While C1 cameras were always compatible with CS-mount standard (1"
diameter thread with 32 TPI and 12.5 mm BFD), with the introduction of 12 MPx camera with 1.1" sensor
(C1-12000), CS-mout lenses are no longer capable to cover such large
sensor area without significant vignetting and image aberrations. Even
the 2/3" 5 MPx sensor in the C1-5000
camera could be too big for small CCTV lenses. Standard photographic
lenses, designed for large sensors, must then be used.
C1 camera with Canon EOS (left) and Nikon (right) bayonet
C1 cameras with universal M42 × 0.75/CS-mount adapter has only
18.5 mm back focal
distance (BFD). To comply with requirements of various optical
correctors (coma-correctors for Newtonian telescopes, field-flatteners
for refractors etc.), extension tubes with 55 mm BFD are available. Due to an existence of two
standards, both T-thread (M42 × 0.75) and M48 × 0.75 thread adapters are
The extension tube outer diameter is exactly 2 inches (50.8
mm), so it allows using of the C1 camera with any 2" focuser instead
of 2" eyepiece.
Canon EOS and Nikon bayonet lens adapters use the same
M42 × 0.75/CS-mount
adapter on the C1 camera body as the threaded extension tubes, they
are attached using M42 thread on the camera side.
C1 camera head with threaded extension tubes (left) and
M42, M48, Nikon and Canon EOS adapters (right)
With these adapters, C1 cameras become compatible with wide range
of CS-mount lenses as well as large photographic lenses...
C1 camera with CS-mount CCTV lens (left) and with large
Canon EOS lens (right)
...as well as with various telescope focusers, optical correctors
for both reflecting and refracting telescopes etc.
C1 camera with 55 mm BFD
T-thread adapter (left), C1 camera as a guider on the EVOguide small