What will Canon's next EF lens be?

Andy Blanchard wrote:

(...) current screen tech is all but useless for prolonged use in extremely low temperatures.

You write down some interesting points.

Being a wildlife shooter, I already have problems with my 7DII on cold days. Always take two extra batteries with me.

Battery life is also a concern here since you *have* to use the screen or EVF to use the camera; no "spotting" with it in standby or off, which is a major issue for some arctic wildlife photographers.

An issue for all wildlife photographers I think, because watching and waiting can take hours. With a DSLR the camera is simply 'on', nothing else, even the IS is not activated until you start focusing. No battery drainage.

Likewise there is a small, but noticeable, lag with mirrorless.

Deal-braker, I want to see the action as it is happening.

For those that prefer to take a more decisive moment approach rather than spray and pray, that's also a deal breaker. Despite what you might think given the FPS of the 1-series, a surprisingly large number of sports and and wildlife photographers (e.g. the people Canon actually tends to listen to) do just that, and that lag is a killer.

Deal-braker, you can't start shooting before the 'right moment' because you may need all the shots from the buffer.

Besides, if you start too early your card will be loaded with useless images. Often, you have more than 100 bursts for a bird when trying to get it right. Start too early (you have to when there is noticeable lag) and you send 1000 unwanted shots on the card before the real action even begins.

It reminds of the introduction of the first guitar synthesizers. Because of the lag, players had to learn themselves to play 12/100 sec in front of the music. This goes against everything a guitar player is doing and ruins your normal playing style.

The same applies to spray and pray before the action begins.

Lag should be lower than 1/100 even with fast action.