Go Back   Steve's Digicams Forums > Digicam Help > Newbie Help

Reply
 
Thread Tools Search this Thread
Old Feb 23, 2010, 5:05 AM   #1
Junior Member
 
Join Date: Feb 2010
Location: England and Spain
Posts: 7
Default Cheap macro extension tubes

Hey hey, a question from a newbie I hope someone can answer. I've just purchased a Canon eos 450d with a 18-55mm lense, and from previous experience I know I want to do some macro shooting. Is something like this appropiate? -> http://cgi.ebay.co.uk/Macro-Extensio...item19b5381f83

I basically have no budget left after buying the camera so the price tag would be perfect... I understand it may not be the best quality but before purhcasing anything like that, I'd love to know what you guys think. Is it even worth it?
soph is offline   Reply With Quote
Sponsored Links
Old Feb 23, 2010, 6:09 AM   #2
Senior Member
 
TCav's Avatar
 
Join Date: Sep 2005
Location: Washington, DC, Metro Area, Maryland
Posts: 13,543
Default

Extension tubes are a great way to do macrophotography on the cheap, but that's just too cheap. Kenko extension tubes are very good. The lesser brands usually don't support autoexposure, and are poorly constructed, resulting in light leaks and difficulty connecting and disconnecting the tube to the lens and the camera body.

The ad states:

"... But they are not meter-coupled. They do not preserve the automatic diaphragm. It should be used with manual lenses with their own aperture dial. There is no electronic connection between the body and the lens. Automatic lenses can be used with their widest open aperture only. ..."

That means you can only use manual exposure, and since your 18-55 doesn't have an aperture ring, the lens can only be used at its largest aperture, so your depth of field will be infinitesimal.

Don't waste your money.
__________________
  • The lens is the thing.
  • 'Full Frame' is the new 'Medium Format'.
  • "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.
TCav is offline   Reply With Quote
Old Feb 23, 2010, 2:47 PM   #3
Junior Member
 
Join Date: Feb 2010
Location: England and Spain
Posts: 7
Default

I thought as much. Thanks so much for the advice! Seems like the proper ones cost around 150 dollars? Goes right on my 'to get' list then, after the 50mm lense.
soph is offline   Reply With Quote
Old Feb 23, 2010, 3:49 PM   #4
Senior Member
 
TCav's Avatar
 
Join Date: Sep 2005
Location: Washington, DC, Metro Area, Maryland
Posts: 13,543
Default

These things often show up used on eBay. Keep your eyes open.
__________________
  • The lens is the thing.
  • 'Full Frame' is the new 'Medium Format'.
  • "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.
TCav is offline   Reply With Quote
Old Feb 23, 2010, 8:04 PM   #5
Senior Member
 
shoturtle's Avatar
 
Join Date: Dec 2009
Location: Frankfurt AM
Posts: 11,348
Default

You can get a kenko or canon 12 tube for about 90 dollars, or a kenko 25 for about 100. They are way better tubes, and will allow you to use aperture priority mode on your shots. It is really worth the extra money if you do not have a dedicated macro lens.

Pro optic has a set made of plastic, it will not AF with EF-s lenses only with EF lenses, but works ok for about 50 dollars. If you are looking for a cheap set of tubes. But it is not a big issue since mf is preferred for macro work anyways.

Or save you pennys and get a ef 50mm 2.5 macro. It does a pretty nice job for a 250 dollar macro lens new and used for about 180 dollars.
__________________
Super Frequent Flyer, no joke. Ex Patriot and loving it.
Canon Eos 60D, T1i/500D, Eos1, Eos 630, Olympus EPL-1, and a part time Pentax K-X shooter.

Last edited by shoturtle; Feb 23, 2010 at 8:34 PM. Reason: typo
shoturtle is offline   Reply With Quote
Old Feb 23, 2010, 8:33 PM   #6
Senior Member
 
TCav's Avatar
 
Join Date: Sep 2005
Location: Washington, DC, Metro Area, Maryland
Posts: 13,543
Default

The Pro-Optic Extension tubes don't fit well, and are prone to light leaks.
__________________
  • The lens is the thing.
  • 'Full Frame' is the new 'Medium Format'.
  • "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.
TCav is offline   Reply With Quote
Old Feb 23, 2010, 8:38 PM   #7
Senior Member
 
shoturtle's Avatar
 
Join Date: Dec 2009
Location: Frankfurt AM
Posts: 11,348
Default

That is why I pointed out that they are plastic, and only work OK.

But if the OP is in a pinch for cash and really want something for now. It may suffice until he can save up for a better tube. During the holidays the pro optic went for about 35 dollars. And you still get to select the aperture. They are actually better then the ebay tube, as he can still set aperture with the pro optic and have AF with a ef 50mm MK II.
__________________
Super Frequent Flyer, no joke. Ex Patriot and loving it.
Canon Eos 60D, T1i/500D, Eos1, Eos 630, Olympus EPL-1, and a part time Pentax K-X shooter.
shoturtle is offline   Reply With Quote
Old Feb 23, 2010, 8:39 PM   #8
Senior Member
 
VTphotog's Avatar
 
Join Date: Mar 2005
Location: Extreme Northeastern Vermont, USA
Posts: 4,214
Default

Light leaks? That is why duct tape comes in black, too.

brian
VTphotog is online now   Reply With Quote
Old Feb 24, 2010, 5:54 AM   #9
Senior Member
 
TCav's Avatar
 
Join Date: Sep 2005
Location: Washington, DC, Metro Area, Maryland
Posts: 13,543
Default

So "... don't fit well, and are prone to light leaks." equals "OK"?
__________________
  • The lens is the thing.
  • 'Full Frame' is the new 'Medium Format'.
  • "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.
TCav is offline   Reply With Quote
Old Feb 24, 2010, 8:27 AM   #10
Senior Member
 
shoturtle's Avatar
 
Join Date: Dec 2009
Location: Frankfurt AM
Posts: 11,348
Default

Some people find that they work ok, I actually know someone that use them on a XTi, and it does a OK job. So yes depending on how good a set you get, it is okay.
__________________
Super Frequent Flyer, no joke. Ex Patriot and loving it.
Canon Eos 60D, T1i/500D, Eos1, Eos 630, Olympus EPL-1, and a part time Pentax K-X shooter.
shoturtle is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 1:35 AM.