Archived posting to the Leica Users Group, 2008/11/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Nov 23, 2008, at 2:11 PM, Geoff Hopkinson wrote: > Steve you really need good contrast to achieve good resolution, the > two go > hand in hand. to a degree, as you suggest Geoff, you need some contrast to measure resolution, but the DR offers a combination of very high resolution with very low contrast.... beyond that, I don't believe there is any relationship between the two parameters... since I don't know more, I'll leave it to others with real expertise in optics to clarify, if they can and wish... it's my impression that the unusual properties and look of the DR have always been attributed to its unique balance of very high resolution and low contrast... but when it comes to physics and optics, I don't know, and I didn't sleep in a Holiday Inn last night... Steve > The well recognised smooth look that you are describing may be > partly from moderate contrast, but also from the degree of correction > present. With more aberration present, the out of focus blurs can > retain > their general shape and be smoother by being more blurred! That is > not meant > to be a criticism of valid personal preference. Of course my taste > there is > probably well established. > > Has anyone else noticed that this evolving thread is almost a digest > of > perennial LUG topics? > Lens coatings, > Lens cleaning, > Artistic vs. technical, > Favourite lenses > What great master photographers used etc etc > Now I suppose I have introduced the B word. > > > Cheers > Geoff > http://www.pbase.com/hoppyman/e > http://gallery.leica-users.org/v/gh/ > Pick up your camera and make the best photo you can. > > -----Original Message----- > Subject: Re: [Leica] Are Leica lenses muliticoated? > > > this same argument applies to some of the greatest and highest > resolution > lenses of the past...for example the Summicron 50/2 DR...low contrast > combined with very high resolution allows a unique smooth look...and > you can > always increase the contrast if desired... > > I am not sure how the coating impacts, or what the coating is for > the DR... > > this look and behavior likely accounts for this lens being the > desert island > favorite of so many individuals... > > > Steve > > > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information