The “character” of the Ultron can be summarized under these points (imo):
-Sharp and contrasty but with subtle optical character.
-Images often have a bit of “pop” or micro-contrast.
-Photographers often say it strikes a perfect balance between modern clinical lenses and vintage character lenses.
- Voigtlander colors and a strong balanced color saturation
The weaknesses were:
- Bokeh especially at further distances
- Vignetting at wide apertures (not significant and goes by f2.8/4)
- corner softness at wide apertures (gone by F4)
Would be interesting to see if the Septon has the same character as its essentially an ultron with an extra element to optimize it for MILC.