What is type of lens and mirror if focal length is 15 cm?

since the focal length is negative i.e. f=-15 cm ,the spherical lens is concave lens as the focal length is negative for diverging lens and in case of mirrors, it is convex mirror where the focal length is negative.

What is the power of lens when focal length is 15 cm?

therefore the power of the lens is 0.067.

What is the best focal length for general photography?

Simply put, you can’t go wrong with a 50mm prime lens for general shooting. For most camera manufacturers, you can pick up a 50mm f/1.8 lens for very little money. This focal length is great for unexpected scenarios and the cost effectiveness makes this type of lens very attractive for casual shooters.

What is spherical mirror and a thin spherical lens have a focal length of 15 cm what type of mirror and lens are these?

Answer: The type of mirror is concave mirror.

Are thin lens and a spherical mirror have a focal length of 15 cm each?

Both are convex. The lens is convex and the mirror is concave. The lens is concave and the mirror is convex.

Where should the object be placed in case of mirror of focal length 15 cm so that magnification of 1 is obtained also give reason for your answer?

Object distance, u =? Thus the object should be placed at a distance of 30 cm from the lens on the left side. Since, magnification is positive, we can say that the image is erect and virtual.

At what distance from a concave lens of focal length 15cm an object should be placed to form an image at 10cm *?

30 cm
So, the object is placed 30 cm away from the concave lens.

What focal length do photojournalists use?

2. 35mm. 35mm is a classic focal length for many photojournalists and street photographers.

What focal length looks most natural?

Personally, but that’s my unimportant opinion, a 28mm lens offers the “most natural perspective” that reflects the way the human eye sees most naturally. Seeing through and composing with a 28mm lens is like seeing it with your own eyes. A 28mm lens on full-frame just seems natural, closest to real life.

What is normal lens for APS-C?

The “standard” or “normal” focal length that gives a similar field of view as that of the human eye is between 45-55mm depending on who you ask. On an APS-C sensor the equivalent range would be range would 28-34mm.