2X Teleconverter fora Digital Camera

Archived from groups: rec.photo.digital (More info?)

I want to use a 2X teleconverter lenses on my Canon SLR digital camera
(20D).
I have seen three which I have listed below. The price difference between
them is really significant. Opinions on any of them would be appreciated.
Quantaray-2X AF Teleconverter for EOS $79.95
Kenko 2X AF Teleplus MC7 Teleconverter for
Canon EOS $125.00
Kenko Pro 2X 300 Teleconverter Lens $239.95
My lens is a Canon EF 100-300mm f/4-5.6.
I assume the Pro 2X 300 is the best, but are the others worth having?
Thanks.

Archived from groups: rec.photo.digital (More info?)

"Frank" <frankp111@comcast.net> wrote in message
newsv6dnchaRfWo3QPfRVn-jA@comcast.com...
> I want to use a 2X teleconverter lenses on my Canon SLR digital camera
> (20D).
> I have seen three which I have listed below. The price difference between
> them is really significant. Opinions on any of them would be appreciated.
> Quantaray-2X AF Teleconverter for EOS $79.95
> Kenko 2X AF Teleplus MC7 Teleconverter for
> Canon EOS $125.00
> Kenko Pro 2X 300 Teleconverter Lens $239.95
> My lens is a Canon EF 100-300mm f/4-5.6.
> I assume the Pro 2X 300 is the best, but are the others worth having?
> Thanks.
>
>
>
Once upon a time, I made the mistake of trying to use a 2x converter on a
Nikon 100-300 f5.6 lens. This combination is almost impossible to focus.
It is useless without a heavy tripod. When I used to one I owned then, the
tripod buckled at every joint. So, my advice is don't use any of the 2x
converters on your lens. But, if you must, buy the Canon.
Jim

Archived from groups: rec.photo.digital (More info?)

On Wed, 01 Jun 2005 23:25:41 GMT, "JohnR66" <nospam@att.net> wrote:

>"Frank" <frankp111@comcast.net> wrote in message
>newsv6dnchaRfWo3QPfRVn-jA@comcast.com...
>>I want to use a 2X teleconverter lenses on my Canon SLR digital camera
>> (20D).
>> I have seen three which I have listed below. The price difference between
>> them is really significant. Opinions on any of them would be appreciated.
>> Quantaray-2X AF Teleconverter for EOS $79.95
>> Kenko 2X AF Teleplus MC7 Teleconverter for
>> Canon EOS $125.00
>> Kenko Pro 2X 300 Teleconverter Lens $239.95
>> My lens is a Canon EF 100-300mm f/4-5.6.
>> I assume the Pro 2X 300 is the best, but are the others worth having?
>> Thanks.
>>
>>
>>
>You may be dissapointed with the results. Your lens will zoom out to 600mm,
>but it will be no faster than f/11 (2 stop loss in light), no more AF and
>even on a tripod, you may be risking blur from the slightest motion. Putting
>a 2x on a zoom such as your 100-300 will lead to soft pictures. I have found
>that enlarging the image in a image editor such as Irfanview will produce
>better results than a 2x on a consumer zoom.
>John

Not to mention that you will loose auto-focus when you zoom as the
light level falls too low for the auto focus to work.

I have a Quantaray 2x and it's okay, but I haven't ever had a shot
from it that I really wanted to show off and the loss of light is a
horrible handicap.


Drifter
"I've been here, I've been there..."

Archived from groups: rec.photo.digital (More info?)

I have used the Tamron SP series with my 70 200 L & 400 L on my 20D and get
excellent results as longs as you remember that your 400mm lens is now a
1280mm lens. Using such large magnification requires different techniques.
This even includes how much weight you place on your lens grip, the type of
tripod head (for instance I get better results when I use a standard 3 way
head as opposed to a ball head). I would suggest that you peruse some of
the shots at the Birds as Art Site and the shooter, Arthur Morris regularly
uses teleconvertors on large lenses. Yes, I loose auto focus but have no
problem with manual focus in most instance where I would wish to use the
lens with the converter. Quality wise, my good shots go to A4 no problems,
with or without the converter, my bad shots go to the trash bin. As a
budget solution its not a bad adjunct to your existing lens.

regards

Don
"Pete D" <no@email.com> wrote in message
news:uDyne.381$F7.135@news-server.bigpond.net.au...
> Agree with what everyone else said, the MC7 and the pro will give
> "acceptable" shots under ideal conditions.
>
> "Frank" <frankp111@comcast.net> wrote in message
> newsv6dnchaRfWo3QPfRVn-jA@comcast.com...
>>I want to use a 2X teleconverter lenses on my Canon SLR digital camera
>> (20D).
>> I have seen three which I have listed below. The price difference
>> between
>> them is really significant. Opinions on any of them would be appreciated.
>> Quantaray-2X AF Teleconverter for EOS $79.95
>> Kenko 2X AF Teleplus MC7 Teleconverter for
>> Canon EOS $125.00
>> Kenko Pro 2X 300 Teleconverter Lens $239.95
>> My lens is a Canon EF 100-300mm f/4-5.6.
>> I assume the Pro 2X 300 is the best, but are the others worth having?
>> Thanks.
>>
>>
>>
>
>