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$139.95
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About Bower SX7DGC

The Bower's 2x DGII Teleconverter (7 Element) for Canon will effectively double the focal length of your Canon lens, while maintaining the autofocus function - a 35 mm lens becomes a 70 mm lens. This 7-element teleconverter uses multi-coated optics to deliver improved image quality. With an 85 mm f/1.4 lens, for example, the focal length will become 170 mm, which effectively sets the maximum aperture at f/2.8 (cutting the amount of light captured by two f/stops). This teleconverter is a portable, high-quality and versatile accessory that's well worth having in your camera bag. It's only compatible with lenses with a maximum aperture greater than f/4.0 in order to fully utilize its autofocus capabilities.

Bower SX7DGC Features

  • Doubles the focal length of a Canon EF lens (not compatible with EF-S lenses)
  • 7 optical elements for sharp images

Bower SX7DGC Specifications

Magnification
2x
Lens Elements/Groups
7 elements
Length
2.15" (5.46 cm)
Diameter
2.65" (6.73 cm)
Weight
8.0 oz (227 g)

Bower SX7DGC Reviews

Reviewed by 2 customers

 
1.0

Drained battery

By

from NY  -  Photo Enthusiast

For some reason this product drained the battery in my camera (6D) even while the camera was powered off. I confirmed this through a simple test of observing the battery level over time with different things attached to it. When I wrote in to Bower they never replied about a possible cause or solution. I returned the Item. I did try it, its hard to use because you lose 4 stops of light also the images it produced were not sharp.

 
4.0

Great quality product

By

from Brownstown,IL  -  Casual Photographer

I used this teleconverter for shooting the moon and worked great! Took some time using manual focus which takes a few shots to get it right.

Q&A

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Questions about this item:

Shopper  Will this lens work on a Canon EOS Rebel T3 12.2 MP CMOS Digital SLR Camera with EF-S 18-55mm f/3.5-5.6 IS II Zoom Lens?
PAUL N  I'M NOT SURE I CAN HELP YOU. I USE A CANON REBEL T-1I THE BOWER WORKS WELL WITH IT. I HAVE A EF 17/40 W/A ZOOM AND I DO NOT GET ANY SHADOWS ON THE EDGES. I USE THE COMBO ALL THE TIME. IT WILL NOT WORK WELL WITH A 70/300 ZOOM.
Peter F  I own A Canon 7D with a EF Ultrasonic 28-135 lens. Will I be able to use a teleconverter like this without loosing performance on my lens? Thanks
Lee F  A teleconverter will always cause a loss in performance. For one, a 2x converter will add two f-stops, which closes down your aperture on your lens quite a bit, considering that you're already at f/5.6 when zoomed out. This means you lose a fair amount of depth of field control and have to shoot at slower shutter speeds or make other adjustments. You will also lose the ability to autofocus in low light because the teleconverter does not allow enough light to enter the lens. Finally, teleconverters always degrade image quality at least a little bit because you're putting more glass between the subject and the sensor. The Canon one is best, but you'll always lose some quality. If you're shooting in bright light, you'll probably fine. If not or if you're shooting fast-moving subjects, you probably won't be happy with a teleconverter.
Paul G  I have a Sony 18 to 25 Telephoto lense. Will this Teleconverter work with this lense? Paul
Andrew R  Unfortunately no, this teleconverter is not compatible with Sony lenses.
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