Rob,
Your point is well-taken: The 135/1.8A* is, of course, at the top of the
heap of other 135/1.8s, which include the following third-party
auto-diaphragm telephotos. Year of introduction is shown, followed by
original list price and list price in 1998 U.S. dollars. Unless noted,
these are available only in screwmount.
(My apologies if my tabs are misaligned)
Brand
Porst MC 135 1.8 80s? ?? ?? (82mm filter) M42
screwmount
spiratone 135 1.8 73 $135 $513 (82mm filter)
T-mount
soligor 135 1.8 73 $330 $1,255
sigma 135 1.8 74 $230 $800 (82mm filter)
rokunar 135 1.8 75 $180 $560
samigon 135 1.8 75 $260 $808
sigma XQ 135 1.8 76 $250 $728 (77mm filter)
T-mount
spiratone MC 135 1.8 77 $100 $277
formula 5 135 1.8 77 $225 $623
Zenit MC Fodis 135 1.8 97 N/A N/A (77mm filter)
Soligor CD 135 2.0 76 N/A N/A (77mm filter) M42
screwmount + K mount
--------------
The only lens in the group for which I have close-focus information is the
Zenit: 1.6 m (5.2 ft).
Supposedly the 135/1.8s that used 77mm filters are optically superior to
those thoat took 82mm filters. A German deaker that was recently offering
the Porst told me he "thought" it was made by Tamron. But I doubt this is
so, for I can find no record of a Tamron 135/1.8.
As one list member wrote, "The 135/1.8A* is 'infinitely' sharper at f/1.8
than any other Pentax 135!"
Rob Studdert wrote:
Hi Paul,
...the only real comparison that can be made WO is with the Zenit 135/1.8
MC that you mentioned in your previous list. How does the Zenit stand up
against the Pentax f1.8 WO? I expect that comparing the f1.8 at the maximum
aperture of the lenses to which it was being compared would lead you to
different conclusions.
Paul Franklin Stregevsky
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