Telephoto Lens Canon
2.0x Telephoto Lens? Canon 550D?
On eBay, there are lenses that you can buy for my Canon 550d.
They are called "2.0x Telephoto Lenses", and I am still not quite sure what they will do. Do they just double my zoom? Will it allow my 18-55mm lens go to 110mm?
The new Canon EF 200-400 mm (2x) telephoto lens has not been released yet. It may be a while longer after the earthquake and tsunami damage to most of the industrial plants in Japan before you see them available. My guess is that Canon will try an market the 200-400 mm lens at a price somewhat under the current Nikkor 200-400 mm f/4 which costs around $6500
What you seem to be talking about is called a telextender and they are designed to be placed between the camera and lens, lenses that have an aperture of f/2.8 or larger, like the EF 70-200 mm f/2.8
Putting a 2x telextender on a 18-55 mm lens will probably prevent you from being able to use the cameras light meter and unless designed specifically for an EOS camera, probably not work at all
NOTE: If what you are referring to is an "add-on" lens, it is a $40 piece of junk, NOT worthy of your fine $1,000 camera and the lens that came with it
 Canon EF-S 55-250mm f/4.0-5.6 IS Telephoto Zoom Lens for Canon Digital SLR Cameras + Lens Cleaning Kit List Price: Sale Price: $176.29 You save: $123.66 (41%)  Eligible for free shipping!Availability: Usually ships in 1-2 business days  |
 Canon EF-S 55-250mm f/4.0-5.6 IS Telephoto Zoom Lens for Canon Digital SLR Cameras List Price: Sale Price: Too low to display Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Canon EF 75-300mm f/4-5.6 III USM Telephoto Zoom Lens for Canon SLR Cameras List Price: Sale Price: $186.00 You save: $134.00 (42%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens for Canon SLR Cameras List Price: Sale Price: $159.95 You save: $40.04 (20%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 Canon EFS 55-250mm f/4.0-5.6 IS II Telephoto Zoom Lens for Canon Digital SLR Cameras List Price: Sale Price: $172.44 You save: $127.55 (43%) Eligible for free shipping!Availability: Usually ships in 2-3 business days |
 Canon EF 50mm f/1.8 II Camera Lens List Price: Sale Price: $110.00 You save: $90.00 (45%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Canon EF 70-300mm f/4-5.6 IS USM Lens for Canon EOS SLR Cameras List Price: Sale Price: $374.99 You save: $275.00 (42%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Opteka 650-1300mm High Definition Telephoto Zoom Lens for Canon EOS 1D, 5D, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Rebel XT, XTi, XS, XSi, T1i, T2i, T3 and T3i Digital SLR Cameras List Price: Sale Price: $245.00 You save: $154.95 (39%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Opteka High Definition 500mm / 1000mm f/8 Preset Telephoto Lens for Canon EOS 1D, 5D, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Rebel XT, XTi, XS, XSi, T1i, T2i, T3 and T3i Digital SLR Cameras List Price: Sale Price: $109.95 You save: $70.04 (39%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
Canon EF 75-300mm f/4-5.6 III Telephoto Lens Review With SAMPLE PICTURES!
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