Konica lens diagrams

[Tim Gray]

I'd be interested in looking at the block diagrams of the Konica Hexanon-M lenses. Any body have these that they'd be willing to share?

Thanks.

 

[Bavaricus]

Today i received my M-Hexanon 90. Heres the scan of the lens scheme:



As known it's a Ernostar/Sonnar type, a triplet variant. The second group comes with a 'air lens'. It's a very compact wonderful lens!

 

[ferider]

Have a look here:

KM 21-35:

http://ca.konicaminolta.jp/support/manual/ls/rf21_35lj0.pdf

KM 35/2.0

http://ca.konicaminolta.jp/support/manual/ls/rf35lj0.pdf

KM 90/2.8

http://ca.konicaminolta.jp/support/manual/ls/rf90lj0.pdf

KM 50/2.0

http://ca.konicaminolta.jp/support/manual/ls/rf50lj0.pdf

KM 28/2.8

http://ca.konicaminolta.jp/support/manual/ls/rf28lj0.pdf

UC 35/2:

http://www.dantestella.com/technical/hex352.html

Roland.

 

[Tim Gray]

Perfect. Thanks guys!

 

[johannielscom]

35/2.0 L-Hexanon, the 1996 screw mount Hexanon lens:

 

[sanmich]

Interesting,

despite it's negative front element, the KM 35 seems to be a completely different beast than both the leica 35mm ASPH.

I wonder if it includes an aspherical element by itself...

 

[ferider]

35/2.0 L-Hexanon, the 1996 screw mount Hexanon lens:

Very close to UC 35/2, Hexar AF and grand-mother Nikkor 35/1.8, see Dante's web site.

 

[Tim Gray]

Interesting,

despite it's negative front element, the KM 35 seems to be a completely different beast than both the leica 35mm ASPH.

I wonder if it includes an aspherical element by itself...

It does appear to be different than most of the Leica 35's. The 28 however does look derivative of the Leica 28 Elmarit pre-ASPH.

 

[johannielscom]

I got the 50/1.2 diagram on paper in the box of my lens, I'll do my best to scan that tomorrow. There's a DOF chart in there as well that I'll include for future reference.

@Ferider: optically the L-Hex and the UC-Hex are identical, but the UC has all lens surfaces coated, while the number of coatings on the L-Hex is unknown. Only word on the exact number of coated surfaces is that it's 'identical to the Hexar AF lens.'

I love this lens.

 

[ampguy]

The lens diagram for the M-Hexanon 28/2.8 is the same as the V4 pre-asph Elmarit 28/2.8 E46, but photodo.com shows higher MTF scores for the M-Hexanon.

Puts has also written that it is sharper than the Elmarit, and 28 Summicron.

Not bad specs for a ~$700ish lens

 

[Krosya]

Interesting,

despite it's negative front element, the KM 35 seems to be a completely different beast than both the leica 35mm ASPH.

I wonder if it includes an aspherical element by itself...

I too often wondered about Asph. elements in M-Hexanons, yet Konica doesnt seem to state so. On the other hand its performance is right there with the best of them (Leica ASPH Cron). It's too bad Konica is no longer in business - It would be cool to see what else they could make in other FLs for M cameras - like 24mm or 21mm lenses...

 

[Krosya]

There is some info here too:
http://www3.xitek.com/bingqiku/konica/rangefinder/m-konica-lens.htm

 

[ferider]

Interesting that the M-Hex 35/2 is very similar in design to the 35/1.7 Ultron

The Ultron replaces a single complex element toward the front of the Hex with a double compound, and looses one element in the back due to aspherical surface. Otherwise very close, including the concave front surface.

Roland.