• Canon 1.4x III - 1896
  • Canon 1.4x III - 1896
  • Canon 1.4x III - 1896
  • Canon 1.4x III - 1896
  • Canon 1.4x III - 1896
  • Canon 1.4x III - 1896
  • Canon 1.4x III - 1896
  • Canon 1.4x III - 1896
  • Canon 1.4x III - 1896
  • Canon 1.4x III - 1896

Canon 1.4x III - 1896

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  • Full Interior Kit
  • Since 2009

Canon 1.4x III - 1896

Extending a lenses focal length by a factor of 1.4x, Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of Canon super telephoto lenses. The Fluorine coating resists soiling, smears and fingerprints. Extender EF 1.4X III maintains high standards not only optically, but also in terms of rugged, dustproof and water resistant construction.

What our Experts Think
  • Reliable teleconverter boost: The Canon 1.4× III teleconverter extends your lens reach by 40% (e.g., 100 mm → 140 mm), giving you extra framing power without buying a new lens.
  • Maintains excellent communication: Preserves autofocus, exposure metering, and IS performance with compatible Canon EF lenses and bodies.
  • Improved optics over previous generations: Canon’s III‑series design delivers better sharpness and contrast than older 1.4× teleconverters, minimizing image degradation.
  • Compact & lightweight: Adds minimal bulk to your setup—easy to carry and use in the field.
  • Professional‑grade build: Solid construction and reliable mount fit make this a dependable choice for travel, wildlife, sports, and nature shooters.
  • Best with telephoto lenses: Works particularly well on long telephoto primes and zooms where extended reach yields the most impact.
  • Aperture & light trade‑off: Expect a 1‑stop light loss after magnification (e.g., f/2.8 → f/4), so pairing with stable bodies or strong light conditions improves results.
Q&A

Q: What is the Canon 1.4x III?
A: A 1.4× teleconverter (extender) that increases the effective focal length of compatible Canon telephoto lenses by 1.4×.

Q: How does it affect focal length and aperture?
A: It multiplies the lens’s focal length by 1.4× and reduces maximum aperture by one stop.

Q: Which mount is it designed for?
A: Canon EF mount for DSLR lenses; it can also be used on RF bodies with a Canon EF‑EOS R adapter.

Q: Is autofocus supported?
A: Yes — AF and lens communication are maintained with compatible lenses, though AF speed may be slightly slower due to the aperture change.

Q: Does it affect image quality?
A: Designed with optimized optics and coatings to minimize loss of sharpness and aberration.

Q: Is it rugged and weather‑sealed?
A: Yes — dust‑ and water‑resistant construction with fluorine coating on elements.

Q: What lenses work best with it?
A: Compatible with many Canon L‑series super‑telephoto and select zooms (e.g., 70‑200mm, 100‑400mm, 300/400/600mm telephotos). Check specific compatibility.

Q: What’s the physical size and weight?
A: Compact (≈27 mm long, 72 mm diameter) and lightweight (~225 g).

Q: Who should use this extender?
A: Photographers needing extra reach for wildlife, sports, and distant subjects without carrying longer lenses.

Q: Can it be stacked with other extenders?
A: Canon extenders are not designed to be stacked for higher multiplication.


Maintenance Tips
  • Clean front and rear optics gently with microfiber cloth + air blower
  • Always use front & rear caps to protect glass and prevent dust
  • Store in a dry box or padded case with silica gel to avoid fungus
  • Avoid touching optical surfaces directly
  • Wipe mount contacts occasionally to maintain AF and lens communication
  • Handle carefully—internal optics are precise and sensitive
  • Keep away from extreme heat, humidity, and sudden temperature changes
  • Check compatibility with lenses before mounting to ensure proper function
  • Carry in padded compartment during transport to prevent impact damage
  • Periodically inspect for dust, fungus, or mechanical issues

  • DIY Install

  • OEM-Inspired Fit

  • Air Bag Friendly

  • 3 Year Warranty

  • Custom Colors

  • Work Gear & Pet Friendly

  • Since 2009

Why Truck Owners Choose Seat Covers Over Reupholstery

Traditional Reupholstery TruckLeather Seat Covers
Upfront Cost

$2500-$4000+

$399-$999

Vehicle Downtime

Days or Weeks

None

Risk Level

Permanent, No Undo

Fully Reversible

Best Use Case

Full Restorations

Restoration or Prevention

Resale Value Impact

High Cost to Recover

High ROI

TruckLeather gives you 90% of the visual and comfort upgrade at a fraction of the cost of reupholstery without giving up your truck.

