Humood Posted January 4, 2011 Share #1 Posted January 4, 2011 Advertisement (gone after registration) My summicron 28mm produces a lot of vignetting when I mount it on my M9 even on bright daylight shots, does that mean that the lens needs adjusting? Help! Link to post Share on other sites More sharing options...
Advertisement Posted January 4, 2011 Posted January 4, 2011 Hi Humood, Take a look here Summicron 28mm and vignetting. I'm sure you'll find what you were looking for!
lars_bergquist Posted January 4, 2011 Share #2 Posted January 4, 2011 Does it register properly in the EXIF data? Thre old man from the Dark Ages (in the corners) Link to post Share on other sites More sharing options...
jaapv Posted January 4, 2011 Share #3 Posted January 4, 2011 Vignetting cannot be adjusted on the lens. I do not specifically know how much vignetting this particular lens produces, but I would guess in the order of 1 1/2 to 2 stops, as that is normal for a 28 mm. If it bothers you it can be easily corrected in postprocessing. It should be less if the camera recognizes the lens. You did have it coded/selected? Link to post Share on other sites More sharing options...
Humood Posted January 4, 2011 Author Share #4 Posted January 4, 2011 Does it register properly in the EXIF data? Thre old man from the Dark Ages (in the corners) I have to check that! Thanks Link to post Share on other sites More sharing options...
Humood Posted January 4, 2011 Author Share #5 Posted January 4, 2011 Vignetting cannot be adjusted on the lens. I do not specifically know how much vignetting this particular lens produces, but I would guess in the order of 1 1/2 to 2 stops, as that is normal for a 28 mm. If it bothers you it can be easily corrected in postprocessing. It should be less if the camera recognizes the lens. You did have it coded/selected? The lens is a new coded version, you are right but the vignetting it produces varies from 1.5 to even 2 stops! none of my other lenses have a similar problem, I guess I have to correct it by software! Thanks Link to post Share on other sites More sharing options...
Eastgreenlander Posted January 4, 2011 Share #6 Posted January 4, 2011 My summicron 28mm produces a lot of vignetting when I mount it on my M9 even on bright daylight shots, does that mean that the lens needs adjusting? Help! On my MP it does not vignette much but on my M9 it does. It doesn't boughter me, if it does I remove it in post. Link to post Share on other sites More sharing options...
richfx Posted January 4, 2011 Share #7 Posted January 4, 2011 Advertisement (gone after registration) Doesn't sound right. My 28mm Elmarit ASPH coded lens has never vignetted at all on my M9. Rich Link to post Share on other sites More sharing options...
jaapv Posted January 4, 2011 Share #8 Posted January 4, 2011 Well, I looked it up and 1.5 stops wide open can be considered normal for this lens. Link to post Share on other sites More sharing options...
farnz Posted January 4, 2011 Share #9 Posted January 4, 2011 Humood, Please bear in mind that vignetting can be caused by a number of factors: 1. Natural vignetting: illumination fall-off is due to the fourth power of the cosine of the angle that the light hits the sensor (also called the cosine rule). The M9's sensor has offset lenses at its edges to lessen this effect but owing to manufacturing tolerances not all sensors will have the same response. 2. Optical vignetting: the design of the lens; ie the number of elements, their configuration and their coatings. 3. Physical vignetting: off-axis light is partially blocked by, for example, a lens hood, filter or filter ring. The vignetting that you've experienced may be a combination of the above. Pete. Link to post Share on other sites More sharing options...
jpattison Posted January 4, 2011 Share #10 Posted January 4, 2011 Doesn't sound right. My 28mm Elmarit ASPH coded lens has never vignetted at all on my M9. Rich Yes, but the lens in question is the Summicron! John Link to post Share on other sites More sharing options...
UliWer Posted January 4, 2011 Share #11 Posted January 4, 2011 Doesn't sound right. My 28mm Elmarit ASPH coded lens has never vignetted at all on my M9. Rich Optical vignetting is higher for larger apertures. If you look for the data sheets for the 28 Elmarit and the 28 Summicron on the Leica website you find out that vignetting is almost equal for both lenses at f/2.8 (aprox 70%). Naturally it is higher at f/:2 for the Summicron. Puts says it has a vignetting of 2.1 f-stops, which is what the thread opener guessed. Link to post Share on other sites More sharing options...
Dan States Posted January 5, 2011 Share #12 Posted January 5, 2011 The Summicron does have a noticeable amount of vignetting but not because of the maximum amount, which is comparable to other 28mm lenses. On the 28 the falloff starts closer to the center of the frame. It is particularly strong on high contrast slide films and will be likewise on digital devices. You can set up a correction in LR3 if it bothers you too much. That is the trade for a tiny lens with an F2 aperture....it's really a marvel of engineering with almost no airspace between the elements. Best wishes Dan Link to post Share on other sites More sharing options...
jaapv Posted January 5, 2011 Share #13 Posted January 5, 2011 I went to Erwin Puts' Lens Compendium last night. The Summicron has "marginally more" vignetting than the Elmarit, which he rates at 1.8 stops wide open. Link to post Share on other sites More sharing options...
tgray Posted January 5, 2011 Share #14 Posted January 5, 2011 I've noticed this lens vignettes more than other lenses that I have, with the exception of the Zeiss 21/4.5. Link to post Share on other sites More sharing options...
adan Posted January 5, 2011 Share #15 Posted January 5, 2011 Real life - the 28 'cron vignettes rather noticeably. Film or digital. As mentioned, esp. @ f/2 the image starts darkening within a couple of mm of the center (the vignetting "bell curve" is almost triangular rather than domed). The good news - your lens does not need adjustment. Link to post Share on other sites More sharing options...
Luuk Posted January 5, 2011 Share #16 Posted January 5, 2011 My summicron 28mm produces a lot of vignetting when I mount it on my M9 even on bright daylight shots, does that mean that the lens needs adjusting? Help! If you look at the tech spec you will see some serious vignetting is normal! Check if lensdetection is on auto. Or select the lens manually. The M9 corrects most of it in camera. It's a very nice lens to work with! Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.