|
|
 A Canon Extender is a high-quality teleconverter that preserves the image
quality of the lens it's mounted to and multiplies its focal length. When
combined with pro level EOS cameras & EF supertelephoto lenses with image
stabilization, near imperviousness to weather extremes is achieved thanks to
rubber gasket seals. Improved antireflective internal coatings also increase
transmissivity & performance in backlit conditions. |
| Teleconverters for Canon EOS Cameras |
  Canon EF 1.4X II Extender
Telephoto Accessory. Multiply the focal length of your 135mm or longer lens by 1.4x without sacrificing image quality with the Canon EF 1.4x II extender. Optically superb, the lens fits all Canon 135mm fixed focal length lenses (except the 135mm f/2.8 Softfocus lens), along with the
EF 70-200mm f/2.8L, 70-200mm f/2.8L, 70-200mm f/4.0L, 70-200mm f/4.0L IS USM, and
100-400mm f/4.5-5.6L IS zoom lenses. In addition, the extender doesn't sacrifice your
autofocus on any
EOS camera as long as it's combined with a lens having an f/4 or faster maximum aperture (the extender reduces the effective aperture by one f-stop). Best of all, this version maintains the outstanding optics of the earlier incarnation, but adds a weather-resistant construction and improved anti-reflective surfaces in the barrel. The EF 1.4x II extender, which measures 2.9 inches in diameter and 1.1 inches long, weighs 7.8 ounces.
1.4x telephoto extender for multiplying focal length of Canon 135mm or longer lenses.
Fits all 135mm or longer fixed focal length lenses and some 70-200mm
telephoto lenses.
Preserves autofocus on any EOS camera when combined with f/4 or faster lens.
Weather-resistant construction and improved anti-reflective surfaces in the barrel.
Measures 2.9 inches in diameter and 1.1 inches long; weighs 7.8 ounces.
You can find the
Canon EF 1.4X II Extender at Adorama
or the Canon EF 1.4X II Extender at Amazon
or the Canon EF 1.4X II Extender at B&H Photo
|
 Canon EF 2X II Extender
Telephoto Accessory. Designed to double the focal length of any compatible Canon EF lens, the Canon EF 2x II extender telephoto accessory is ideal for
sporting events and
nature photography. The lens boasts a new seven-element design, along with the same weather-resistant and anti-reflective internal construction as the companion EF 1.4x II extender. More significantly, the extender supports autofocus with any
EOS body provided the lens has an
f/2.8 or faster maximum aperture (the EF 2x II reduces effective aperture by two stops). The EF 2x II--which also maintains an EOS camera's
Image Stabilization technology--carries a one-year warranty.
Magnification: 2.0x
Lens construction: 7 elements in 5 groups
Dimensions: 2.8 inches in diameter and 2.3 inches long
Weight: 9.3 ounces.
Buy the Canon EF 2X II Extender at Adorama
or get the Canon EF 2X II Extender at Amazon
|
  Kenko Teleplus PRO 300 DG
AF 1.4x Teleconverter for Canon EOS. This is an exceptional tele-converter
for Canon EOS lenses. There are a number of tele-converters out there for
current Canon SLR's and lenses (Sigma,
Tamron and of-course Canon just to
name a few). The Canon converters are only compatible with Çanon L series
lenses and will only auto focus with apertures of F4 and larger (for 1.4X)
and F2.8 and larger (for 2x).
The Kenko PRO 300 has the same aperture
limitations (unless some of the pins are taped) however it will work with
most Canon lenses. This is definitely a quality PRO product. When used with
a high quality lens. The IQ (image quality) is almost indistinguishable from
the lens. In addition focus speed seems just as fast as the lens with out
the tele-converter (assuming your lens has an F4 aperture or larger). The
general consensus seems to be that the Canon converter is slightly sharper
on the edges with the Kenko being equal at the center. For those shooting
with a 1.6 crop camera the Kenko should be indistinguishable from the
Canon
for about a $100.00 less.
On the plus side (other then price) the Kenko is
more compact and can easily fit in you pocket and can be used with far more
lenses (again, the Canon converts can only be used with
L series lenses). On
the down side, if your using L series lenses, is the color. The Kenko is
black while most L series lenses are white (as are the Canon tele-converters).
