Erik van Straten
Veteran
I would use a 'FLQOO' hood on your Summar
It was designed for the 3.5cm f3.5 Elmar but it can be used on the 5cm Hektor, Elmar and Summar.
I think it is the finest lenshood produced by Leitz, so neat and small and makes it much easier to adjust the aperture on the Hektor and Elmar being wider for the fingers than the 'FISON'.
Anybody agree with me ? 🙄
O, yes, the FLQOO is great, I have four of them. They sell now for EUR 250-300, so ... But they are not good for the Summar: vignetting. The post-war shorter version of the FLQOO, the FOOKH, is the best shade for the Summar.
Erik.