Exakta RTL 1000 - Page 27

focusing with the Penta Prism. For fitting
and removing the Penta Prism see page 27.
An invaluable accessory for use with the
Penta Prism is the flexible eyepiece cup:
this is fitted on to the eyepiece (42) of the
Penta Prism and shields it from distracting
straylight. It is also helpful for spectacle-
wearers since vision-correction senses made
by one's optician can be inserted into the
revolving mount, making it possible to focus
without wearing glasses.