View Full Version : 210 Rodenstock YSAR

Henry Butler
27-Feb-2001, 21:37
I have just acquired a Rodenstock 210 YSAR in barrel.Any one have any info on th is?What is the YSAR all about?The seller assured me it was sharp and will cover 5x7.What is rare earth glass?Was I taken for a ride?THANKS

Pete Andrews
28-Feb-2001, 06:16
The Ysar is Rodenstocks version of the Tessar, I believe. Rare earth glass is optical glass that has the addition of some Lanthanides in the melt. This increases the refractive index without overly increasing the dispersion (Abbe number) of the glass.As to whether you were taken for a ride or not depends on how much you paid.