DPChallenge: A Digital Photography Contest You are not logged in. (log in or register) 
 

DPChallenge Forums >> Photography Discussion >> Question on extension tubes
Pages:  
Showing posts 1 - 8 of 8, (reverse)
AuthorThread
 03/06/2007 09:51:50 AM · #1
Hi everyone,

I am looking for information on how to use extension tubes, what kind to purchase for a 20d and what tubes work with what cannon lenses. Any information will greatly be appreciated.

Thanks
Rich
 03/06/2007 10:00:26 AM · #2
I'm not a Canon man but...

An extention tube simply moves your lens a greater distance from your sensor. The effect being that you MUST get closer to your subject in order to focus. This in effect, allows "macro" type shots to be taken.

There are two types...the cheap version $5 - $30 on ebay. This version strips your camera and lens of the ability to communicate which means that you are on full manual when you are shooting. I happen to like this b/c my experinece with macro shows that you need greater control of your functions when shooting macro.

The higher prices version can cost up and over $100 allows all functions of the camera to be used...full auto if you want it.

Well that's about all I have for ya!

Message edited by author 2007-03-06 10:00:44.
 03/06/2007 10:21:31 AM · #3
I have a Kenko set of three. I've used them on my wide angle lens to get super macros and on my 100-400 to get interesting abstracts of common objects.

They run around $125 CDN and are great fun to play around with.



Message edited by author 2007-03-06 10:23:06.
 03/06/2007 10:26:05 AM · #4
Originally posted by kenskid:
I'm not a Canon man but...

An extention tube simply moves your lens a greater distance from your sensor. The effect being that you MUST get closer to your subject in order to focus. This in effect, allows "macro" type shots to be taken.

There are two types...the cheap version $5 - $30 on ebay. This version strips your camera and lens of the ability to communicate which means that you are on full manual when you are shooting. I happen to like this b/c my experinece with macro shows that you need greater control of your functions when shooting macro.

The higher prices version can cost up and over $100 allows all functions of the camera to be used...full auto if you want it.

Well that's about all I have for ya!


Unfortunately, with the EOS cameras, the first type leaves you no way to stop down the lens, so all shots would have to be wide open. Not so good.

I have the Kenko set. It will work with all lenses, but I find it best with my 85mm f1.8. You can use it with any EOS mount lens and it allows aperture control and AF, however, there are a couple of things you should remember. The light falloff due to the extension tube will require compensation and, the longer the lens you use with the extension tube, the smaller the effect of the tube.

With a wide angle lens, it is entirely possible to move the entire range of focus to within the lens itself. A curious thing, but not really useful. The tubes seem to work best with lenses in the 35mm-85mm range.

They can also be useful on long tele lenses to allow closer focusing since some of the longer lenses may not focus any closer than, say 15' or so, and that may not be enough for smaller wildlife.

03/06/2007 12:23:52 PM · #5
I have the Canon EF-25 II. A buddy of mine (another photog on this site) gave it to me for Xmas and I haven't had the chance to play with it much, but from what I've seen - it rocks.

I've only used it once, but it resulted in this 7th place entry:


Taken with a 70-200 2.8 IS from about 1' away.
:O)
 03/06/2007 12:48:15 PM · #6
Thanks for the many replies, these sound good! do places like ritz normally stock these or are they like a special order type deal?

Thanks again,
Rich
 03/06/2007 12:58:56 PM · #7
Online you can get them at Ritz or B&H....You would do much better on ebay. I got one in perfect condition for about $15.

Originally posted by Hot_Pixel:
Thanks for the many replies, these sound good! do places like ritz normally stock these or are they like a special order type deal?

Thanks again,
Rich

03/06/2007 01:28:17 PM · #8
Originally posted by cpanaioti:
I have a Kenko set of three. I've used them on my wide angle lens to get super macros and on my 100-400 to get interesting abstracts of common objects.

They run around $125 CDN and are great fun to play around with.



I also have the Kenko set of three, they're very versatile. I used them stacked on my Nikkor Micro 60 mm to get this super-macro of a minute drop, dropped from a pipette onto a water surface. The drop balances (if you're lucky) for a fraction of a second on the surface before passing through.

Pages:  
Current Server Time: 09/04/2025 07:47:09 PM

Please log in or register to post to the forums.


Home - Challenges - Community - League - Photos - Cameras - Lenses - Learn - Help - Terms of Use - Privacy - Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 09/04/2025 07:47:09 PM EDT.