M9 and 28 2.8 Asph

[mtomalty]

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I'm trying out an M9 with a 28mm 2.8 ASPH for a couple of days and have an initial question.

 

Does this lens normally vignette (not cut off in the corner type of vignette) quite heavily

as a function of optical design or does the specific lens I'm using have a problem.

 

The lens is new and coded with detection set to 'on' so I can only assume that correction is already

being applied but am still seeing easily more than a stop from center to corner.

 

That aside the lens is sharp as a tack

 

Thanks,

Mark

 

Mark Tomalty Photography Montreal Canada Travel Landscape Stock FineArt

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[lars_bergquist]

If you have doubts as to code reading (and error DO occur) then check the exif file. The focal length should be displayed there.

 

The old man from the Age of the Enigma Codes

[hoppyman]

Mark that lens does have something more than a stop vignetting , dependant on actual aperture. Not at all uncommon. I don't have that particular lens (I have the Summicron) but it is not dis-similar at equivalent aperture. Comparing on the M9 vs. an M7 I see considerable correction being done in camera and hence much less visible vignetting.

Some suggestions to check:

Current M9 firmware?

double check that you have auto lens detection (lens data is shown in the EXIF)

You don't have some significant thickness of filters or a non-standard hood?

 

Take a look at how you are processing in your Raw converter too. Some exposure alterations can exacerbate differences like that too.

[jplomley]

I see very little vignetting with the 28/2 Cron Asph. I put that down to in-camera correction since on my M7 shooting chrome film, I see vignetting up to about f/4.5.

[Nikkor AIS]

Can I see some examples with the M9 and the 28 2.0 @ 2.0

Thanks in advance

 

Gregory

[hoppyman]

Jeff that is exactly my experience also. You get a real appreciation of just how much correction is going on with the custom 24x36 sensor and the firmware.

Important not to discount the effects in Raw processing also, where a more subtle effect can be made much more dramatic when significant development alterations are applied too.

 

These are at moderate apertures, but are, I think, a pretty clear example. Both from nearly full frame, first is M7 and transparency film; second is the M9 obviously.

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Chain photo - Geoff Hopkinson photos at pbase.com

 

 

I see very little vignetting with the 28/2 Cron Asph. I put that down to in-camera correction since on my M7 shooting chrome film, I see vignetting up to about f/4.5.

[mtomalty]

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Thanks all, for the comments and advice.

 

I do expect some measure of tonal vignetting at wider apertures,particularly with wide lenses, but

was a little surprised at the amount still present in the f 8.0-f11 range.

Also quite noticeable cyan corners were present in the tests.

 

I haven't been able to track it down,yet, but I recall reading a thread earlier this year that

spoke of vignetting characteristics of different wides. Some commenters suggested that the

due to lens design the 28 2.8 asph could be more prone to vignetting than other wides.

 

Mark

Mark Tomalty Photography Montreal Canada Travel Landscape Stock FineArt

[jplomley]

Well this lens was introduced alongside the M8. Perhaps it was never intended for full frame digital? Hopefully the new 28 Lux (wishful thinking) will be a stellar performer.

[Viv]

I can't speak for the Leica lens, but the Zeiss Biogon 28/2.8 exhibits no vignetting on the M9.

[hoppyman]

Well this lens was introduced alongside the M8. Perhaps it was never intended for full frame digital? Hopefully the new 28 Lux (wishful thinking) will be a stellar performer.

 

No Jeff I don't believe that is the case. Every new lens introduced is designed to be suitable for 24x36 (film and sensor of course).

What the OP is describing does not sound normal but it is difficult without seeing the Raw files. I'm convinced that there is a factor or factors not yet apparent.

Some vignetting is very usual wide open in any case and is often un-noticeable in practice. The MTF digrams are the best explanation naturally. Those address what the lens itself does, however not what is done to the file in camera and post

At f/2.8, in the extreme corners, the Elmarit retains about 30% of the luminance. For comparison the Biogon retains about 20%. Both are excellent lens naturally but of different character and form factor especially.

 

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[Jamie Roberts]

I see very little vignetting with the 28/2 Cron Asph. I put that down to in-camera correction since on my M7 shooting chrome film, I see vignetting up to about f/4.5.

 

Agreed with Jeff. There is some vignetting wide open with the M9, but none I really noticed; again, less than on the M6.