Model Extender EF 1.4X II. Canon Extender EF 1.4X II UK0804: $109.99. Functionality condition: This device is in fully working, used condition. No UPC N/A Serial# 37864 Cosmetic condition: This device is used in good condition.

There are some scratches or scuffs from everyday use. It has been tested to ensure all aspects are working as they should. This device is in fully working, us condition. Rigorously tested and cleaned.

Wiped of all data. Thoroughly inspected by experts. Devices have not been reassembled. Save money, reduce your impact, while enjoying the same great tech.

Condition is thoroughly assessed. Please view our close up photos, as these are taken of the actual item being offered for sale. This device is using good condition. Your New Home for, Pre-owned Tech: Get the best deals on everything from smartphones, tablet's, laptops, camera gear, and even gaming gear.

part #: uk0804 prices

• $89.99-$298.36

specifications filtecam:

• brand: Canon
• mpn: Uk0804
• model: 1.4x
• part type: Extender
• manufacturer warranty: No
• serial number: 37864

shipping filtecam:

• type: Fixed
• service: USPS Ground Advantage
• transit: 4-8 Days
• class: Standard
• cost: $0.00
• carrier: USPS

returns filtecam:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller
• method: Money back

offer filtecam:

• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: March 27, 2026
• sold: 0

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• credit card: Visa
• wallet: Apple-pay

seller filtecam:

• city: Kansas City, Missouri
• rating: 99.1%
• # reviews: 1514

general filtecam:

• condition: Used
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