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How much space to get to macro?

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EOBeav:
So, here's the deal. I'd like to create a DIY extension tube to use my 50mm f/1.4 as a macro lens. How much additional space will I need to create to make that happen? I see that Canon has a couple of electronic ones for sale, more than what I want to spend on one, but I'm not sure of the math calculations involved to get to the point of using it as a macro. I understand this won't utilize AF, and will be strictly MF, but I'm ok with that. Thanks in advance for whatever advice you can give.

kdsand:

--- Quote from: EOBeav on July 03, 2012, 05:11:29 PM ---So, here's the deal. I'd like to create a DIY extension tube to use my 50mm f/1.4 as a macro lens. How much additional space will I need to create to make that happen? I see that Canon has a couple of electronic ones for sale, more than what I want to spend on one, but I'm not sure of the math calculations involved to get to the point of using it as a macro. I understand this won't utilize AF, and will be strictly MF, but I'm ok with that. Thanks in advance for whatever advice you can give.

--- End quote ---
At some point (a month ago?) Some where (Adorama - B&H?) I saw several new adjustable bellows. I think they were fairly inexpensive .....
 Vague I know. Sorry.  :D

wickidwombat:
why bother trying to make it yourself ebay have dirt cheap ones.

http://www.ebay.com.au/itm/Macro-Extension-Tube-lens-Ring-Canon-EOS-60D-1100D-550D-600D-1000D-500D-50D-/320876610897?pt=AU_Lenses&hash=item4ab5bc8551

problem with these is they are dumb so you have no aperture control or AF or exif data

i have these which give you full aperture control, AF and all exif data
http://www.ebay.com.au/itm/Brand-New-Kenko-12mm-20mm-36mm-Auto-Extension-Tube-Set-DG-Canon-EF-EF-S-/221057255169?pt=AU_Cameras_Photographic_Accessories&hash=item33780a0701

I have also seen these new ones that they claim work too but are much cheaper than the kenko
I havent used them though
http://www.ebay.com.au/itm/Auto-Focus-Macro-Extension-Tube-CANON-EOS-EF-EF-S-/320721870136?pt=AU_Lenses&hash=item4aac835d38
since there are no optics all you really need is the electronics to control aperture etc

Mt Spokane Photography:
I second buying a cheap one.  Here is a set of three for under $7 with free shipping.
 
Manual Version: $7
 
  http://www.ebay.com/itm/For-Canon-EOS-EF-Camera-Macro-Extension-Tube-Ring-Adapters-/300667737264?pt=LH_DefaultDomain_0&hash=item46013194b0
 
There are no electronics in the ones which support AF, just a direct pass thru of the circuits.  I paid $25 for mine a few years back, but the price has gone up.
 
Autofocus version: $43
 
http://www.ebay.com/itm/Auto-Focus-Macro-Extension-Tube-Set-For-Canon-EOS-EF-EF-S-DSLR-Camera-/220925737551?pt=LH_DefaultDomain_0&hash=item3370333a4f

EOBeav:
Aw, come on guys, where's your sense of fun? I have a seldom-used Lensbaby that I'm going to cannibalize to get the correct bayonet fitting, and some left over black PVC pipe from a home project that's just about the right diameter to get the job done. I'm just wondering how much space I'll need, but I'll figure it out.

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