What you get with the Kenko PRO 300 is an excellent tele-converter designed
for digital cameras. The elements are
special coated to reduce reflections
from the image sensor back into the lens. I've yet to notice any
chromatic
aberration or vignetting. The color and sharpness are as good as the lens
you're using. you can
|
  Sigma APO Teleconverter 1.4x EX DG for Canon Mount
Lenses. The Sigma APO Teleconverter 1.4x EX DG for Canon Digital SLR Cameras is a dedicated APO teleconverter that can be mounted between select lenses and the camera body to increase the focal length by the power of 1.4. The multi-layer coating reduces
flare and ghosting, which is a common problem with digital cameras. The lens also offers maximum magnification without any variation in the minimum focusing distance. Compact and lightweight, this teleconverter can convert your lenses into longer focal-length lenses, so you don't have to do a lot of unnecessary footwork. A case for the lens is included.
|
  Tamron SP Autofocus 1.4x Pro Teleconverter Lens for Canon SLR Cameras. The SP AF PRO-series teleconverters, with a newly designed optical construction (4-group/5-element for 1.4X and 4-group/7-element for 2X), are designed to be used with lenses that are F/2.8 and of focal lengths of 90mm or greater. This would make the use of the SP teleconverters ideal for the Tamron SP90mm F/2.8 macro, 70-210mm F/2.8 and 300mm F/2.8. Relative illumination is significantly improved resulting in better overall contrast and resolution across the entire image field. In addition,
chromatic aberration and
astigmatism are better compensated for by virtue of the use of higher-grade glass materials and more sophisticated design techniques than used in universal-type teleconverters. When used with lenses with smaller maximum apertures (F/4 and F/5.6, for example), there will be little difference in image quality as compared with the standard Tamron teleconverters.
When used with lenses wider than 90mm, the SP teleconverters can actually comprise image quality.The 1.4X teleconverter will increase the focal length of the master lens by 1.4X and make the lens one f-stop slower. In addition to increasing focal length, this teleconverter allows greater magnification in
macro since the Minimum Object Distance (MOD) of the master lens does not change when used with the teleconverters. The 1.4X teleconverter can be used with both AF and MF lenses. AF will be retained if the master lens is F/4.5 or faster.
|
 Tamron Autofocus 1.4x
Teleconverter Lens for Canon SLR Cameras. Simply fit a Tamron teleconverter between the lens and the camera body. This increases the focal length and gives you extended telephoto capabilities so you can take
photos with greater magnification from the same camera position. Tamron's AF teleconverters are compatible with most AF (autofocus) and autoexposure cameras.
|
 Tamron AF20C-700 AF 2X Teleconverter for Canon EOS Mount. Teleconverters, either 1.4X or 2X, are efficient tools to add focal length to the
photographer's arsenal. The 2X doubles the focal length of the master lens and makes the lens two f-stops slower. In addition to increasing focal length, this teleconverter allows greater magnification in macro since the Minimum Object Distance (MOD) of the master lens does not change when used with the teleconverters. AF will be retained with the 2X teleconverter if the master lens is F/4.0 or faster.
|
 Tamron SP Autofocus 2x Pro Teleconverter Lens for Canon
SLR Cameras. The SP AF PRO-series teleconverters, with a newly designed optical construction (4-group/5-element for 1.4X and 4-group/7-element for 2X), are designed to be used with lenses that are F/2.8 and of focal lengths of 90mm or greater. This would make the use of the SP teleconverters ideal for the Tamron SP90mm F/2.8 macro, 70-210mm F/2.8 and 300mm F/2.8. Relative illumination is significantly improved resulting in better overall contrast and resolution across the entire image field. In addition, chromatic aberration and astigmatism are better compensated for by virtue of the use of higher-grade glass materials and more sophisticated design techniques than used in universal-type teleconverters.
When used with lenses with smaller maximum apertures (F/4 and F/5.6, for example), there will be little difference in image quality as compared with the standard Tamron teleconverters. When used with lenses wider than 90mm, the SP teleconverters can actually comprise image quality.The 2X doubles the focal length of the master lens and makes the lens two f-stops slower. In addition to increasing focal length, this teleconverter allows greater magnification in macro since the Minimum Object Distance (MOD) of the master lens does not change when used with the teleconverters. AF will be retained with the 2X teleconverter if the master lens is F/4.0 or faster.
|
See also
Circumvent brand loyalty without guilt
by owning them all.
|
|
