Greetings,
I don't know if You were interested but I wished to share with all of You Cornerfix profile for my favorite Hologon with NEX-7. I don't know if You have already heard about CornerFix software and problem with symmetrical wide angle lenses and digital sensors. Due to short back focal distance this type of lenses were always limited to mirrorless cameras (mainly rangefinder of previous days). More information about it You may find in monography of Carl Zeiss wide angle's lenses by Dr Nasse ([url]http://blogs.zeiss.com/photo/en/wp-content/uploads/2011/12/en_CLB41_Nasse_LensNames_Distagon.pdf).

Profile's photo before and after processing with Cornerfix You may find here:
http://www.zeissimages.com/gallery/1155/med_U1155I1365971118.SEQ.0.jpg

http://www.zeissimages.com/gallery/1155/med_U1155I1365971131.SEQ.1.jpg

Sample photo processed this profile:
http://www.zeissimages.com/gallery/1155/med_U1155I1365973166.SEQ.0.jpg

http://www.zeissimages.com/gallery/1155/med_U1155I1365971143.SEQ.2.jpg

I made many trials to create this profile and finally I believe that results have been already acceptable. You may download it here:
[url]http://www.fileswap.com/dl/HKMb9fZN2G/ or here: [url]http://fauxtoreal.com/?p=1027
(I don't know how to share other files than jpg, so You I may paste it inline: )

[i][s]/*Start of file*/[/s]

