jeffnesh Posted July 3, 2014 Share #1  Posted July 3, 2014 Advertisement (gone after registration) Hi All,  I just picked up a used 50mm Summicron-M for my M240. I suspect a problem with the lens, but only have the one, so can't try another on the M240.  Anything shot in mixed light (outside or even inside as seen in one example) shows a 'wash out' in the center of the frame, upper half or so. These outdoors examples are in thick cloud cover, so no direct sun...could it be a bad flare anyway (shot with hood pulled out)? Sometimes it's subtle, sometimes very pronounced. The indoor example is in a warehouse room with light coming in a window.  Thoughts on the cause of this?  Thanks for your time, Jeff Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/229915-problem-with-50mm-lens/?do=findComment&comment=2623249'>More sharing options...
Advertisement Posted July 3, 2014 Posted July 3, 2014 Hi jeffnesh, Take a look here Problem with 50mm lens?. I'm sure you'll find what you were looking for!
DigitalHeMan Posted July 3, 2014 Share #2 Â Posted July 3, 2014 Have you checked that all the surfaces of the glass are clean? Could be caused by a smudge or similar causing some flare? Â Is it your only lens for the M, or your only 50? Have you confirmed that the problem is not caused by the sensor itself? Link to post Share on other sites More sharing options...
jeffnesh Posted July 3, 2014 Author Share #3 Â Posted July 3, 2014 Thanks for the response. It is the only lens I currently have for the M, so can't try another. I've cleaned the lens and it looks okay. It doesn't seem to be completely consistent (thus suspecting the lens), but I'll try some controlled shots indoors and see if anything leads me suspect the sensor. Â Just wondering if anyone else has seen such a thing... Â Thanks, Jeff Link to post Share on other sites More sharing options...
TheGodParticle/Hari Posted July 3, 2014 Share #4 Â Posted July 3, 2014 Is it by any chance the APO Summicron 50mm? The first few samples suffered from a similar flare issue. Just search for CVF (Central Veiling Flare) in this forum Link to post Share on other sites More sharing options...
jeffnesh Posted July 3, 2014 Author Share #5 Â Posted July 3, 2014 I wish! No, it's the version before APO. Link to post Share on other sites More sharing options...
jaroopaitummai Posted July 3, 2014 Share #6 Â Posted July 3, 2014 Somebody once let me use his Kinoptik lens and I had similar issues. The lens was pretty old. I suspected it was fog in the lens. Link to post Share on other sites More sharing options...
jaapv Posted July 3, 2014 Share #7 Â Posted July 3, 2014 Advertisement (gone after registration) I'v never seen flare like this from a sensor, it is highly probable that it is the lens. Have it checked out by a competent repair service. Link to post Share on other sites More sharing options...
TheGodParticle/Hari Posted July 3, 2014 Share #8 Â Posted July 3, 2014 Do the torch test: take a torchlight and shine it through the lens, you will get a pretty decent idea of the status of the innards. Fog, dust, fungus et al Link to post Share on other sites More sharing options...
tobey bilek Posted July 3, 2014 Share #9  Posted July 3, 2014 Do the torch test: take a torchlight and shine it through the lens, you will get a pretty decent idea of the status of the innards. Fog, dust, fungus et al  That means take a small pen light or keychain light and shine thru one side while looking inside the other, then reverse.  If you see fog, grime, scratches, spider fungus, the lens is defective. The lens needs to be clear.  This test should be done on all lenses before purchase. Link to post Share on other sites More sharing options...
retapi Posted July 4, 2014 Share #10 Â Posted July 4, 2014 Any filter on the Lens? UV/Clear/'Protection'? If yes, remove it and try again Link to post Share on other sites More sharing options...
sblutter Posted July 4, 2014 Share #11  Posted July 4, 2014 That's my main lens - no way would a bit of overcast weather effect shot #1 so dramatically with or without a hood  Find a good lens tech and have it serviced, should be about $100 USD, not bad - cuz when that lens is clean, you'll love it!  To me, the best 50 M mount ever. (Lux's are too heavy for all day and its very tough to take advantage of the razor thin DOF @ 1.4) Link to post Share on other sites More sharing options...
01af Posted July 4, 2014 Share #12  Posted July 4, 2014 Anything shot in mixed light (outside or even inside as seen in one example) shows a 'wash out' in the center of the frame, upper half or so. Congratulations—you just found out why many Leica M users don't like the Summicron-M 50 mm.  It's small, it's sharp, it has virtually no distortion at all, it's a great little lens ... except for this tendency to wash out in back-light situations (on film it used to be less pronounced). There is nothing you, or Leica Customer Care, can do about it. If you don't like it then sell the lens and replace it with a Summarit-M 50 mm 1:2.5 or a Summilux-M 50 mm 1:1.4 Asph ... or anything but a Summicron. Link to post Share on other sites More sharing options...
TomB_tx Posted July 4, 2014 Share #13 Â Posted July 4, 2014 Yes, the 50 does have this tendency, but with experience you can learn to predict it and avoid it. It is still my favorite lens. Link to post Share on other sites More sharing options...
jeffnesh Posted July 4, 2014 Author Share #14 Â Posted July 4, 2014 Thanks for all the responses! They give me a lot of directions to go with the lens. Â Thanks again, Jeff Link to post Share on other sites More sharing options...
lct Posted July 4, 2014 Share #15 Â Posted July 4, 2014 Early 50/2s do have that tendency but not no that point in my experience and the current version is more resistant to flare fortunately. Your lens needs a good check-up most probably. Link to post Share on other sites More sharing options...
jrh68uk Posted July 4, 2014 Share #16 Â Posted July 4, 2014 Strange. I've used mine on digital as well as film and have never seen this. I would have noticed straight away! I agree with others that it needs to be checked; it's certainly not normal behaviour in my experience (on digital I've used it on the M9 and M Typ 240). Link to post Share on other sites More sharing options...
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