meowzilla Posted January 17, 2009 Share #1 Posted January 17, 2009 Advertisement (gone after registration) I received this lens last week and the lens is in pristine condition with no sign of use. But I noticed the aperture seemed not to fully open at f/2. Compare to other lens I have, eg. Summilux 35mm Asph, the aperture ring is not visible when wide open but this Summicron 35mm lens shows a little bit edge of the aperture at full aperture. Anybody Summicron 35mm IV owner noticed this ? Is this normal? Quote Link to post Share on other sites More sharing options...
Advertisement Posted January 17, 2009 Posted January 17, 2009 Hi meowzilla, Take a look here Summicron 35mm Version IV - aperture cannot open wide?. I'm sure you'll find what you were looking for!
farnz Posted January 17, 2009 Share #2 Posted January 17, 2009 I don't have this lens but there are other Leica lenses where the diaphragm is still visible at full aperture. It's likely to have something to do with masking the edges of the elements (that produce the worst lens aberrations) to improve overall picture quality. If you find that the shutter speed decreases as you would expect when you stop down from f/2 to f/2.8 then it's likely that the diaphragm's retracting as far as it's intended to. Pete. Quote Link to post Share on other sites More sharing options...
LeonardT Posted January 17, 2009 Share #3 Posted January 17, 2009 I have the same lens and it shows a little of the blades as well. However when I change the aperture from f2 to stopped down 1 click, or 1/2 stop, the shutter changes 1/2 stop as well. My Summilux is as your Summilux as well. I don't think your lens has a problem. Len Quote Link to post Share on other sites More sharing options...
Philippe D. Posted January 17, 2009 Share #4 Posted January 17, 2009 Hi and welcome, I noticed the aperture seemed not to fully open at f/2.(...) Is this normal?Be cool, yes it is.Otherwise it would be a Summilux, that's the reason it is a bit restained. Quote Link to post Share on other sites More sharing options...
lct Posted January 17, 2009 Share #5 Posted January 17, 2009 ...Anybody Summicron 35mm IV owner noticed this ? Is this normal? Yes it is mine does this as well. Quote Link to post Share on other sites More sharing options...
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