pgk Posted February 22, 2015 Share #61 Posted February 22, 2015 Advertisement (gone after registration) One imagines that coatings and flare control measures have steadily increased too, so the change to more recent aspherical designs probably also brought other contrast boosting changes. Coatings and anti-reflection measures probably have become better, but only marginally (a very few %). Any significant (ie 1/3 to 1/2 stop) shift is IMO extremely unlikely in the lenses that you mention (it would be interesting to know their 'T' stop - the Summarit has been 'changed' (re-rated?) recently I believe. The 'contrast' shift must be looked for elsewhere I believe. Link to post Share on other sites More sharing options...
Advertisement Posted February 22, 2015 Posted February 22, 2015 Hi pgk, Take a look here 90 2.5 Summarit vs. 90 2.8 Elmarit ?. I'm sure you'll find what you were looking for!
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