2012年10月13日土曜日

MD lens modified





Old Minolta SLR lens MD-W Rokkor 35/2,8 has modified to adopt on Canon Eos Digital body successfully. 35mm focal length is convenient for utilizing on APS-C image format as a standard lens. 1 to 2 step iris closing from opened aperture 2,8 could obtain an excellent transparency without any complaints. There is no room to compare with any variable focal length designed zooming lenses. As I have never come across with zoom lens that has some superior performance to my favorite fixed focal lenses, I had already thrown away all of them from my stock even French made Angeniex for Leica Flex. There is no argument in my mind on this decision, because I mobilize my automobile with full fuel tank getting up before dawn praying that I could have good pictures. Actually, tremendous energy is consumed to obtain some good results. I want to have the best equipment if I shoot at the decisive moment over the fate.

Though I'm keeping several old MD Rokkor lenses, the flange back distance value 44mm was the barrier to modify them to suit on Canon Eos body with 44,5mm flange back design meaning that impossible to do that physically. But, deeper consideration on a ignorable 0,5mm distance to interfere focusing at Infinity position led me to an imagination! Any production lens has adjusting construction design to adapt to the decided standard value, so anyone should have some preparation distance and that might compensate the discrepancy of 0,5mm!

I have just proved that my imagination was to the point after arranging and modifying old MD-W 35/2,8 on Canon Eos mount on earth! Separating Eos lens cap made of engineering plastic and adhering on Minolta bayonet flange procedure were not not so difficult task for me comparing with hard and heavy works in an automobile maintenance.
Methyl-metha-acrylate self curing resin was applied to adhere plastic bayonet construction onto lens original flange being utilized as it is on the body flange. Thanks with special materials to combine metal and plastic materials together, 4-Metha, tight and solid coupling was established with any vulnerability. Of course lens rotating stopper pin hole was engraved on the lens flange surface at adapted position.
Now I have a good information from today's task that all the old Minolta MD lenses are capable for the modification using the same procedure as today including already modified Leica lenses set in Minolta lens cylinders.

I've checked both Canon 5DMk3 and 6D actually especially on finder qualities as a next equipment, the choice of 6D has eliminated completely in my mind, however lower price was set on 6D. I should realize before doing that, the smaller pent-prism case with equipped strobe light system together in it means considerable impossible in designing good finder.
Smaller and lighter are not always the requirements to select some favorable equipment if it is some amateur use. 

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