Bob S wrote:

"Is it for similar reasons that the limited lenses (43mm & 77mm) are 
outrageously expensive?  They seem to be extraordinarily well made and modern 
compromises to hold the price down seem infrequent in their design.  But 
there are also some nagging questions about how sharp they are wide open.  
And we seem to imbue them with other special optical properties like "3 
dimensional" rendition.

Could it be that these lenses are just a modern return to the level of 
quality presented in the old screwmounts?  (Also with some updates for 
optical qualities)"



REPLY:

The Limited lenses are certainly a look back. Its also no coincidence that the Limited 
lenses (so far) are close to sought after, collectible K-mount lenses; eg. 85/1.8 
(77/1.8), 40/2.8 (43/1.9), and 30/2.8 (31/1.8). 
However, their optical properties is born from an even earlier eras optics. The 
special 3D qualities is present in the classic japanese lenses for rangefinders (40's- 
50's) due to various abberations usually corrected in newer lenses. I guess this 
qualities may have been present in the lenses for the Asahiflex and the earliest M42 
Takumars. So Pentax have fine tuned various abberations in the Limited lenses in order 
to get the same pleasing effect. The Limited lenses wide-open performance may not be 
great, but how many lenses are sharp wide open? I've never seen a fast lens thats 
sharp wide open. The sharpest lenses wide open I have tried are the Macro lenses. Some 
super telephotos are also rather sharp wide open, but they are not fast in absolute 
terms, only relatively. I've never seen a F:1.someting that was sharp at those wide 
apertures.


Pål



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