Re: [Leica] Cosina lenses

["dominique pellissier" <noct@club-internet.fr>]

- ----- Original Message -----
From: Luc Janssens/Micro-Connection <luc@psion-be.com>
To: <leica-users@mejac.palo-alto.ca.us>
Sent: Monday, January 24, 2000 9:12 AM
Subject: Re: [Leica] Cosina lenses


> Hi,
>
>
> After buying two Pentax lenses which I didn't like I started collecting
the
> lens tests of Chasseur d'Image.
> And since then I have never bought a lens without consulting their tests
> first.
> Unlike other magazines not all the lenses are good.
> The lenses are tested with 4 diafragmas and in the middle and the border
of
> the image.
>
> The Cosina 15mm f4.5 has only 2 stars out of 5 for performance.
> 4 of 5 stars for price,quality
> 4 of 5 stars overall
> The optical results are
> f4.5 middle average +   border average -
> f5.6 middle good -              border average
> f8       middle good            border good
> f11      middle good            border good
> At f4.5 there is a vignetage of 1 diafragma
> at f5.6 0.6 diafragma
> at f8 0.4 diafragma
> Under the 2 meters the finder is inaccurate.
> This is a completely other story then the German magazine.
>
> The Cosina 25mm f4
> Performance 3 star out of 5
> Price/quality 2 out of 5
> Overall 1 out of 5 Here they give the (stupid) reason that you have a 24mm
> f2.8 for SLR for less money.
> The optical results are
> f4      middle good     border good -
> f5.6    middle good     border good
> f8      middle very good -      border good
> f11 middle good +               border good
> Vignetage
> f4 0.6 diafragma
> f5.6     0.4 diafragma
>
> The Elmarit M ASPH
> Performance 4 stars out of 5
> price quality 1 star out of 5
> Overall 3 stars out of 5
> optical performance
> f2.8            middle very good                border good
> f4              middle very good                border very good
> f5.6            middle very good                border excellent -
> f8              middle very good                border excellent
> Vignetage
> f2.8            0.6 diafragma
> f4              0.3 diafragma
> The Leica lens gives better results at f2.8 then the Cosina at f8.
> I think I prefer the Elmarit for his quality the Cosina for his price.
>
>
> Regards
>
>
> Luc
>
#################

I read CI tests too and my opinion is the following : these tests are
rigorous
and the team of testers has a scientific attitude, i.e. they don't write
that their tests are the best in the world.

I don't understand all that fever around these so-called "Voigtländer"
lenses made by Cosina.
Cosina has been and is a manufacturer of mean lenses. Period.

Between the elmarit 24 and the cosina 24 no need for a photo finish !

The 15 is funny but I don't see the use.