[opendtv] Re: Line Pairs/millimeter vs. Price vs. Image Format Area


I may have miss understood, but what I heard from Bert was that considering
two lenses with the same qualities but covering a different image area, a
larger format lens is cheaper while Craig said the opposite is true.  If
that is what the argument was between, I must agree with Craig.  In my
years of buying and testing lenses for film cameras, a lens that must cover
a larger image area and maintain the same overall qualities is much more
expensive.  While it is true that the MTF of the system needs to be
considered for the overall performance, when considering the lens only, it
is more difficult and expensive to make a lens to cover a larger image area
and still maintain all the positive qualities (max. resolving power, light
transmittance, colorimetry, MTF, etc.)  Naturally, technology has helped
increase the qualities, format area AND reduce the cost, but when comparing
lenses of the same generation, I believe my statement holds true.  If this
is not the argument and I am lost, please feel free to ignore me!

Dan Grimes

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