The first lens testing I did was back in 70 or so. I pitted my 55 f1.8
up against my 50 f1.4. There was co comparison as the 55 was indeed sharper.
The testing was done with panatomic X and covered all click-stops. The
optimum aperture was between f5.6 and f8.0 for both centre and corner
resolution.
The K series should be nearly the same, although the old Takumars were
better built lenses. Yoshihiko's excellent site seems to confirm this. I use
the 55 on both my screw and k mount cameras as my standard lens even though
I have the 50 f1.4s in both series. I seem to like, in the case of the
Spotmatic, the fact that the viewfinder magnification presents a image that
appears the same as the eye.
The 55 K are not plentiful so if you find one, grab it. Otherwise any of
the f1.4s are very good with the A reported as slightly sharper that the K
and Ms.
I have both the 28 f2.8 and f3.5. There is no comparison, the f3.5 even
wide-open is better that the f2.8 aperture for aperture.
Bob
----- Original Message -----
From: "A K" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, January 15, 2002 9:24 PM
Subject: Is SMC 55/2 K the best Pentax standard lens? (and 28mm ?)
> Hi,
>
> I've read at few places on the net, that an old SMC 55/2 K is the best
> Pentax standard lens in terms of pure optical quality, regardless of
maximum
> aperture and other factors.
> Is that true?
>
> I currently have SMC 50/1.4 M and SMC 50/1.7 M should I try to find it, or
> should I go for SMC 50/1.4 A?
>
> Maximum aperture is not important for me at all, it is the f5.6 - f11 kind
> of performance that I'm after - but of course, it would be nice if it is
> also good wide open.
>
> I'm not after AF lens since they are very hard to find secondhand in my
> country and frankly, I don't like the manual focus feeling with them.
>
> What about 28mm lens?
> from some posts it seems that SMC 28/3.5 K is the best.
>
> I have the SMC 28/2.8 A and have an 3.5 K on offer for around 75$ should I
> go for it and ditch my old 2.8 A (well, I won't ditch it, I'll use it on
my
> MZ-S on those rare occasions when I need autoeverything program)?
>
> thanks,
>
> Aleksandar
>
>
>
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