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)