With two microscope adapters included, it offers three different mounting sizes on microscope side, 23.2mm, 30mm and 30.5mm, fitting almost all kinds of microscopes including compound and stereo microscopes.
Canon and Nikon SLR/DSLR Camera Adapter for Microscopes Features & Specifications: Compatible with Canon SLR/DSLR cameras including EOS Rebel XTi, EOS Rebel XS, EOS Rebel XSi, EOS Rebel T1i, EOS Rebel T2i, 7D Mark II, 7D, D30, D60, 10D, 20D, 30D, 40D, 50D, 60D, 70D, 100D (Rebel SL1), 300D (Digital Rebel), 350D (Digital Rebel XT), 400D (Digital Rebel XTi), 450D (RebelXSi), 500D (Rebel T1i), 550D (Rebel T2i), 600D (Rebel T3i), 650D (Rebel T4i), 700D (Rebel T5i), 750D (Rebel T6i), 760D (Rebel T6S),1000D (Rebel XS), 1100D (Rebel T3), 1200D (Rebel T5)Compatible with Nikon SLR/DSLR cameras including D40, D40X, D50, D60, D70, D70S, D80, D90, D100, D200, D300, D300S, D3000, D3100, D3200, D3300, D5000, D5100, D5200, D5300, D5500, D7000, D7100, D7200Magnification Power: 2XMaterial: metalMounting Size on Microscope Side: 23..5mmMicroscope Adapters Included: two adapters converting 23.