hand-held instrument with 2,5V battery handle in case - 27 lenses: range from +1 to +10D in steps 1 than +15 +20 +40D and range from -1 to -10D in steps 1 than -15 -20 -25 -35D [Read more...]
the module is the basis of every BETA® handle - by adding the appropriate bottom inserts it is possible to assemble
any other handle - any BETA handle can be converted to another model [Read more...]