Harrison Cameras

Used Canon EF 2x Extender Mark III

Used Canon EF 2x Extender Mark III - Main image
$175.95 $255 In stock

Category: Used - Accessories - Converters and Extenders

The Canon EF 2x Extender Mark III doubles the effective focal length of your compatible EF lenses, transforming a 200mm lens into a 400mm telephoto. This optical multiplier maintains excellent image quality whilst enabling tighter framing for wildlife, sports, and distant subjects. The Mark III iteration features improved optical coatings for reduced flare and enhanced contrast. Compatible with most Canon EF telephoto lenses (70mm and above), it integrates seamlessly into your existing kit. A practical solution for extending reach without investing in additional glass.

Condition: Used - Excellent

Includes:

  • Box
  • Cap
Completing your purchase

Take a moment to review your selection and total before payment.

Preparing your order

Please consider both preparation and transit when planning your purchase.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
Requesting a refund

Contact the store with your order details so your request can be reviewed.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery arrangements

The available delivery services and charges are listed below.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Before arranging a return

Speak with the store before arranging a return shipment.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (5.0 / 5 · 5 reviews)

Nicholas C. ★★★★★

The mount is rock solid and clicks in exactly like a native lens—zero wobble. I’ve been shooting birds at 400mm all weekend and the autofocus still locks on fast enough for my needs. Backing up your glass with this is a no-brainer.

Charlotte N. ★★★★★

I was worried about losing light, but autofocus on my 70-200mm f/2.8 still locks fast even in overcast conditions.

Ellie ★★★★★

Sharpness holds up way better than I expected for a 2x converter—at f/8 on my 200mm it's still perfectly usable for wildlife shots. The build feels solid and the locking mechanism is reassuringly tight, though it does add noticeable weight to the lens. For the price of a used unit, it's a bargain wa