Using an inexpensive, non-coupled adapter. ~$80.
Hot-Mirror filter on the 24/2.8, cost ~$10 used.
Framing using the full view of the finder. The adapter brings up the 50 lines. I quit using the preview, just used the entire finder. Worked well.
Wide-open at F2.8:
Stopped down to F5.6:
Closer in, also F2.8.