>From: "Cian S. Perez" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: Eos <[EMAIL PROTECTED]>
>Subject: RE: EOS Re: What's the point of EF 100mm Macro?
>Date: Wed, 18 Apr 2001 08:16:03 -0700 (PDT)
>
> > According to Canon USA, the near focus distance for
>the 100/2.8
> > EF macro is
> > 12" and for the newer USM version is 5.9"
> > 12" = 30.48 cm and 5.9" = 14.986 cm.
> > --
> > regards,
> > Henry Posner
> > Director of Sales and Training
> > B&H Photo-Video, and Pro-Audio Inc.
> > http://www.bhphotovideo.com
>
>
>This is odd. On the basis of near focussing distance
>alone, the older non-USM 100/2.8 Macro seems gobs more
>attractive then the newer USM version.
>
>To be able to get full 1:1 magnification at 12" is
>definitely a lot more desirable than the same at 5.9".
> Think of all the butterflies you wouldn't scare away!
> Think of the increased working distance to allow for
>lighting equipment, etc.
>
>Am I missing something here?
>
>Cian
This can get confusing in a hurry.
The Canon Camera Museum says the following:
100/2.8 USM Close focus 310mm/12.2in.(measured from the film plane).
Overall lenght is 119mm (not sure how this is measured relative to the film
plane). Working distance is 149mm/5.9in (measured from the front element).
The Canon USA site says the "distance from subject to front of lens, at
closest focus setting" is 5.9in. This is what most consider to be the
working distance
100/2.8 non-USM also has a close focus of 310mm but it does extend it's
front elemtent when focusing. It's overall lenght is 105.5mm/4.2in. But
the front element extends from there and thus you will loose working
distance.
Does any one know how long the 100/2.8 non-USM lenght at 1:1?
Darrell
[EMAIL PROTECTED]
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