Konica Hexanon 40mm/2.8 transplantation

2 pieces of donor, Konica EE Matic 40mm/2.8 were destroyed because of the intention of lens survival. As smaller as possible and as lighter as possible were the basic concept for the first time and the weight 80 gr was attained with some ugly appearance a bit. Almost of the cylinder fuselage parts made of brass material were removed for the purpose mentioned, losing focusing ring, iris controlling ring and decorative name plate including mechanical shutter construction. Because the resultant shape does not make a good impression to others, determined I to try another attempt based on a different concept, keeping it's original appearance on different circumstance with the least modification. As it's original focusing system was inside of it's lens cylinder, putting it with satisfaction of requirement, accomplishment of infinity position was not so difficult task for me even if the original lens body is obliged, not to be changed. Only the mechanical shutter mechanism removal resulted into the body weight  owes at 160 gr as a matter of fact. Helicoid releasing stop position for the latter model was enlarged angularly intending more close up shooting from 900mm to 650mm. No performance difference was observed between them, very natural result going without mentioning.
Triplet lens design & construction provides clean, clear and transparent imaging on the digital sensor, Barrel-shaped distortion, field curvature, corner image flow and bignetting are observed in exchange. From a different point of view, such kind of disadvantage could be made use of different purpose and effectiveness, making only center portion outstanding. Though recent sophisticated designed autofocusing lens with high price covers all the disadvantages at all like a ideal in a instruction book, I would take former ones. The cheaper equipment, the more fun for geriatric.