Incidentally, I seem to recall having a set of such rings FS, if anyone
is needing (I have two sets -- not *quite* sure how that happened, but
it wasn't explicitly planned for)
--thomas
On 17 Jul 2005, at 03:13, Chuck Norcutt wrote:
> Since both lenses go 1:2 on their own they need 1/2 of their focal
> length in additional extension to reach 1:1. For the 50mm that means
> the 25mm tube. For the 90mm it means the 25+14+7mm tubes for a total
> of
> 45mm additional extension.
>
> Chuck Norcutt
>
> Wayne Culberson wrote:
>
>> I think a 25mm extension tube will take the 50/3.5 to 1:1. I'm not
>> sure how
>> much extension is needed for the 90/2, but I would guess about 50mm of
>> extension. A 25mm extension tube can be made from a basic 2x
>> converter by
>> removing the glass. They are practically free. Extension tubes
>> produce light
>> loss only.
>> I have the Vivitar 55/2.8 which goes to 1:1 by itself, and the Vivitar
>> 90/2.5 which goes to 1:1 with the matched extension adapter. Also, the
>> vivitar 2x macro takes the normal 50/1.8 to 1:1.
>> Wayne
>>
>> ----- Original Message -----
>> From: "John Hudson" <OM4T@xxxxxxxxxxx>
>> To: <olympus@xxxxxxxxxx>
>> Sent: Saturday, July 16, 2005 9:14 PM
>> Subject: [OM] adding to macro
>>
>>
>>
>>> This question may have been addressed in the recent past and if it
>>> has I
>>
>> apologise for raising it again.
>>
>>> As I understand it, both the 50/3.5 and 90/2 Zuiko lenses produce
>>> nothing
>>
>> larger than a 1 : 2 life size image on 35mm film.
>>
>>> Is there a ring or attachment for use with either lens that will
>>> increase
>>
>> the life size image on film to a 1 : 1 ratio?
>>
>>> If so, can anyone advise on the cost, specifications and
>>> availability of
>>
>> the required rings or attachments?
>>
>>> Also, is there any advice on the loss of definition experienced when
>>
>> adding the ring or attachment to either lens as compared to using them
>> without?
>>
>>> Thanks
>>>
>>> John Hudson
>>> Nova Scotia, Canada
>>>
>>>
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>>
>>
>>
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>
>
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