# Start (Soviet SLR) — Camera mount flange focal distance and adapter feasibility For Start (Soviet SLR), flange focal distance (mm) is 42.00; mount type is SLR; format is 1958–1964, verified against its source on 2026-08-13. - **Mount name:** Start (Soviet SLR) _(verified: appears in the quote below)_ - **Flange focal distance (mm):** 42.00 _(verified: appears in the quote below)_ - **Mount type:** SLR _(verified: appears in the quote below)_ - **Format:** 1958–1964 _(verified: appears in the quote below)_ ## What the source says > Start (Soviet SLR) | 42.00 mm | SLR | | 1958–1964 | | | | | | ## Source - https://en.wikipedia.org/wiki/Flange_focal_distance Last verified: 2026-08-13. Review by: 2028-08-12. Part of [Camera mount flange focal distance and adapter feasibility](https://referencesource.org/camera-lens-body-adapter-compatibility/).