: I saw this caution first posted on Photo.net by Konrad Beck. I'm not
: aware of a primary source reference for it myself. Unless there is a
: physical limitation to the 180mm f/2.8 MC Zuiko which isn't on the
: >200,000 180mm f/2.8 Zuiko, then I have my doubts about a limitation.
: Too bad I don't know which combo I lens tested.
Below is some correspondence I had last year with Neil Graham Watson; he
mailed me had evidence that indeed only the 180/2.8 with higher numbers than
200.000 are consider to be matched by Olympus (i.e. have no negative effect
on image quality). To bad I never received the scan of the Japanese
datasheet that mentions it as a fact.
They must have redesigned the 180/2.8 after the 180/2 was designed. The
scanned data sheet (0584) of the 1.4xA in the eSIF doesn't mention either of
the 180mm lenses. At least this is evidence that the original 180/2.8 was
not compatible at least not for Olympus' quality standards. The 1085 Lens
Handbook (containing the 180/2) doesn't mention the 180/2.8 either as being
compatible.
Maybe there's a list member with a later 1.4 xA data sheet in English that
mentions both 180mm lenses? If so, I would like a scan. And a data sheet of
the later 180mm lens (if it exists) would als be nice; maybe the lens
cross-section diagram reveals some differences.
hnz
----- Original Message -----
From: "Neil Graham Watson" <nwatson@xxxxxxx>
To: "Hans van Veluwen" <hcvanveluwen@xxxxxxxxx>
Sent: Wednesday, November 15, 2000 6:20 AM
Subject: Re: 1.4 x converter
Hello Hans,
Today I went to the main Olympus Service Center in Japan and asked
specifically about the converter. The service center manager showed me
the technical data sheets which they keep. The sheets listed every
olympus lens and put a circle ( fits but not recommended ), a double circle
( recommended ) or a cross ( damage will result to lens if fitted ) next
to each lens to indicate if it was compatible with the 1.4x
converter. Unfortunately he would not give me a photo copy of the sheet
but I managed to copy down the lens with the recommended double circles
next to them. The 300 F4.5 was recommended on the technical data sheet (
but not mentioned in the sales literature )
The supported lens for the 1.4 x converter.
180 F2
180 F2.8 *( only lens with serial numbers greater than 200,000 are
recommended as the optics of the lens were changed ) ( serial numbers less
than 200,000 not recommended)
250 F2
300 F4.5
350 F2.8
400 F6.3
Regards
Neil
At 06:08 PM 11/11/00 +0100, you wrote:
>Hello Neil,
>
>: I used it as a reference when I bought a 1.4 x tele converter.
>: I bought the converter to go with the 180mm f2.8 lens which you don't
>: mention on your site as being compatible. The Japanese documentation
>says
>: the 1.4 x tele converter is compatible with 180mmF2, 180mmF2.8, 250mmF2,
>: 350mmF2.8, 400mmF6.3. If this is correct you may wish to add the
>: 180mmF2.8 to your list.
>
>This is very interesting. Are you sure you are reading it correct? And is
>the 180/2.8 also mentioned on the converter itself? On my converter this
>lens is not mentioned, and the Olympus OM System Lens Handbook does not
>mention this combination either. This is supposed to mean that the
>combination does not comply to Olympus quality standards. The fact that it
>physically fits is something different. For instance the 2XA can be used
>with the 300/4.5, but this isn't a recommended (by Oly) combination either.
>
>Btw, the 1.4xa is also compatible with the 300/4.5 - you didn't mention
>that. Is that lens not on your sheet?
>
>If the Japanese instruction sheet of the 1.4xA indeed mentions the 180/2.8
I
>would be very obliged if you could scan it and email it to me...
>
>regards,
>
>Hans
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