> If the Summicron was also new - what would be the price difference?
> Would you pay that?
Xmm, I would expect the price difference would approach something like 50% (say, 400-600$) which definitely would put Summicron out of question.
Frankly, new or used but indeed in LN condition doesn't make much difference (aside of some warranty on brand new which isn't the case for used of course), so it's probably indeed down to brand preference rather then quality choice though I'll be glad to be pointed to even subjective quality/reliability differences if such exist between two of these.
The additional argument aside of "brand pride" would probably be resale value. Apparently Leica original glass holds its value undoubtedly, so chances if one will be willing to sell it after usage being in the same condition as was bought, no money loss will be suffered.
Having said that, it seems however that the Zeiss also holds its value cery well....
> Why do RF'ers so agonize over gear anyway?
Good question, but probably can be extended to a general photo geeks community, not only RF'ers...;-)
Since I assume 50mm lens will serve as my main tool and will probably make 60-80% of my RF photography, I strive to get the best one I can afford. This Summicron is priced probably at the very top of my budget for fine normal lens thuogh still can be fitted in it, but Planar being cheaper alternative apparently provides no less quality...go figure...