50 summilux or 50 summicron -r for canon ?? the best ??

[the warrior]

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Hello, this is the cuestion, summilux or summicron. more difinition, sarpnes, aberrations, etc,etc, in the MK III.

 

thanks

[Jamie Roberts]

Depends on the Summicron or Summilux (what version), and how good you are at manually focusing on your mark3.

 

Assuming the current versions, the cron will be easier to acheive focus, but of course only the lux has that f1.4 goodness.

 

The current versions are both razor sharp and beautiful lenses from f2 to their diffraction limit, which I think is around f8, IIRC.

 

So the latest version R Lux is as sharp as the cron, which is an amazing optical achievement, IMO.

 

The 50 R lux is one of my all-time favourite lenses, period, and is fabulous on the 5d / 1ds2. The L series 50 1,2 doesn't come close, though I like it for other reasons.

 

On the Leica DMR the 50 Lux just sings...

[EH21]

James,

Just curious .... why do you say the 'cron is easier to MF?

[chocy0924]

Because f2 is much eaiser to focus than f1.4 due to more DOF at max aperture of Summicron

[EH21]

Yeah but on the 5d you'd be using stop down metering or perhaps even MF at the desired aperture on both lenses. If it were really easier to MF at f/2.0 then you could also set the lux to that.

[Jamie Roberts]

Yeah but on the 5d you'd be using stop down metering or perhaps even MF at the desired aperture on both lenses. If it were really easier to MF at f/2.0 then you could also set the lux to that.

 

Yes, of course you could always buy a Lux to use at f2, but that would be silly, wouldn't it?

 

It is easier to focus manually at f2 on the Canons because the screens aren't optimised for manual focus. They're dark dark dark compared with the DMR.

 

As for stop down to focus, well, not in my experience. I'd focus, then stop down, then shoot.

 

Of course, you can get autofocus confirming adapters for use on the Canons, but they're pretty finicky and it still takes more time to nail f1.4 than f2.

 

You're also right though--if $$ is not an object and you will actually use 1.4-2.0, then the Lux is the answer. Truthfully, they're both awesome lenses, and if you can live at f2, then get the 'cron. You won't be missing anything from 2.0 on down.