PasMichiel Posted June 18, 2010 Share #1 Posted June 18, 2010 Advertisement (gone after registration) Link to post Share on other sites More sharing options...
Advertisement Posted June 18, 2010 Posted June 18, 2010 Hi PasMichiel, Take a look here Is the Red dot on the lens the same for M and R ?. I'm sure you'll find what you were looking for!
bill Posted June 18, 2010 Share #2 Posted June 18, 2010 It's red and it's a dot. so yes. In the examples I have to hand there is some sample variation in shade, but this may be due to age, wear/weathering. There is certainly no discernible difference in size between M and R. It is a little known fact that the dots are in fact shipped to Leica as 4mm balls. They are polished down to size and trimmed into hemispheres with a special machine. The rejection rate is high - the dots have to be perfectly shaped, after all - and any spherical aberrations are rejected. The machine that does the splitting is getting on in years, and did not survive the original move from Wetzlar to Solms very well; it is quite large and has to be levelled to micrometric accuracy. It can spend months being overhauled, as happened recently, accounting for the delay in shipping Summiluxes worldwide. The glue that holds the dot to the lens is made to a special recipe originally devised by Max Berek. Hope this helps! Regards, Bill Link to post Share on other sites More sharing options...
jaapv Posted June 18, 2010 Share #3 Posted June 18, 2010 There are two sizes, the standard one of 4 mm and the smaller one of 1.5 mm, not in use any more but still available.. The glue is Pattex contact glue. Bisonkit transparant for Dutchmen. Link to post Share on other sites More sharing options...
PasMichiel Posted June 18, 2010 Author Share #4 Posted June 18, 2010 Thanks. Where can I order it easy on the web? Link to post Share on other sites More sharing options...
bill Posted June 18, 2010 Share #5 Posted June 18, 2010 Phone Leica - they normally ship them out for free. Regards, Bill Link to post Share on other sites More sharing options...
earleygallery Posted June 18, 2010 Share #6 Posted June 18, 2010 I find that a dead ladybird works just as well and gives a more bespoke look! Link to post Share on other sites More sharing options...
frc Posted June 19, 2010 Share #7 Posted June 19, 2010 Advertisement (gone after registration) The depicted one is definitely an R-one. The M-ones are so much more M. Can't you see that? Link to post Share on other sites More sharing options...
k_g_wolf ✝ Posted June 19, 2010 Share #8 Posted June 19, 2010 Was it mentioned above, that these dots are made of coloured glass ? This is NOT simple plastic- stuff (thought that for years), and valuable little designpiece. Better not to loose them. Thx Bill for putting this product into the right historic perspective. Best GEORG Link to post Share on other sites More sharing options...
Wolfgang Esslinger Posted June 20, 2010 Share #9 Posted June 20, 2010 Was it mentioned above, that these dots are made of coloured glass ? Is this the glass Leica lenses are famous for??? Now I know why Leica is always more expensive but does not always provide a better performance... Link to post Share on other sites More sharing options...
mby Posted June 20, 2010 Share #10 Posted June 20, 2010 Is this the glass Leica lenses are famous for??? Now I know why Leica is always more expensive but does not always provide a better performance... Actually, it is the older, mid-20th century glass with its slight radioactivity which gives the ball its subtle glow... Link to post Share on other sites More sharing options...
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