A flashback.

Kodak Ektar 100 is probably the closest you can get to Kodachrome reds, that film last being sold in 2009.

Leica M3, 35mm f/3.5 Summaron RF.

Leica M3, 90mm f/2.8 Tele-Elmarit.

Both on Kodak Ektar 100 with TIF scans from The Film Developing Co.