Philip Chudy wrote: > 30 year old zeiss hologon 15mm and > Oops - might have been 13mm and 40 years old
also - perhaps 20 years ago prototypes (I believe) were made for 'single element' flat glass lenses which would exhibit virtually none of the abberations we know and love it was carefully blasted with radioactivity which changed the refractive index in a measured way across the diameter of the element and this in turn bent the light differently which ever part of the glass it was passing through. One element meant virtually no flare for example only trouble was that the glass remained radioactive and that fogged the film nowadays, with ccd's etc perhaps we dont have to worry about that - - and since photographers are so keen, the marketing folk may figure that perhaps they wont mind shortening their lives for the sake of being ready to get that great photo (if it ever comes their way, of course) philip =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
