Minolta MD 28/2 on EOS

Mechanical construction of a removable bayonet nail plate and the external infinity adjusting point made me determine to modify Minolta MD 28/2 latest model onto Canon EOS digital formatting image body. The former condition means that the inconvenient extruded part could be eliminated without any grinding procedure avoiding interferences in EOS mirror box, in addition to 0,5 mm backward positioning caused by  innate 43,5 mm shorter flange back design. Only 5 screws loosening can carry out the purpose without some troublesome procedures. The latter one does that final infinity helicoid adjustment could be done without disassembling lens element from anterior direction as having been done on older MC lenses mentioned before.
The focusing method by moving lens elements is different form ordinary wide angle view lenses, in spite of straight helicoid designing, the frontal lens element rotates while focusing ring is activated? Probably simultaneous movements of another lens module would be happened for some aberration's compensation?
As a matter of another attention, the most frontal glass looks smaller considering F number 2, some newer super transparent glass with lower dispersion material must be introduced in the lens element designing?

A piece of plus headed adjusting screw for infinity helicoid position is fixed by cementing material in addition to 2 small minus headed masked locking screws, approximately 1 mm diameter, 3 screws are designed in total for infinity position adjustment. In order to tighten them and to fix  focusing ring onto helicoid outer surface, some experience and skills are required, because too hard tightening torque on them invites some distortion of helicoid construction body, easily distorts leading to heavier rotating movement of focusing ring, so very precise even and adequate adjustment is indispensable for this torque setting procedure. 1 mm left side displacement of helicoid was the position for EOS mount, 0,5 mm frontal position compared with the original Minolta lens flange as the result. Now, setting Minolta lens on EOS mount is established with all attaining infinity focusing, in spite of 0,5 mm shorter flange-back discrepancy.

The purpose for using Minolta MD 28/2 brighter lens on EOS digital formatting image is to enjoy the way of expression on the out focusing gradual transition on the picture, so focusing point infront should be verified accurately through the finder of SLR camera, range finding by human eye is not enough in such situations. This is why I decided to modify it onto EOS using 28mm lens as 35mm one on APS-C formatting imaging area. Thanks to brighter F number of 2, Canon 7D finder commands a fine views when it is attached. So, this MD lens would play and work great with me in future.