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What is the back focus of QSI 500/600 Series cameras?
Last Updated: 06/03/2013
500/600 series cameras come in four different body sizes and have a variety of available mounting adapters. The table below summarizes the back focus for the different standard configurations.

Slim Body
(i, ci models)
0.35" (8.9mm)   w/o mounting adapter
0.58" (14.6mm) w/ T-mount adapter
0.68" (17.5mm) w/ C-mount adapter Type I
Medium Body
(s, cs models)
0.68" (17.2mm) w/o mounting adapter
0.90" (22.9mm) w/ T-mount adapter
1.00" (25.4mm) w/ C-mount adapter Type I
0.68" (17.2mm) w/ C-mount adapter Type II
Full-size Body
(ws, ws-8 models)
1.18" (30.0mm) w/o mounting adapter
1.40" (35.5mm) w/ T-mount adapter
1.50" (38.1mm) w/ C-mount adapter Type II
WSG body
(wsg, wsg-8,
csg models
1.76" (44.5mm) w/o mounting adapter
1.98" (50.2mm) w/ T mounting adapter
2.10" (53.3mm) w/ 2.156" thread adapter

Download QSI 500/600 Series Backfocus (PDF) 81kb.  Complete engineering drawings and back focus figures can be downloaded from the Documentation Page on the QSI web site.

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