Archived posting to the Leica Users Group, 2000/10/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hello! Thank you for these tests. Indeed, Russian lenses have very pleasant unsharphess (contradiction?) Jupiter 3 have many aperture blades, this may make good out-of-focus-lights reproduction (bokeh? Does anyone believe in bokeh? ), also design is somewhat symmetrical - look at drawing of Sonnar 1.5/50, this may help to make this design considerably rectilinear. One more - Jupiter have only six air-to-glass surfaces. If we add also that all surfaces are coated or multicoated (true? Marc, help please..), we have a design which has remarkable contrast and is resistant to flare. Even if flare appears, this is only one-two spot, even pleasant. Bad point of this design is single, strongly curved front element, making Jupiter 3 prone to astigmatism. I haven't tested Juipiter 3 for this, but, judging by my photos ( www.geocities.com/Stanislaw_Stawowy - I promise to add more photos as fast as I will have some time - now I am too much absorbed by working with Alastair on FOM2 website), astignatism is minimal. Please, whoever have something to add, write this. I am currently looking for people' opinion about Russian lenses and will finally put some compilation of this on my website (of course asking for rights to publish first :-) St6. St. (Stanislaw B.A. Stawowy)