Some K, M and A-lenses on K-1

After the M 42 Takumar era was over in 1975, Pentax renamed their lenses Pentax SMC. (Super Multi Coating.) The new mount was called K-mount and has been the Pentax mount ever since, although improved with new electronic functions. Thus we are fortunate to be able to use all earlier lenses on today's DSLRs.

The K-lenses were made from '75 till the smaller M-cameras took over in '76. These smaller cameras needed smaller lenses, and the M-lenses were introduced. There were no technical differences.

The M-system reigned till 1983, when the fully automatic A-system, with automatic A-lenses, substituted the M-line. 

We will have look at some of those lenses. As one will see, all of the tested lenses are very good! 

A scale from 1-10 is used for sharpness. 
Very soft is used when points are <6
Soft is 6-6,5
Fair is 7
Good is 7,5-8
Very good is 8,5-9
Excellent is 9,5-10.

The very best lenses are marked with a Vill, the very good ones with aSmiler stort, and the good lenses with a Kul

Some K, M and A-lenses from 1975 and later

K 24/2,8:Smiler stort Centre: Very good wide open. Excellent from 4.
             Corners: Soft wide open, fair at 4. Good at 5,6 and 8.

K 55/1,8: Smiler stortCentre: Soft wide open. Good at 2,8. Very good to excellent from 4 to 8.
                   Corners: Soft at 1,8. Fair at 2,8. Good from 4 to 5,6. Touches very good at 8.

M 50/2: Smiler stort Centre: Good at 2. Tends to excellent at 2,8 and 4. Very good at 5,6 and 8.
                  Corners: Good from 2 to 4. Very good at 5,6 and 8.  

M 50/1,7:Vill Centre: Good at 1,7. Very good from 2 and 2,8. Excellent from 4.

              Corners: Good at 1,7 and 2. Very good from 2,8 to 4. Excellent at 5,6 and 8. 

M 105/2,8: Smiler stort Centre: Good at 2,8. Very good at 4 and 5,6. Excellent at 8.
                      Corners: Very good wide open to 5,6. Excellent at 8.
                                  Tends to have sharper corners than the reference D FA 100/2,8!

M 200/4: Smiler stortCentre: Good at 4, very good from 5,6, with a peak at 8. (Tested also at 11)
             Corners: Sharpness as good as in the centre!

M 75-150/4: Smiler storttested at 150mm:  Centre: Very good at 4. Touches excellent at 5,6 and 8.                    Very good at 11.
                 Corners: Very good from 4 to 11. A surprisingly good lens!

A 50/1,4: Smiler stortCentre: Soft at 1,4 and 2. Good at 2,8. Excellent from 4.
             Corners: Fair at 1,4 and 2. Good at 2,8. Very good at 4. Excellent at 5,6 and 8.

A 28-80/3,5-4: 

 

Pentax SMC (K) 24/2,8
Pentax SMC M 50/1,7
SMC Pentax M 105/2,8

Skriv en kommentar: (Klikk her)

123hjemmeside.no
Antall tegn tilbake: 160
OK Sender...
Se alle kommentarer

| Svar

Nyeste kommentarer

16.09 | 18:53

Yes, there were lenses branded Pentor, probably Cosinas. Pentax cameras were branded Pentar in some markets. Lenses were always branded Takumar, until 1975.

...
16.09 | 18:21

Hi . i think it is pentor. From japaneesecthird Party Lena Maler ... Sold with praktica cams in w.Europe

...
16.09 | 13:50

Hi .. Thank you for that great site. Here found finally some information PENTAR .. But found nothing Internet about PENTAR 135 mm 2.8 mit 12 Blades . do you ?

...
14.09 | 16:29

Correct! No lever. But as it is connected to the automatic shutter, you have to shoot automatic if blinding the finder! Thanks for bringing this up!

...
Du liker denne siden