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DPChallenge Forums >> Hardware and Software >> macro lens for rebel xt
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Showing posts 26 - 42 of 42, (reverse)
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 03/30/2006 07:02:20 PM · #26
Originally posted by kirbic:
Sweeet slippy! Try the 100/2.8 as a "normal" lens for some candid portraits, wide open, and you will be awed.

I guess you might especailly recommend candids of Toucans, har har har. ;-)
 03/30/2006 07:06:24 PM · #27
Originally posted by Strikeslip:
Originally posted by kirbic:
Sweeet slippy! Try the 100/2.8 as a "normal" lens for some candid portraits, wide open, and you will be awed.

I guess you might especailly recommend candids of Toucans, har har har. ;-)


Certainly! And you toucan do it! :-P
 03/30/2006 07:21:46 PM · #28
well those extension tubes work with any lens or do you have to buy specific ones for your lens brand or type?
 03/30/2006 07:31:31 PM · #29
Originally posted by goldenhawkofky:
well those extension tubes work with any lens or do you have to buy specific ones for your lens brand or type?


They are mount specific, so you need to get the ones built for the Canon mount. The Kenko tubes are the ones many folks go with.
03/30/2006 07:33:39 PM · #30
Here's a picture of our dog that I took with my Canon 60mm macro:


03/30/2006 07:37:25 PM · #31
Originally posted by kirbic:
Originally posted by goldenhawkofky:
well those extension tubes work with any lens or do you have to buy specific ones for your lens brand or type?


They are mount specific, so you need to get the ones built for the Canon mount. The Kenko tubes are the ones many folks go with.


I knew you would have to use the one built for your specific camera mount, I just did not want to screw up a lens or buy something that would not work.

Is a teleconverter lens specific?
 03/30/2006 07:40:40 PM · #32
Originally posted by goldenhawkofky:
Is a teleconverter lens specific?


The Canon teleconverters are. Some others may be. The Canon ones, in particular, fit mostly L lenses above 70mm. Canon does have a table of compatibility for theirs.
My tamron 1.4x (non Pro version) on the other hand, fits pretty much all my Canon lenses. What they do and don't work with varies from converter to converter :-P

Edit:
When using the Canon converters, putting a 12mm extension tube betweenthe converter and the lens eliminates the mechanical interference problems, so for instance I can use the Canon 2.0xII converter with the (normally-incompatible) 100/2.8 Macro to achieve >2:1 magnification.

Message edited by author 2006-03-30 19:42:09.
 03/30/2006 07:47:00 PM · #33
I got my hands on a XT and a Sigma 75-300mm with macro function a week ago. Great lense, and gives you and extensive use range. I know you're probably not looking to purchaise a lense with that much range, but i was extreamly happy! and again, extreamly noise using auto because of the lack of USM ;-) but really, affordable, you should give it a look
 03/30/2006 07:56:20 PM · #34
Originally posted by kirbic:
The Kenko tubes are the ones many folks go with.


Will using the Kenko tubes allow you to retain autofocus?
what is the advantage of having either a 12mm or 25mm tube?
 03/30/2006 07:59:43 PM · #35
Originally posted by goldenhawkofky:
Originally posted by kirbic:
The Kenko tubes are the ones many folks go with.


Will using the Kenko tubes allow you to retain autofocus?
what is the advantage of having either a 12mm or 25mm tube?


Yes, AF will still be possible. Practical? That's another matter. At high magnifications, it's much better to set the focus to set the magnification desired, then move the camera back & forth to focus.
The more tube length you add, the closer you're able to focus and the higher the magnification will be. You can stack two or even all three tubes together; the three tubes give you a lot of possible combinations of different total lengths.
 03/30/2006 08:02:48 PM · #36
Tamron SP90. I am VERY happy with it. I can post full size if interested.



Pretty much straight from camera


Levels, USM, crop


Edited just to edit.

Message edited by author 2006-03-30 20:04:06.
 03/30/2006 08:05:32 PM · #37
Sigma 180 f3.5 is pretty good (cannot afford one myself) the Tamron 90 I have heard great thinga about but for me the Sigma 105 says it all. amazing quality, cheap, reliable, fast.. what more do you need
 03/30/2006 08:07:06 PM · #38
Originally posted by kirbic:

Yes, AF will still be possible. Practical? That's another matter. At high magnifications, it's much better to set the focus to set the magnification desired, then move the camera back & forth to focus.
The more tube length you add, the closer you're able to focus and the higher the magnification will be. You can stack two or even all three tubes together; the three tubes give you a lot of possible combinations of different total lengths.


Can you use a tube with a macro lens? would this be an advantage?

I really appreciate your patience and help I always have alot of questions. Ignorance is not bliss to me its just a pain my rear.
 03/30/2006 08:07:06 PM · #39
There's a problem with Kenko tubes, for the record.

From: //www.thkphoto.com/products/kenko/slrc-04.html

"3. Canon EF-S lenses will not mount on the KENKO DG Extension Tube Set. These lenses include but not limited to EF-S 10-22, EF-S 17-85, EF-S 18-55, and EF-S 60mm Macro. "

I bought the much cheaper Prooptic tubes and they are fine, and support the EF-S lenses.
 03/30/2006 08:14:36 PM · #40
Originally posted by goldenhawkofky:
Can you use a tube with a macro lens? would this be an advantage?

I really appreciate your patience and help I always have alot of questions. Ignorance is not bliss to me its just a pain my rear.


Yes. When you need more magnification than 1:1, you can add an extension tube to a macro lens. Works great. Here...

...is a chart showing how magnification is affected using the Canon 100/2.8 Macro lens and various combinations of accessories. As you can see, with a 12mm and 25mm tube, you can get 1.5:1, which ain't too shabby.
 03/30/2006 08:21:41 PM · #41
Originally posted by kirbic:
Here...

...is a chart showing how magnification is affected using the Canon 100/2.8 Macro lens and various combinations of accessories. As you can see, with a 12mm and 25mm tube, you can get 1.5:1, which ain't too shabby.


Thanks!
 03/31/2006 07:40:19 AM · #42
Originally posted by kirbic:
When you need more magnification than 1:1, you can add an extension tube to a macro lens. Works great. Here...

...is a chart showing how magnification is affected using the Canon 100/2.8 Macro lens and various combinations of accessories. As you can see, with a 12mm and 25mm tube, you can get 1.5:1, which ain't too shabby.

I'm probably going to pick up some extension tubes eventually. I'm pretty excited to do some extreme macros when the weather gets nice.

This thread has been really helpful for me. Thanks for all the great info, Kirbic. I really appreciate it.
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