Quote:
Originally Posted by Ian Robinson
Only gaining one stop to get the EF 135mm f/2L . It's also a bit smaller 72mm diam cf 77mm diam for the EF 70-200 f/2.8L so you'll loose some the advantage of going from f2.8 to f2 in the light gathering stakes.
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The diff in diameter is negligible.
The 135mm is a superb lens, sharp as a tack and has beautiful bokeh for terrestrial.
It's a top performer for both terrestrial and astro.
The biggest advantage of the 70-200 f/2.8 over the 135mm is obviously the zoom range.
It's a hard choice, I'd buy the 135mm but if you want the versatility go for the 70-200mm f/2.8.
You won't regret either.