Summer training

In spite of the hottest Summer season I determined to go out for two days trip with 60-300mm zoom lens. Because I will go up to the Nunobiki mountain on this Thursday for night view shooting utilizing this lens, least experience must be compensated in few days. 750gr weight makes me hesitate to carry with me, but I must convince myself for the reason that the weight is the same as Leica M3 body that I had been used to for long time. Though I have been suffered from sharp pain in right thumb finger muscles at some specific angle use, whip myself on my hip and I will do my best.