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11-15-2010, 09:54 PM   #1
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Porst Tele MC Auto D 135mm 2.8 vs M 135mm 3.5

Dear All,

Which one is better IQ wise and Bokeh.

Any experiences with Pentacon 135 they call bokeh monster?

Need help asap, i wanted this range.

Thanks

11-16-2010, 03:21 AM   #2
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Join Date: Jan 2010
Location: Southern England
Posts: 495
I don't know anything about the Porst, other than what I read here:

https://www.pentaxforums.com/forums/pentax-beginners-corner-q/108320-regardin...nual-lens.html

You may find this helpful.

Regarding the M135/3.5, I have one of these, amongst several other 135s, and really like the fact that it's much smaller and lighter than the others. This makes it a popular choice for putting on my camera!

I'm happy with the IQ of this lens (I haven't any images which have "awkward" bokeh situations), but would expect my S-M-C Takumar, Pentax K and Carl Zeiss Jena versions of 135/3.5 to outperform it in a controlled comparative test (which I haven't yet got round to doing).

Just to summarise the salient features of the 135s I mentioned:

M135/3.5: very compact and lightweight
K135/3.5: excellent IQ, slightly heavier to focus
S-M-C Tak: excellent IQ, wonderful smooth focusing, lovely build quality, but M42
CZJ: excellent IQ, all controls heavier, poorer build quality, M42 of course

If you're after nice soft bokeh, I'm thinking that the CZJ might be your best (but most expensive) option:

Bokeh Test

Do note that it can be difficult to provoke "bad bokeh" in real-life situations, and that a lens which is known for "bad bokeh" may actually perform satisfactorily most of the time. And bokeh is a subjective thing, anyway.
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