The M system was an early name for the OM system. The M-1 camera was the
OM-1...the OM-1 name came later to that camera. You are thinking of the
screw mount SLR Oly made before the M/OM system came out. The camera used
the M42 mount used by Pentax and lots of others...it wasn't made long before
the bayonet mount M-1 (later renamed OM-1) replaced it.
--
Chris Crawford
Photography & Graphic Design
Fort Wayne, Indiana
http://www.chriscrawfordphoto.com My portfolio
http://blog.chriscrawfordphoto.com My latest work!
http://www.plumpatrin.com Something the world NEEDS.
On 11/8/07 6:36 PM, "Rand E" <rtomcala@xxxxxxxxxxx> wrote:
>
> The screw in mounts are most likely to the Oly "M" system that came
> before the OM system. Other Olympus screw in mounts were on the earlier
> versions of the 20mm and 38mm macro lens and they had a microscope type
> screw mount. The later versions of the macro lens in 20mm and 38mm came
> with an OM bayonet mount but were very limited on focusing ability. I'm
> sure about the focal length on the early macro lens and the 38mm later
> macro lens, and I'm fairly sure about the 20mm but I could be a little
> off on it. The other macro lens (50mm, 80mm, 135mm all had OM bayonet
> mounts).
> Rand E.
>
> P.S. Please sing out with your home locale as we have many other
> members from "Down Under" and I'm sure that they would be interested.
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Matthew Granger wrote:
>> Thanks Rand E.
>>
>> I heard that there were some odd OM lens that were actually screw in. How
>> can I find out if the one I have described below is the normal OM push and
>> twist mount, or something else?
>>
>>
>> On 09/11/2007, Rand E <rtomcala@xxxxxxxxxxx> wrote:
>>>
>>> Welcome Matthew,
>>> The usage of OM lens on the E-thingies is really welcome. The fast
>>> tele's are great. Like that 200mm f4 OM lens will give you a 400mm f4
>>> tele on your E-500. But, the OM wides turn into "normal" focal
>>> lengths. i.e., the om 24mm lens is now about the same as a 48mm lens
>>> would be on the OM body. In other words, "You win some, and you lose
>>> some".
>>> Rand E.
>>>
>>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>
>>> Matthew Granger wrote:
>>>> Hi
>>>>
>>>> This is my first post. I have an OM body with a variety of lenses, and
>>> an
>>>> E500 with an adapter ring so I can use the OM lenses.
>>>>
>>>> I am still building up my kit, and am looking at buying an om system
>>> 200mm
>>>> f:4 lens online. As the picture they have shown is a bit odd, I cannot
>>> see
>>>> the mount. Can anyone advise whether it possible this is screw/bayonet
>>>> (basically anything other than the 'normal' OM mount?) I would have to
>>> get
>>>> it to find it won't fit.
>>>>
>>>> Also, any suggestions on a good wide angle lens that is affordable to
>>> use on
>>>> my E500 - I was thinking a 24mm.
> \
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