Voigtlander 35mm f/2 APO-Lanthar Review

inksandpaper wrote:.Field curvature is not affected by element spacing or mount issues.


Still 7artisans said their 28/1.4 FE+ was tweaked for Sony by altering the distance between lens elements. However, that is to reduce the effect of the thicker sensor stack, which also gives astigmatism and isn't inherent in the lens design.

Edit: I think many people are confusing mechanical vignetting with backwards curvature of field, because the effectively smaller aperture towards the corners will make DOF deeper, which looks like curvature of field.

Also, I've found that IBIS in one of my cameras can radomly tilt the sensor/field with adapted lenses, which gives very confusing and strange results. Could be a factor if one believes you got a "bad copy".