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

Started 2 months ago | Discussions thread
pforsell Veteran Member • Posts: 3,542
Re: Struggle? ...

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


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. Nothing whatsoever mandates that. Let's play a game. Let me set ISO 6400 and shutter speed of 1/125. The exposure meter recommends f/5.6. We'll go with those settings.

Then I start lowering the ISO from 6400 to 3200, 1600 and finally 800. I keep the shutter speed and aperture constant, as I am not shooting in any auto mode. Can you see that while the ISO goes down the shutter speed does not go down.

A couple of pictures speak more than a thousand words. These are shot almost at  sunset in the rain.

ISO 6400 - 1/125 - f/5.6

ISO 3200 - 1/125 - f/5.6

ISO 1600 - 1/125 - f/5.6

ISO 800 - 1/125 - f/5.6

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