06-26-2011, 09:18 AM
Technically a full format 140-600mm f/9.6-13.4 could be almost as small ... but it wouldn't allow any phase-detection AF so it wouldn't make any sense to design one.
The Pana 45-200mm f/4-5.6 OIS is just as small and heavy as the Canon 55-250/4-5.6 IS despite identical field-of-view in the respective format - just to give you a counter example.
But from a real world perspective you're generally right, yes.
The Pana 45-200mm f/4-5.6 OIS is just as small and heavy as the Canon 55-250/4-5.6 IS despite identical field-of-view in the respective format - just to give you a counter example.
But from a real world perspective you're generally right, yes.