What are the advantages and disadvantages of using lotus mouth and round mouth hoods

I think the lotus cover of FZ1 is the main role is to be cool, the secondary role is to block the sun on sunny days and rain to prevent rain from dripping to the mirror, *** is to block the flash to cause dark corners, if you don't use it or accidentally twist the lotus cover crooked, the result is still a vignetting, I went out twice to come back and found that a lot of ** left black vignets, all because of the accidentally twisted the lotus cover, I really regret that the lotus cover and the round cover can be as long as possible while preventing vignetting at the four cornersMost of the lenses with wide-angle parts use lotus covers, and telephoto lenses mostly use round covers, and the specific situation is determined according to the actual angle of view of the lens, and the lens lens should be matched with the kind that matches. The shorter the focal length of the lens, the larger the angle of view, and the shorter the hood. If the lens hood of a standard lens is used on a wide-angle lens, it will inevitably have the consequence that the image around the frame cannot be formed.

On the contrary, it cannot play the role that the hood should have. When using a zoom lens, it is best to use a self-retractable hood. Lens hoods are widely used for backlit photography and generally avoid glare.

However, if the light source is close to each other, glare can still occur. At this point, you can use your hand to block the hood on the side where the light source is located. Whether the glare is eliminated or not should be observed from the viewfinder.

We know that the longer the hood, the better it is to block out stray light. However, if the flat hood is too long, it will block the four corners of the picture. The position of the four corners of the corresponding picture of the petal cover is concave inward, which can "let go" the light at the four corners of the picture, and on the premise of not blocking the four corners of the picture, the petals are equivalent to extending a section of the lens shield forward, which can provide better blocking stray light than the round mouth light shield.

Theoretically, the lotus mouth should be equal to or superior to the round mouth in all aspects.

There is only one reason for using the round mouth: the front group rotates when this lens is focused, making it impossible to use the lotus cover.

The lotus hood is to prevent glare caused by light entering the mirror barrel...

The round lens hood should be added in any case, one reason --- to protect the lens, the glass end of the lens is very flush with the end of the lens barrel, if the lens encounters something that is not very soft, it will be scratched, scratched or left fingerprints, dirt.

I think the lotus cover of FZ1 is the main role is to swing cool, and the secondary role is to be sunny.

Protect from sunlight and rain droplets.

Go to the Observation Mirror.

At the juncture, *** is caused by blocking the flash.

Vignetting. If you don't know how to use it or accidentally twist the lotus hood crookedly, it turns out to be a vignet, I have it twice.

Hang out and play. When I came back, I found that many ** had left black dark corners, all because I accidentally twisted the lotus cover, and I really regretted it.

Lotus hood and round hood can be compared to.

Hood. To be as long as possible while preventing vignetting at the four corners, most of the lens beams with wide-angle parts are covered with lotus covers and telephoto lenses.

Multi-use round cover, the specific situation is based on the actual angle of view of the lens to determine the hood has a variety of sizes, should be selected with.

Lens focal length. The kind that matches. The shorter the focal length of the lens, the larger the angle of view, and the shorter the hood. Such as.

Standard lenses. The hood is covered.

Wide-angle lens. On the use, it is bound to produce a picture around can not.

Imagery. consequences. On the contrary, it cannot play the role that the hood should have. Use.

Zoom lens. It is best to use a self-retractable hood. Lens hoods are widely used.

Backlit photography. In general, glare can be avoided.

However, if the light source is close to each other, glare can still occur. At this point, you can use your hand to block the hood on the side where the light source is located. Whether the glare is eliminated or not, it is necessary to observe the noise from the viewfinder.

We know that the longer the hood, the better it is to block out stray light. But.

Flat mouth. If the hood is too long, it will obscure the four corners of the screen. The position of the four corners of the corresponding picture of the petal cover is concave inward and can be done".

Get out of the way. The light at the four corners of the picture, without blocking the four corners of the picture, has its petals extending a section of the hood forward, which can provide a ratio.

Round mouth. The hood has a better effect of blocking stray light.

The lotus hood is to prevent glare caused by light entering the mirror barrel...

One reason --- protect the lens is that the glass end of the lens is very flush with the end of the lens barrel, and if the lens encounters something not very soft, it will be scraped, scratched or left with fingerprints and dirt.