Reply to thread

Message: <blockquote data-quote="WayneF" data-source="post: 296418" data-attributes="member: 12496">Maybe nothing, you may be more comfortable to ignore it.  The design details are largely beyond us all, and  I think it only helps me to justify the cost, and to indicate concern of the design.I see it as being like bore and stroke in car specs... and trunk cubic feet and rear seat room.  Specs, but not concerns for many drivers, nothing we can quote from memory.I always heard (for decades) that f/0.5 was the absolute conceivable limit, due to the conflicting corrections needed for the wide angles (a lens twice wider than it is long).  Of course wider construction is surely possible, but not with acceptable performance.  It seems f/1.2 or f/1.4 has pretty much been a practical limit (20% or 40% longer than wide).Zeiss recently made a f/0.7, but only ten copies were ever made.</blockquote>