35 'cron Vignette?

[FiZZ]

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So my version 1 35mm 'cron has a serious vignette when I shoot at f/2.

 

Not complaining, but is this a characteristic of the lens?

[luigi bertolotti]

Erwin Puts - Leica Lens Compendium - on the 1st Summicron 35 :

 

.." at full aperture vignetting is 2.5 stops and at aperture 2.8 is 2 stops.."

 

No much changed with the 2nd version (same source) :

 

..." Vignetting is high with more than 2.5 stops, but the lens is distortion free"...

 

Then the 3rd version:

 

..." Vignetting is lower with less than 2 stops, but now some distortion is visible..."

 

Then the legendary 4th version :

 

..." Vignetting is high with 2.5 stops and distortion is not visible..."

 

...and finally the ASPH ! :

 

..." Vignetting is lower with 1.8stops and distortion is only visible at the far out zones..".

 

Of course, less noticeable on the cropped M8...

 

[Xmas]

So my version 1 35mm 'cron has a serious vignette when I shoot at f/2.

 

Not complaining, but is this a characteristic of the lens?

 

Can you scan a corner with uniform illumination like a sky, were you using a filter and/or a hood?

 

Noel