Bower SX7PK 2x Telextender with 7 Lens Elements
The Bower SX7PK 2x Telextender (also known as a tele-extender) will multiply the focal length of your existing lens by 2x, and will cut back the amount of light by 2 f/stops while maintaining full autofocus coupling.
For example, using a 2x teleconverter with a 300mm lens will effectively increase the focal length to 600mm. A lens set to f/2.8 will now be f/5.6. With a 7 elements optical design this telextender yields superior field flatness and edge sharpness compared to converters with fewer elements.
Teleconverters are not recommended for lenses wider than 50mm, e.g. 28-105mm. However, full AF operation is only possible with lenses with open aperture of f/2.8 or brighter. Please be aware that AF will work properly only if there is enough light and contrast on the subject to activate the camera's AF sensors. Manual focusing is recommended when using lenses with smaller open f-stop value than those given above.
- Compact and lightweight
- Precision engineered
- Doubles the focal length of your lens while full auto coupling is maintained
- 10-Year warranty against defects in manufacturing
- Made in Japan
REVIEW SNAPSHOT®
by PowerReviews(based on 2 reviews)
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REVIEWS
Reviewed by 2 customers
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Pros
- Consistent Output
- Durable
- Easily Interchangeable
- Fast / accurate auto-focus
- Fast on my prime lens
- Lightweight
- Rugged
- Strong Construction
Cons
Best Uses
- Landscape/Scenery
- Night Photography
- Sports/Action
- Wildlife Photos
Comments about Bower SX7PK 2x Telextender with 7 Lens Elements:
great for getting that long shot when you do not wish to pack the long lens
- Was this a gift?:
- No
Pros
- Easy to Use
- Improves Function
- Lightweight
Cons
Best Uses
- Traveling
- Wildlife
Comments about Bower SX7PK 2x Telextender with 7 Lens Elements:
just received the unit bought from BH on my behalf. I found out that the mechanism of the extender is always connected to the 18-250 pentax lens and creates a very heavy drag in manual focus mode. I was concerned that this may damage the focusing mechanism of the main lens. I opened up the unit to take out the extender's gears to avoid this. Note: autofocus was very inaccurate with my 18-250 pentax lens so I just use manual. Initially, images look sharp if manually focused.
Displaying reviews 1-2
Care & Cleaning
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- Original: $4.99
- Save: $0.50
- Price: $4.49
What's in the Box
- Front Lens Cap
- Rear Lens Cap
- Lens Pouch
- 10-Year Warranty against Defects in Manufacturing
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