Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens.
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Comments about Pentax 49mm Rectangular Lens Hood:
easy to attach to the F and FA 50mm f1.4 or 1.7, very nice design, definitely makes the 50mm a little more interested and adds some flavor to it...
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Comments about Pentax 49mm Rectangular Lens Hood:
I bought this lens hood to go with my camcorder and an adapter ring from 46mm to 49mm to fit the filter size on the camera, it works very well. It was a little snug on the adapter ring but I got it to fit and it works fine if you don't plan on taking it off the adapter ring but I think the adapter was a little big in the first place. Overall it works great and protects the lens as well.
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Comments about Pentax 49mm Rectangular Lens Hood:
This Pentax Square 49mm hood was purchased as a lens hood for a SONY 50mm 1.4 With the addition of a 49mm UV filter, this lens hood was a perfect fit.
Also make the lens more impressive looking on the retro side.
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