Astro-Tech
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Astro-Tech 10mm T-thread spacer ring for DSLR and CCD imaging with 42mm Threads
$9.95This Astro-Tech 10mm T-thread spacer ring can help provide the necessary spacing between a DSLR or CCD camera's focal plane and a reducer, field flattener, or other imaging accessory in prime focus astrophotography.
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Astro-Tech 20mm T-thread spacer ring for DSLR and CCD imaging with 42mm Threads
$9.95This Astro-Tech 20mm T-thread spacer ring can help provide the necessary spacing between a DSLR or CCD camera's focal plane and a reducer, field flattener, or other imaging accessory in prime focus astrophotography.
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Astro-Tech 30mm T-thread spacer ring for DSLR and CCD imaging with 42mm Threads
$9.95This Astro-Tech 30mm T-thread spacer ring can help provide the necessary spacing between a DSLR or CCD camera's focal plane and a reducer, field flattener, or other imaging accessory in prime focus astrophotography.
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Astro-Tech 5mm T-thread spacer ring for DSLR and CCD imaging with 42mm Threads
$9.95This Astro-Tech 5mm T-thread spacer ring can help provide the necessary spacing between a DSLR or CCD camera's focal plane and a reducer, field flattener, or other imaging accessory in prime focus astrophotography.