Flare:
Buy a Leitz 50mm Dual Range Summicron lens. Point the lens in the general direction of the sun. sunlight filtering through trees seems to work "best" (tranlasted: Worst!). Ruin half a roll of Kodachrome. GRRRRRRRRR!!!!!!!!
Buy Konica rangefinder lenses. Aim them anywhere. Bright sun. Bright lights. Wide open. Stopped down. No flare. Even the Konica lens on the camera my dad bought in 1950 or 1951 won't flare. GRINNNNNNNNNNNNNNN!!!!!!!!!
Most modern zoom lenses are somewhere between the best and the worst as far as flare is concerned. Most modern lenses have fewer iris blades and may not look the same as older lenses with lots of blades.
Samples. Not mine. Borrowed from the Rangefinder Forum:
No flare:
This is not flare. This is the iris making a pattern of the sun:
THIS is flare. Veiling flare I think it's called. Not good to my eye. This is what my Summicron mentioned above will do.
