Gear I have (or don't have and say, would like to have):
Lenses, filters and adapters:
  Lens/filter/adapter    Filter size | Lens/filter/adapter  Filter size
  Canon 100mm f/2.8L         67f     | Canon EF-M 22mm f/2      43f
  Canon 180mm f/3.5L         72f     | Canon EF-M 18-55mm       52f
  Canon 50mm f/1.4           58f     | Canon EF-S 10-22mm       77f
  Canon 24-105L              77f     | CP & ND                  77m
  Raynox 250 (probably have) see->   | Raynox 150 (seems recommended a lot)
      Raynox: 43m rear 49f front  The snap-on fits 52-67mm
  Nikon CFI Plan Achromat 10x NA 0.25 WD 10.5mm with M25x0.75  x 52mm [1] 52m
  Mitutoyo (Edmund)       10x NA 0.28 WD 33.5mm with M26x36tpi x 52mm [2] 52m

Extenders:
  Canon EF 12 II Extension Tube
  Canon EF 25 II Extension Tube
  Canon EF 1.4x Extender

Rings:
  52m - 43f                        52(h) $34 - ordered 3/9/2014
  (67m, 72m) - 52f                 67(h), 72(h)
  (43m, 52m) - 58f                 43(b), 52(b)
  (58m, 72m, 77m) - 67f            58(b), 72(cheap), 77(cheap)
  (52m, 58m, 62m, 67m, 72m) - 77f  52(cheap), 58(h), 62(b), 67(b), 72(b)
  67m - 67m (macro coupler)        67(cheap)
  52m-M25x0.75  (this is the adapter for [1])
  52m-M26x36tpi (this is the adapter for [2])
  EF - 58m      (58mm Macro Reverse Ring Camera Mount Adapter)
  EF - 77m      (77mm Macro Reverse Ring Camera Mount Adapter)

Configurations:
  EF-77m => 10-22mm (reversed)
  EF-58m => 50mm (reversed)
  100mm => 67m-67m => 67f-43m => 22mm ----------------- The 67-43 was 6-8 wk delayed
  100mm => 67m-67m => 67f-58m => 58f-43m => 22mm -- So, do instead
  100mm => 67m-67m => 67f-58m => 50mm
  100mm => 67m-67m => 67f-77m => 10-22mm
  100mm => 67m-52f => 52m-M25x0.75 => Nikon 10x
  100mm => 67m-52f => 52m-M26x36tpi => Mitutoyo 10x
  100mm => 67m-52f => 52m-43f => Raynox 250
  180mm => 72m-67f => 67m-67m => 67f-43m => 22mm ------ The 67-43 was 6-8 wk delayed
  180mm => 72m-67f => 67m-67m => 67f-58m => 58f-43m => 22mm -- So, do instead
  180mm => 72m-67f => 67m-67m => 67f-58m => 50mm
  180mm => 72m-67f => 67m-67m => 67f-77m => 10-22mm
  180mm => 72m-52f => 52m-M25x0.75 => Nikon 10x
  180mm => 72m-52f => 52m-M26x36tpi => Mitutoyo 10x
  180mm => 72m-52f => 52m-43f => Raynox 250

Magnifications:
  T2i - 50mm reversed            1x?
  T2i - 10-22mm reversed         lots?
  T2i - 100mm                    1x
  T2i - 180mm                    1x
  T2i - 100mm - 50mm reversed    2x
  T2i - 180mm - 50mm reversed    3.6x
  T2i - 100mm - Nikon 10x        5x
  T2i - 180mm - Nikon 10x        9x
  T2i - 100mm - 10-22mm reversed 10x(?)


DOF & #shots:
  Per this post
    you need a little overlap, say 20-30%, between the in-focus slabs of adjacent frames
  Determining number of shots for a stack?
  DOF Calculator, another
    
Hardware:
  Nice looking breadboard
  Nice looking rig w/ details
  Raynox rig
  Bratcam - ultimate in positioning

Benchmark:

Dimensions:
  Configurations
  Resolution
  Contrast

Tools:
  Remote:
    EOS Utility, Zerene Remote, MikesStepperApp w/ Canon SDK on Mac,
    w/libgphoto2 & gphoto2 on Linux
  Camera's focus control, StackShot
  Zerene Stacker

  [1] For the Nikon CFI Plan Achromat 10x NA 0.25 WD 10.5mm (p/n MRL00102)
      reviewed here and here
  [2] For the Mitutoyo 10x NA 0.28 WD 33.5mm used here and here - WD of 33.5 mm
  [1] vs [2]
  

       Nikon 10x vs Mitutoyo 10x
(discussed here) 
     		
       Nikon 5x vs Mitutoyo 5x
(discussed here)
Cleaning:
    Acetone for 3 days
Stepsize:
    DOF Estimates For Macro/Micro
    on DOF and Step Size
Mitutoyo is specifying single-sided DOF = maximum deviation from the plane of sharpest focus, as opposed to the two-sided DOF that we want for focus stacking and is computed by Nikon
...
So what step size should you use? Well, it depends. If you plan to stack using PMax, then you can get a sharper rendering "out of the box" by using a smaller step and letting PMax do some sharpening for you as a side effect. Or if stack depth is important, you can take Nikon's smallest number and cut it back by 20% or so to be sure of not missing anything.
    A new way of thinking and calculating about DOF
    Overview of Microscope objectives DoF
StackShot:
    Fine focusing a microscope using StackShot
        -> Tiny focus steps: how to make them, how to measure them
    Irregular Steps - StackShot
    What does StackShot "High Precision" mean?

    Stackshot and 1 micron steps: - bottom of initial post
When scrolling through images there is consistent evidence of nutation [nodding] from frame to frame. It's very consistent: one frame slightly to the left and the other back again. So consistent that away from the centre and perpendicular to the direction of nutation the trails from "stuck pixels” in the stack form two parallel tracks like this:
    Tiny focus steps: how to make them, how to measure them
    [Zerene] StackShot Controller Interface
    Is it better to use a focus rail or the ring on my lens?
Post Processing:
    Suppress DMap artifacts with editing cheat [Zerene]
Camera:
    Canon “Live-View” with an electronic first shutter curtain
Wireless to Camera:
    Wirelessly tethering Nikon D4 using a sub 50 Euro mini WLAN router
        Portable Battery Powered 3G/4G Wireless N Router: TL-MR3040
Reusing StackShot:
    StackShot controller incorporated
Slabbing:
    Sub-stacks
    SlabberJockey slabbing (sub-stacking) utility
    Suppress DMap artifacts with editing cheat
EOS Control:
    canon-eos-cameras-principles-of-interfacing-and-library-description
    ptpusb-control-camera-data
    digital-camera-control-using-arduino-usb-host-shield-part-1-basics
3D:
    3D scan of fly head
    MeshLab