Dianthus opened this issue on Feb 15, 2006 ยท 12 posts
LostPatrol posted Wed, 15 February 2006 at 5:35 PM
Jim is maybe the best person to answer this on a tech level. What I know though is. 1. That extenders arent compatible with all lenses, and some lenses will only work with the 1.4 or 2.0 respectively. 2. Tele converters may affect the optical quality with some lenses. 3. I think tele converters may cost you one stop of light!? Not sure. Also tele converters may only work with fast lenses (again not totally sure) Have you considered the 100-400mm L, I have used one but dont own one, lovely lens not sure how this lens compares to the price of the 400mm L