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Author Topic: Extension Tube Detection in DPP for DLO  (Read 1188 times)

Hydrogen

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Extension Tube Detection in DPP for DLO
« on: March 18, 2013, 11:05:01 PM »
Quick question for those of you who have used Kenko extension tubes...

Does DPP pick up the 12mm extension tube as if it were a Canon tube for the purposes of DLO and Lens aberration correction? 

I can understand if it doesn't for the 20mm and 36mm Kenkos, as they are for lengths that have no Canon equivalent.

Thanks - trying to decide whether I go with Kenkos or Canon.
5D Mark III | 1D Mark III | 20D | 17-40L | 24-105L | 70-200 2.8L IS II | 28 f/1.8 | 35 f/1.4L | 50 f/1.4 | 85 f/1.8 | 580ex | 430ex | 420ex

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Extension Tube Detection in DPP for DLO
« on: March 18, 2013, 11:05:01 PM »

Mt Spokane Photography

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Re: Extension Tube Detection in DPP for DLO
« Reply #1 on: March 18, 2013, 11:50:06 PM »
I've never heard of camera detecting extension tubes. 
 
TC's have electronics in them, but all the tubes I've seen merely have wires that pass the contact of the lens to the camera.  The camera never knows that they exist.

Hydrogen

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Re: Extension Tube Detection in DPP for DLO
« Reply #2 on: March 19, 2013, 12:43:45 AM »
You know, you are right.  I just went into DPP and the download/Add Lens Data screen only shows the tele's with TC's, not the ET's.

Thanks!
5D Mark III | 1D Mark III | 20D | 17-40L | 24-105L | 70-200 2.8L IS II | 28 f/1.8 | 35 f/1.4L | 50 f/1.4 | 85 f/1.8 | 580ex | 430ex | 420ex

Mt Spokane Photography

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Re: Extension Tube Detection in DPP for DLO
« Reply #3 on: March 19, 2013, 01:16:09 PM »
The main thing that differentiates different TC's is the accuracy of the machining.  The front and rear mounts need to be very parallel.  Canon goes to extremes to assure this, and you pay the price.  Kenko is also excellent.
 
Then, there are the plastic body tubes from China which may have flimsy mounts that flex and bend.  If you use one rarely and are not hung up on perfection, they are fine.  But, if you want the best quality, get Kenko or Canon.
I've had all three, I ended up selling my Canon set, and later, sold my Kenko set.  I have a cheap Chinese set that I only use to play with once a year or less, and it serves the purpose.
 
Now that I am selling many of my light weight primes and  getting larger zooms, I may pop for Kenko again.  I keep a eye out for used ones on our local Craigslist and have found some deals every few years.

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Re: Extension Tube Detection in DPP for DLO
« Reply #3 on: March 19, 2013, 01:16:09 PM »