A Photography forum. PhotoBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » PhotoBanter.com forum » Photo Equipment » 35mm Photo Equipment
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Extention Tubes... What's the difference?



 
 
Thread Tools Display Modes
  #1  
Old July 6th 04, 04:07 AM
skymuffins
external usenet poster
 
Posts: n/a
Default Extention Tubes... What's the difference?

I plan on purchasing some extention tubes for my Canon D-Reb. The Canon 12
& 25mm tubes are about $80 & $130 each. Kenko offers a set of 3 for $120.
Is there going to be any noticeable difference? It is just a hunk of metal
w/ no glass right?

I would also like to get a Sigma 1.4x TC to use with my non-"L" lenses.

Anyone out there own any of these?

Thanks for the help.

- Harrison



  #2  
Old July 6th 04, 05:57 AM
dslr
external usenet poster
 
Posts: n/a
Default Extention Tubes... What's the difference?

skymuffins wrote:
I plan on purchasing some extention tubes for my Canon D-Reb. The
Canon 12 & 25mm tubes are about $80 & $130 each. Kenko offers a set
of 3 for $120. Is there going to be any noticeable difference? It is
just a hunk of metal w/ no glass right?


Basically, yes.

However, do you have the "kit" EF-S mount lens for the DRebel? Check that it
will fit the Kenkos, I suspect it ought to as thee is nothing inside the
tubes to obstruct it, but do make sure before buying. I'm not sure what the
mechanism is to prevent it being fitted to non-EF-S cameras.

--
regards,
dslr


  #3  
Old July 6th 04, 06:17 AM
skymuffins
external usenet poster
 
Posts: n/a
Default Extention Tubes... What's the difference?


"dslr" wrote in message
...
skymuffins wrote:
I plan on purchasing some extention tubes for my Canon D-Reb. The
Canon 12 & 25mm tubes are about $80 & $130 each. Kenko offers a set
of 3 for $120. Is there going to be any noticeable difference? It is
just a hunk of metal w/ no glass right?


Basically, yes.

However, do you have the "kit" EF-S mount lens for the DRebel? Check that

it
will fit the Kenkos, I suspect it ought to as thee is nothing inside the
tubes to obstruct it, but do make sure before buying. I'm not sure what

the
mechanism is to prevent it being fitted to non-EF-S cameras.


I wouldn't think anything would obstruct the Ext tubes as they are hollow.
I know that the Canon Teleconverters must be used with "L" lenses of 135mm
and above due to the offset of the optical elements... the protrude into the
lens by about 1/4" or so. I don't think that is a problem with the Sigma TC
though. I'm not too concerned if the Sigma TC works with my kit lens or
not. I want it to work with the 75-300mm and 28-135mm. It those work, I'll
be in good shape waiting for my 300mm f/4 IS to arrive in August. I'll get
a Canon 1.4x TC for that.

- Harrison


  #4  
Old July 6th 04, 07:01 AM
Tony Spadaro
external usenet poster
 
Posts: n/a
Default Extention Tubes... What's the difference?

Go with the Kenko TC - The Pro 300 is the best third party 1.4 and 2x TC
I've ever used. Remember TCs are not designed for wide angle or normal focal
length lenses. You might also test carefully if you have and rear focusing
lenses.
The Sigma TC will have compatibility problems.
As far as I or anyone I've talked to can tell, the Kenko tubes will do
jes'fine.

--
http://www.chapelhillnoir.com
home of The Camera-ist's Manifesto
The Improved Links Pages are at
http://www.chapelhillnoir.com/links/mlinks00.html
A sample chapter from my novel "Haight-Ashbury" is at
http://www.chapelhillnoir.com/writ/hait/hatitl.html
"skymuffins" wrote in message
...
I plan on purchasing some extention tubes for my Canon D-Reb. The Canon

12
& 25mm tubes are about $80 & $130 each. Kenko offers a set of 3 for $120.
Is there going to be any noticeable difference? It is just a hunk of

metal
w/ no glass right?

I would also like to get a Sigma 1.4x TC to use with my non-"L" lenses.

Anyone out there own any of these?

Thanks for the help.

- Harrison





  #5  
Old July 6th 04, 07:39 AM
Tony Parkinson
external usenet poster
 
Posts: n/a
Default Extention Tubes... What's the difference?

"skymuffins" wrote in message
...
I plan on purchasing some extention tubes for my Canon D-Reb. The Canon

12
& 25mm tubes are about $80 & $130 each. Kenko offers a set of 3 for $120.
Is there going to be any noticeable difference? It is just a hunk of

metal
w/ no glass right?

I would also like to get a Sigma 1.4x TC to use with my non-"L" lenses.

Recently purchased a set of TriPlus Extension tubes (same as Kenko but
different name on the side). They work just fine with my EOS50E and I'm
quite happy with the image quality. I doubt the Canon air is any better
optically than the Kenko or TriPlus air.

