leica mp240 + 35mm summicron with/without lens hood = vignetting

[joeq]

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other than correcting the dark corners in lightroom, is there any way to avoid vignetting? does shooting wide open (f2) vs stopped down to say 11 or 16 make a difference? are there in-camera settings i should change? thanks in advance!

[fotomas]

Stopping down makes it better. Guess even it f 5.6 it should be much better then fully open.

[joeq]

2 minutes ago, fotomas said:

Stopping down makes it better. Guess even it f 5.6 it should be much better then fully open.

thanks - but what if i particularly want shallow dof? or the light conditions don't all for 5.6?

[fotomas]

Then I would compensate it in the post-processing. It's pretty easy today. 

For largeformat wideangle camera-lenses there was center-filter available that compensated it partialy. But I never saw something like this for 35 mm. They where, by the way, quite expensive.

[jankap]

Try to find the MTF curves for your lens. Here is an example.

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You see here, that at 9mm from the center of the sensor for this lens type the vignetting is 25% maximum. That means, that at f/2.0 the vignetting is around 0.5 f/stop in the 9mm radius circle.

You cannot blame a lens hood, that is designed for this lens.

Edited December 22, 2024 by jankap

[joeq]

4 hours ago, jankap said:

Try to find the MTF curves for your lens. Here is an example.

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Simply register for free here – We are always happy to welcome new members!

 

 

You see here, that at 9mm from the center of the sensor for this lens type the vignetting is 25% maximum. That means, that at f/2.0 the vignetting is around 0.5 f/stop in the 9mm radius circle.

You cannot blame a lens hood, that is designed for this lens.

thanks for the effort but this is a little over my head.

[Jean-Michel]

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20 hours ago, joeq said:

other than correcting the dark corners in lightroom, is there any way to avoid vignetting? does shooting wide open (f2) vs stopped down to say 11 or 16 make a difference? are there in-camera settings i should change? thanks in advance!

Nope! All lenses have vignetting to some extent, some more pronounced and some less, but all do. Closing down the aperture does lower the amount vignetting to some extent. Using an improper lens hood can make the vignetting worse, as is using a filter in a thick mount or stacking filters; using a normal filter causes no problems. 
Correcting dark corners used to done by dodging in the darkroom and now that much more easily done in Lightroom or any other image processor. 
Note that closing the aperture down to f/11 or f/16 will perhaps minimize vignetting, increase depth of field, and degrade sharpness — you pick the compromise that you need for your image. On an 24 mpx sensor diffraction starts at f/8 or so. How visible any of that shows up depends on the size of your print, and if you need a very large depth of field just close down the aperture and be done with it. 

[lct]

Better have deep pockets to reduce vignetting but even then it is not insignificant.

Summicron 35/2 apo :

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[jankap]

In this example you see, that at f/stop 2.8 in the far corners only 40% of the light reaches the sensor. That means a vignetting of more than one f/stop. Four corners, so at these 4 extreme places of the sensor the lens is only an f/4 lens.

Interesting here is the f/5.6 curve.

A viewfinder camera gives the lens designer a constraint. The lens must be small, otherwise the user sees the lens in the viewfinder instead of the subject. The no-go is of course shadowing the rangefinder field in the viewfinder.

In a small lens, the glass elements can only be small. And small glass elements transmit less light.

Edited December 25, 2024 by jankap

[pippy]

On 12/22/2024 at 7:13 PM, joeq said:

other than correcting the dark corners in lightroom, is there any way to avoid vignetting? does shooting wide open (f2) vs stopped down to say 11 or 16 make a difference? are there in-camera settings i should change? thanks in advance!

Answering your questions in order;

No. There is no way to avoid vignetting completely with the equipment listed.

Yes. Stopping-down geatly reduces the amount of vignetting.

Perhaps. Are you using any in-camera lens profile(s)? Some profiles will automatically correct for some vignetting (etc). It might be worthwhile experimenting.

Just FWIW - albeit not with a 35mm Summicron - here's a link to Mr. Rockwell's results with a 35mm Summilux (v2) lens. Examples go from f1.4 down to f4.0 (scroll 3/4 down the page);

https://www.kenrockwell.com/leica/35mm-f14.htm#perf

Philip.