In some applications, access is restricted or results in an uncomfortable viewing position.  To overcome this, a range of high quality rigid optical viewing adaptors are available for connection to the eyepiece of rigid borescopes and small diameter flexible fiberscopes. Download the Olympus brochure Accessories Pages 24 & 25 The AK2 rigid viewing adaptors are available in a variety of lengths and viewing angles.  Additionally, the AK2-Zoom adaptor provides a variable magnification from 1.5 to 3 times.