Canon's release of 600/800mm f11 lenses PROVES you don't need Cannons!

Started 2 months ago | Discussions thread
Gary from Seattle Veteran Member • Posts: 4,783
Re: No ...

Wu Jiaqiu wrote:

Gary from Seattle wrote:

jwilliams wrote:

cosmicnode wrote:

jwilliams wrote:

Messier Object wrote:

But at the edges of the shooting envelope - in dim lighting when high shutter speeds need to me maintained - these lenses will struggle

Peter

Struggle? No more so than the fastest 800mm equiv. m43 lens. Nothing in m43 at 400 is faster than f5.6 which is the same as f11 on FF. The 800 sucks up as much light as any m43 400 lens available. Also Canons DPAF is quite good.

But the shutter speeds are 2 f stops faster for the m4/3 lens.

No they are not. You bump up the ISO 2 stops which gives equal noise to m43 2 stops lower and the SS is the same. Simple as that.

Bump the ISO 2 stops on a mediocre lens and you will get mediocre results. Probably competitive with the 75-300 or 100-300 or they would use this methodology on all of their lenses. They don't.

i think you miss the point of making smaller, lighter and cheaper prime telephoto lenses for use with their FF mirrorless cameras, i'll wait for the tests to see if they are mediocre or perform the same as any other lens stopped down to f/11, Canon makes loads of different telephoto lenses....get your wallet out and take your pick

Surely, wait for tests. But if fresnel lenses like this were the great future, it would rob sales of their top lenses. There will be a large cost in IQ or in speed and light transmission.

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