Photography: Fotasy LW405 40.5mm Wide Angle Metal Lens Hood Shade for Leica, Contax Zeiss, Voigtlander and Other Lenses - Photography Accessories INC

Photography: EasyFoto 40.5mm Vented Metal Lens Hood Shade for Leica, Contax Zeiss, Voigtlander Lens - EasyFoto

Photography: PLR Optics 40.5MM Lens Hood For The Nikon 1 J1, J2, J3, V1, V2, V3, AW1, S1 Digital SLR Cameras Which Have Any Of These (10-30mm, 30-110mm, 10mm) Nikon 1 Lenses - PLR

Wireless: Replacement 40.5mm-52mm Camera Metal Filter Step Up Ring Adapter - Gino

Photography: HeavyStar Dedicated Metal 40.5mm Lens Hood w/Hood Cap - S&W Photo Equip. Co

Toy: Leica M 40.5 mm Metal Vented Lens Hood Shade - bauble 213

Single Detail Page Misc: 40.5mm Tulip Flower Lens Hood For Nikon 1 V1 10mm 10-30mm 30-110mm - imported

Car Audio or Theater: RainbowImaging LH-40 Lens Hood for Olympus M.Zuiko 14-42mm F3.5-6.6 II - Consumer Electronics Store

Health and Beauty: unihandbag Center Pinch Snap on Front Cap For Sony Canon Nikon Lens Filters 40.5mm - unihandbag

Photography: EzFoto 40.5mm Tilted Vented Metal Lens Hood Shade for Leica, Contax Zeiss, Voigtlander Lens - EzFoto

Photography: Nikon AF-S DX VR (Vibration Reduction) Zoom Nikkor 55-200mm f4.0-5.6 G IF -ED Lens With Nikon Lens pouch , Nikon Lens Hood , Set of 3 High Resolution Filters , Lens Cap Holder . Lens Cleaning Kit .For All nikon Digital SLR cameras - Nikon

Sports: Bushnell AR Optics TRS-32 Red Dot Riflescope with 30mm Tactical Ring, 1x 32mm - Bushnell

CE: Stencil Metal Lens Hood for Leica 40.5 mm Lens (Black) - HONG KONG

Wireless: Black Screw Mount 40.5mm Metal Hood for Leica Summicron Elmar Lens - Gino

Photography: EzFoto 40.5mm Silver Tilted Metal Lens Hood Shade for Leica, Contax Zeiss, Voigtlander, Pentax Q prime, NIKKOR 1 Prime Lens - EzFoto

CE: 40.5-46mm Anodized Aluminum Step-up Ring Adapter for Cameras (Black) - Anythinginthai

Photography: JJC LH40 Professional Replacement Lens Hood LH-J40 For Olympus Zuiko 14-42mm F3.5 (Black) - JJC

Single Detail Page Misc: 37-40.5 MM 37 MM- 40.5 MM 37 to 40.5 Step Up Ring Filter Adapter

Wireless: Black Aluminum Wide Angle 40.5mm Thread Screw In Universal Camera Lens Hood - Gino

CE: Center Pinch Snap on Front Cap For Sony Canon Nikon Lens Filters 40.5mm HOT - leadingstar

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Lens Hood 40.5Mm Popular Q&A

Q: What Are Lens Hoods?
A: Lens hoods are conical shaped accessories that attach to the end of a lens. These hard plastic lens hoods typical come in two shapes: tubed or petal. Though mos... Read More »

Q: How to Design a Lens Hood.
A: 1. Decide on the material to use. If the lens hood is being used outdoors, then it will need to be able to withstand the different weather you may encounter. 2.... Read More »

Q: Why a petal hood for a lens?
A: Answer The petal hood was designed so that material is removed which would block light at the corners of the frame. But compared to a shorter round hood that is... Read More »

Q: Why a petal hood for a lens?
A: The petal hood was designed so that material is removed which would block light at the corners of the frame. But compared to a shorter round hood that is all on... Read More »

Q: Why are lens hoods shaped the way they are?
A: This design gives maximum blockage of stray light into the lens without causing vignetting as opposed to a fully cylindrical/conical design. You can see that th... Read More »