Canon 75-300mm USM vs 100-300mm USM

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Hi, I need to choose between the Canon 75-300mm II/III USM and the Canon 100-300mm USM, I cant affrod the 75-300mm IS and I just care about optical quality

Thanks

-- Bulldog (bulldog69@writeme.com), September 29, 1999

Answers

I think that is common opinion that optical quality is the same. Difference is in USM, 100-300 has ring USM, 75-300 has micro USM.

-- Ivan Miksik (miksik@biomed.cas.cz), September 29, 1999.

Here's a review of the 75-300/100-300 lenses, from Bob Atkins at the Nature Forum. Also, I seem to recall some consternation about the 100-300 zooming when tilted down...

-- Scott (bliorg@yahoo.com), September 29, 1999.

I have owned both. Optical quality is very similar. The 75-300 is a about a half stop faster optically up to about 250mm. After this they are the same; f:5.6 with slightly soft images. They have nearly the same dimensions, but the 100 300 is a bit heavier I believe. The 100-300 handles better, looks better, feels better. It also uses a ring type USM (The 75-300 uses a micro motor USM). This allows the 100-300 to use Full Time Manual focusing (FTM) even while in auto focus mode. It also doesn't rotate the filter ring like the 75-300 does while focusing.

If all you care about is optical quality,the new Sigma 75-300 f:4-5.6 APO is regarded as somewhat better. Don't get the DL version though.

-- Jim Strutz (jimstrutz@juno.com), October 11, 1999.


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