profile_version 1
cornerfix_version 1.4.2.1
description ""
creator ""
copyright ""
licence "This work is licensed under the Creative "
licence "Commons Attribution 3.0 License. To view a copy of this license, "
licence "visit http://creativecommons.org/licenses/by/3.0/ or send a letter "
licence "to Creative Commons, 171 Second Street, Suite 300, San Francisco, "
licence "California, 94105, USA."
LeftHorizonal 0 equation 14 1.000000e+000 -3.060260e-004 -2.926000e-006 -9.215629e-009 -1.534063e-011 -1.442880e-014 -7.982155e-018 -2.572551e-021 -4.465955e-025 -3.226749e-029
RightHorizonal 0 equation 13 1.000000e+000 -4.476228e-004 2.363850e-006 -5.969817e-009 7.348286e-012 -4.976698e-015 1.871710e-018 -3.660467e-022 2.905670e-026
TopVertical 0 equation 12 1.000000e+000 -2.379304e-005 -1.067754e-006 4.063662e-009 -6.577910e-012 4.866349e-015 -1.701927e-018 2.307794e-022
BottomVertical 0 equation 4 1.000000e+000 -1.453987e-007 -1.977080e-013 1.206680e-019 -2.679745e-026 2.115382e-033
color 0 equation 11 1.000000e+000 1.068412e-004 -1.206884e-007 -1.008200e-010 -8.631583e-014 -2.983187e-017 -3.319830e-021
BottomRight 0 equation 6 1.000000e+000 -1.596282e-007 1.009372e-014 1.806529e-021 -9.027118e-028 1.395168e-034 -9.233639e-042 2.235803e-049
TopRight 0 equation 14 1.000000e+000 -1.798280e-004 5.251812e-007 -1.351000e-009 1.705923e-012 -1.277392e-015 5.587820e-019 -1.386815e-022 1.804144e-026 -9.524511e-031
BottomLeft 0 equation 15 1.000000e+000 -1.992208e-004 -1.025825e-006 -1.146644e-009 -2.161387e-013 9.803835e-016 1.180312e-018 6.330067e-022 1.818824e-025 2.717147e-029 1.659988e-033
center 0 location -10 -58
LeftHorizonal 1 equation 14 1.000000e+000 5.282682e-005 -1.189994e-006 -4.890649e-009 -9.131691e-012 -9.102576e-015 -5.238670e-018 -1.742541e-021 -3.106127e-025 -2.294880e-029
RightHorizonal 1 equation 13 1.000000e+000 -3.747244e-004 1.631895e-006 -3.835985e-009 4.582880e-012 -3.142665e-015 1.214172e-018 -2.438084e-022 1.976747e-026
TopVertical 1 equation 12 1.000000e+000 -7.328441e-005 -8.325247e-007 3.641096e-009 -6.577556e-012 5.236953e-015 -1.929814e-018 2.717046e-022
BottomVertical 1 equation 12 1.000000e+000 1.535291e-004 -1.512543e-006 4.409816e-009 -6.876038e-012 5.113051e-015 -1.789499e-018 2.394432e-022
color 1 equation 12 1.000000e+000 1.031944e-004 -3.010891e-007 -5.730491e-010 -5.744270e-013 -2.613198e-016 -5.433329e-020 -4.254266e-024
BottomRight 1 equation 4 1.000000e+000 -1.338192e-007 -9.349194e-015 3.078568e-021 -2.230129e-028 5.349894e-036
TopRight 1 equation 13 1.000000e+000 -1.506994e-005 -4.496843e-007 1.019957e-009 -1.176168e-012 6.405785e-016 -1.774731e-019 2.435740e-023 -1.310736e-027
BottomLeft 1 equation 16 1.000000e+000 -4.024746e-005 3.427458e-007 4.648157e-009 1.285460e-011 1.819885e-014 1.527982e-017 8.037900e-021 2.679271e-024 5.500456e-028 6.349235e-032 3.154861e-036
center 1 location -31 -64
LeftHorizonal 2 equation 14 1.000000e+000 -1.287837e-004 -2.038435e-006 -6.811031e-009 -1.160338e-011 -1.104678e-014 -6.190817e-018 -2.025983e-021 -3.575784e-025 -2.627077e-029
RightHorizonal 2 equation 15 1.000000e+000 1.957052e-004 -2.291987e-006 8.992764e-009 -1.873912e-011 2.242773e-014 -1.636331e-017 7.381563e-021 -2.007104e-024 3.013681e-028 -1.919612e-032
TopVertical 2 equation 13 1.000000e+000 4.874513e-004 -4.462305e-006 1.474401e-008 -2.535673e-011 2.337062e-014 -1.184569e-017 3.131028e-021 -3.382916e-025
BottomVertical 2 equation 11 1.000000e+000 -9.049134e-005 -2.162743e-007 7.621079e-010 -1.388634e-012 8.398751e-016 -1.638391e-019
color 2 equation 14 1.000000e+000 -1.888505e-005 -8.132539e-007 -1.954717e-009 -2.748608e-012 -2.180986e-015 -1.017239e-018 -2.771573e-022 -4.076186e-026 -2.496665e-030
BottomRight 2 equation 6 1.000000e+000 -1.495024e-007 2.080401e-015 -3.421267e-021 1.385262e-027 -1.817616e-034 1.033665e-041 -2.199156e-049
TopRight 2 equation 6 1.000000e+000 -1.266514e-007 7.381382e-015 -6.232727e-021 1.738819e-027 -1.985394e-034 1.047164e-041 -2.123876e-049
BottomLeft 2 equation 14 1.000000e+000 -1.019254e-004 -1.127076e-006 -2.308396e-009 -2.816616e-012 -2.035692e-015 -8.979576e-019 -2.380113e-022 -3.473303e-026 -2.138093e-030
center 2 location -26 29
LeftHorizonal 3 equation 14 1.000000e+000 -8.903223e-005 -2.452693e-006 -8.963277e-009 -1.562405e-011 -1.503479e-014 -8.458371e-018 -2.763330e-021 -4.848818e-025 -3.531706e-029
RightHorizonal 3 equation 15 1.000000e+000 2.997439e-004 -3.588267e-006 1.442783e-008 -2.976923e-011 3.523034e-014 -2.535047e-017 1.125359e-020 -3.008222e-024 4.440243e-028 -2.781602e-032
TopVertical 3 equation 13 1.000000e+000 1.051531e-003 -7.867281e-006 2.382269e-008 -3.754196e-011 3.213788e-014 -1.523456e-017 3.777358e-021 -3.833785e-025
BottomVertical 3 equation 13 1.000000e+000 -1.106333e-004 -2.565080e-007 5.607061e-010 3.442450e-013 -2.418485e-015 2.480225e-018 -9.974474e-022 1.438239e-025
color 3 equation 15 1.000000e+000 -5.837742e-004 -4.435111e-006 -1.226871e-008 -1.848837e-011 -1.647550e-014 -9.108031e-018 -3.158068e-021 -6.683872e-025 -7.896462e-029 -3.993717e-033
BottomRight 3 equation 13 1.000000e+000 -1.623367e-004 3.793905e-007 -8.403502e-010 9.244108e-013 -6.306865e-016 2.415923e-019 -4.665230e-023 3.535287e-027
TopRight 3 equation 13 1.000000e+000 -4.309039e-004 1.345999e-006 -2.410669e-009 2.310172e-012 -1.298593e-015 4.152555e-019 -6.927322e-023 4.671316e-027
BottomLeft 3 equation 14 1.000000e+000 1.048315e-004 -4.915233e-007 -1.521985e-009 -2.328509e-012 -1.939104e-015 -9.502689e-019 -2.730784e-022 -4.239103e-026 -2.736203e-030
center 3 location -29 69
end
[s]/*end of file*/[/s][/i]

I know that this topic may be useful for narrow part of NEX-7 users but maybe You get interested. I read from Dr Nasse article that Hologon comes back with digital sensors is hardly imaginable. I hope my effort could change it, at last a little.

Best regards, WZ.