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Camera lens; Telescope Minitel 500mm; tripod - $75 (SW Austin)
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Included:
a tripod support (included),
a lens hood (included),
an adaptor so it can be converted into a telescope when it’s not attached to a camera (included …. the long tube at the rear of the lens.)
[I've added a Reflectasol Umbrella to add pro lighting to your closeups and portraits.]
The Spiratone Minitel 500mm f8
The "screw-in mount" universal T-mount (T2 system) system uses a 42mm screw thread (M42x0.75 pitch) to accept interchangeable adapters.
By threading a cheap, widely available T-mount adapter onto the back of the lens, you can easily mount it to almost any camera system:Vintage SLRs: Canon FD, Nikon F, Pentax K, Minolta MD. or Modern DSLRs & Mirrorless: Canon EF/RF, Sony E-mount, Fujifilm X, and Micro Four Thirds
77mm front for screw in filter.
Compact lengthn at only 4¾ inches long, weighing roughly 1 pound.
Practical Application & Use Cases
Wildlife and Sports Photography: The combination of long reach, very low chromatic aberration, and a sharp center makes this ideal for tracking distant subjects in high-contrast lighting.
Industrial Inspection & Surveillance: The flat field resolution across the corners (34 l/mm) ensures that textual or mechanical data spread across a 6"x10" target area remains legible edge-to-edge.
Astrophotography: Mirror-lens optical configurations are highly prized for celestial tracking because they eliminate the colored halos (purple fringing) around stars that plague traditional refractive telephoto lenses.