For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens. Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood. The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. Yashica Yashinon 50mm F/1.8 Ĭosina Voigtlander Color-Skopar 50mm F/2.5 Ĭosina Voigtlander Heliar 50mm F/2 “Cosina 50th Anniversary, Bessa 10th Anniversary” Ĭosina Voigtlander Nokton 50mm F/1.5 Aspherical Ī lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. Teikoku Kogaku (Zunow Opt.) ZUNOW 50mm F/1.1 Leica 5cm f2 summicron collapsible M-mount Today im going to sell of my 1st leica 5cm f2 summicron lens, it is the 1st collapsible lens that i ever own, very solid, very compact when it collapsed in, makes it very easy to put inside bag or cary around. Leitz Wetzlar / Leitz Canada Summarit 50mm F/1.5 Leitz Wetzlar Summicron 50mm F/2 Dual Range Ĭosina Voigtlander Heliar 50mm F/2 VM “Voigtlander 250th Anniversary” Ĭhiyoda Kogaku Super Rokkor 50mm F/1.8 Ĭhiyoko Super Rokkor 45mm F/2.8 Ĭhiyoko Super Rokkor 50mm F/2.8 Leitz / Leitz Wetzlar Summar 50mm F/2 Ĭosina Voigtlander Apo-Lanthar 50mm F/2 Aspherical VM Ĭosina Voigtlander Nokton 50mm F/1 Aspherical VM Ĭosina Voigtlander Nokton 50mm F/1.2 Aspherical VM Ĭosina Voigtlander Nokton 50mm F/1.5 Aspherical II VM Ĭosina Voigtlander Nokton 50mm F/1.5 Aspherical VM Leitz Wetzlar Summicron 50mm F/2 Dual Range The earlier 1979-1994 version has the same superior optics and a focus tab instead of a ring, but has no built-in hood. I'm usually showing the current cosmetic version, made from 1994-today. Leitz / Leitz Canada Summicron-M 50mm F/2 “Leica 1913-1983” This LEICA SUMMICRON-M 50mm f/2 is the oldest optical design in Leica's catalog, having been introduced in 1979. Leica Summicron-M 50mm F/2 “Year of the Rooster” Leica Summicron-M 50mm F/2 “LHSA 25th Anniversary” Leica Summicron-M 50mm F/2 “RPS Royal Centenary” Leica Summicron-M 50mm F/2 “Leica HISTORICA 20th Anniversary” Leica Summicron-M 50mm F/2 Gold “King of Thailand” Leica Summicron-M 50mm F/2 Gold “Sultan of Brunei” Leica Summicron-M 50mm F/2 “150 Jahre Optik” Leica Summicron-M 50mm F/2 “50 Jahre Summicron” Leica APO-Summicron-M 50mm F/2 ASPHERICAL for RED