WHEN YOUR TRUCK DESERVES THE BEST. UPGRADE YOUR TRUCK'S INTERIOR WITH THE INDUSTRY DEFINING TRUCK SEAT COVERS WE HAVE REFINED OVER 15 YEARS.

  • Will these work if my seats are already damaged?

    Yes. TruckLeather seat covers are commonly used to cover cracked, faded, or worn-out truck seats while preventing further deterioration.

  • How do these compare to cheaper seat covers?

    Universal covers focus on price. TruckLeather focuses on fit, durability, and long-term protection.

  • Are these permanent?

    No. They’re fully removable and won’t alter your factory seats.

Slip on leather seat covers
Slip on leather seat covers

Easy At-Home Installation

No special tools. No upholstery shop. No risk.

Our seat covers are designed for DIY installation, with step-by-step instructions and support available if you need it. Most customers complete installation in a few hours.

STEP BY STEP INSTRUCTIONS
Red and Black Custom Leather Seat Covers for Ford F150

Your Truck.Your Style.

Custom orders are our jam. Our custom program makes for a truly bespoke experience leaving only your imagination for the thousands of possibilities. If you're looking for the best truck seat covers then look no further!

Clazzio seat cover

Airbag Safe

Our seat cover construction has a high priority for allowing the OEM seat airbags to properly deploy when needed.

The proprietary thread design allows for the SRS systems to continue to function in a collision situation.

Clazzio Leather Covers

Made for your truck.For life.

Our seat covers are made exactly for your interior setup, perfect every time.

We offer most color setups in stock such as all black and all dark gray, however our custom color program is ready for your creative setups.

FAQ

Learn more about our truck seat covers with the frequently asked questions below.

DIY installation instructions are included for your specific application and takes around 2-3 hours for full interior installation.

The specific application specific instructions provided have step by step photos of how to install your new seat covers as well as tips and tricks. 

If you don't feel comfortable installing the seat covers yourself, then any local upholstery shop should be able to install them no problem.

Some vehicles do require cutting in certain spots like the power seat control panel, but nothing too major.

These leather seat covers are 100% slip on seat covers and do not require removal of your existing seat material.

Yes, our seat covers are fully compatible with factory heated and cooled seats.

Clazzio (our manufacturer) offers a 3 year warranty that is honored on any manufacturer defects.  This does not include normal wear and tear that comes with use on these seat covers.

You will receive the full interior seat cover set which includes bottom cushion covers, top cushion covers, head rest covers, and depending on the vehicle, arm rest covers.  It is a total makeover.

They are made by 11i-USA who manufactures these under the name Clazzio. They operate a large dealer system and we are a top nationwide dealer for them.

It depends if you ordered a custom set or not.


If you ordered a set that is in stock, then it will reach you in approximately 5-6 days via UPS ground (continental U.S.). Most all black or all dark gray sets are in stock, but we will let you know upon your order.


If you ordered a custom set, then it will take 8-10 weeks (occasionally longer) to arrive from Japan due to custom manufacturing, freight time, and US customs holding time.

Maybe! Contact us to see if your specific vehicle isn't listed on our site, or if you have any questions about the application.

We do have other applications such as passenger vehicles and two door cars as well. Just contact us!

Need just a bottom cushion replacement or another single piece? Contact us for pricing.

We can also supply just the front or rear seats if that is all you need.

Since our seat covers are manufactured for every application specifically, they account for features like these in your interior. Our development team uses a laser guided measuring system to ensure the best fitment for our seat covers.

For straps to fold down seats, they will include a cutout for those to loop through.  For bottom plastic trim on your front seats, the covers are meant to tuck in to those for a great, OEM+ fitment.

Yes, our seat covers are made with special stitching construction on our per application basis (not universal). The design allow for our covers to break at the specific points where the side airbags will detonate.

Blog posts

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  • Seat Covers vs. Reupholstery: The Smarter Way to Restore and Protect Your Truck Seats

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  • When to Replace Truck Seat Covers: 7 Signs Your Truck Seats Need an Upgrade

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