Can't help with the Sigma TC as I don't have one, however, my opinions of
Sigma in general are well documented in this forum


  #6  
Old July 6th 04, 03:21 PM
dslr
external usenet poster
 
Posts: n/a
Default Extention Tubes... What's the difference?

skymuffins wrote:
"dslr" wrote in message
...
skymuffins wrote:
I plan on purchasing some extention tubes for my Canon D-Reb. The
Canon 12 & 25mm tubes are about $80 & $130 each. Kenko offers a set
of 3 for $120. Is there going to be any noticeable difference? It
is just a hunk of metal w/ no glass right?


Basically, yes.

However, do you have the "kit" EF-S mount lens for the DRebel? Check
that it will fit the Kenkos, I suspect it ought to as thee is
nothing inside the tubes to obstruct it, but do make sure before
buying. I'm not sure what the mechanism is to prevent it being
fitted to non-EF-S cameras.


I wouldn't think anything would obstruct the Ext tubes as they are
hollow. I know that the Canon Teleconverters must be used with "L"
lenses of 135mm and above due to the offset of the optical
elements... the protrude into the lens by about 1/4" or so. I don't
think that is a problem with the Sigma TC though. I'm not too
concerned if the Sigma TC works with my kit lens or not. I want it
to work with the 75-300mm and 28-135mm. It those work, I'll be in
good shape waiting for my 300mm f/4 IS to arrive in August. I'll get
a Canon 1.4x TC for that.


Nothing will obstruct the light path, as you say they are hollow.
However, there is "something" in the EF-S mount to prevent an EF-S lens
being fitted to an incompatible camera (i.e anything other than a DRebel
atm). That may also apply to the tubes - do check before buying.

--
regards,
dslr


  #7  
Old July 7th 04, 05:21 AM
skymuffins
external usenet poster
 
Posts: n/a
Default Extention Tubes... What's the difference?

Tony Spadaro wrote:
Go with the Kenko TC - The Pro 300 is the best third party 1.4 and 2x TC
I've ever used. Remember TCs are not designed for wide angle or normal focal
length lenses. You might also test carefully if you have and rear focusing
lenses.
The Sigma TC will have compatibility problems.
As far as I or anyone I've talked to can tell, the Kenko tubes will do
jes'fine.


A good point indeed. Both of my lenses have a rear focusing element.
Neither extends beyond the bayonett mount though. I will certainly keep
that in mind

Thanks Tony

- Harrison
  #8  
Old July 7th 04, 06:05 AM
Tony Spadaro
external usenet poster
 
Posts: n/a
Default Extention Tubes... What's the difference?

Check very carefully. Usually teles are ok and you really don't want to use
a TC with a wide angle anyway. If budget doesn't allow for the Pro 300 I've
used the next model down (MC-7 in 2x and I think MC-4 in 1.4x) for yearsa
and they are pretty good. I think the Tamron SP TCs are the saem as these
Kenkos.

--
http://www.chapelhillnoir.com
home of The Camera-ist's Manifesto
The Improved Links Pages are at
http://www.chapelhillnoir.com/links/mlinks00.html
A sample chapter from my novel "Haight-Ashbury" is at
http://www.chapelhillnoir.com/writ/hait/hatitl.html
"skymuffins" wrote in message
...
Tony Spadaro wrote:
Go with the Kenko TC - The Pro 300 is the best third party 1.4 and 2x TC
I've ever used. Remember TCs are not designed for wide angle or normal

focal
length lenses. You might also test carefully if you have and rear

focusing
lenses.
The Sigma TC will have compatibility problems.
As far as I or anyone I've talked to can tell, the Kenko tubes will do
jes'fine.


A good point indeed. Both of my lenses have a rear focusing element.
Neither extends beyond the bayonett mount though. I will certainly keep
that in mind

Thanks Tony

- Harrison



  #9  
Old July 7th 04, 02:49 PM
skymuffins
external usenet poster
 
Posts: n/a
Default Extention Tubes... What's the difference?

I will go with the Kenko then. I am getting the Canon 300mm f/4L IS in
August, I plan on purchasing the canon 1.4xTC for that. Canon's own TC is
only compatible with "L" glass above 135mm. I only need this TC for my
28-135mm and my 75-300mm lenses.

Thanks again!

"Tony Spadaro" wrote in message
.com...
Check very carefully. Usually teles are ok and you really don't want to

use
a TC with a wide angle anyway. If budget doesn't allow for the Pro 300

I've
used the next model down (MC-7 in 2x and I think MC-4 in 1.4x) for yearsa
and they are pretty good. I think the Tamron SP TCs are the saem as these
Kenkos.

SNIP
A good point indeed. Both of my lenses have a rear focusing element.
Neither extends beyond the bayonett mount though. I will certainly keep
that in mind

Thanks Tony

- Harrison





 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Extension tubes Nelkahn 35mm Photo Equipment 7 July 3rd 04 02:22 AM
difference, fuji frontier 350 and new 355? jaekim Film & Labs 2 June 28th 04 11:21 PM
Kenko extension tubes Nelkahn Digital Photography 0 June 28th 04 10:16 PM
Difference Malcolm Downes General Photography Techniques 1 February 22nd 04 09:47 PM
Close-up Photography with Extension Tubes Tim Mathers Photographing Nature 0 November 27th 03 01:19 PM


All times are GMT +1. The time now is 10:58 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 PhotoBanter.com.
The comments are property of their posters.