The 28mm f2.8, which this thread is about, has a 7 elements in 7 groups optical construction, in both the Rokkor and Celtic version. At any rate, both have a 8 elements in 5 groups optical construction. However, from all I could tell it was the same lens, and I was not able to distinguish from the pictures between the difference in coatings. The only lens I have ever owned in Celtic and Rokkor version at the same time is the 100-200mm f5.6 - admittedly not a stellar performer in either version. In some Celtic lenses only the coatings and the label seem to differ from their Rokkor counterpart - of course the marketing department would not hesitate to call this a "new design -) That is true in that all Celtic lenses differ in some features from their Rokkor counterpart, but it is not true that they always have a different optical construction.
My understanding is that ALL celtics were new designs
0 kommentar(er)
