Wimberley Plamp II PP-200 lens mount_Mamiya 7 This is a good quality

This is a good quality plastic 8x loupe for print or negative inspection

The Nikon TC-14E III is an autofocus teleconverter designed for select Nikon AF-S telephoto lenses (here's Nikon's compatibility list)

You can use this setup for off-camera TTL flash with any compatible Nikon Speedlight (not included)

The Canon EOS Rebel XSi is a compact DSLR that shoots 12mp still- but no video

but either way it's a much less structured experience than you might be used to

Wimberley Plamp II PP-200 lens mount_Mamiya 7 This is a good qualityWimberley's Plamp II PP 200 is a bendy utility arm, totally unrelated to their tripod heads: You can use to to grip bounce cards, hold small subjects in position, or keep stems and grass out of the way if you're trying to get that perfect flower shot. Or anything! It's just a bendy utility arm. One end has a heavily sprung mounting clamp, the other end has a foam filled screw clamp for holding those aforementioned small objects. In excellent condition.