D-Lux7: What is the horizontal angle of view at 24mm / 16:9 ratio?

[firoze]

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Hello, on the D-lux7 I presume the quoted 24mm angle of view at the wide setting is for the 3:2 ratio. So what would the horizontal equivalent angle of view be at the 16:9 ratio? Would it be something like a FF 20mm lens?

I know that the diagonal angle of view is constant at all ratios, but the horizontal angle of view will be different for different ratios.

I would be grateful if someone could give me an answer.

Thanks in advance!

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[jankap]

I come to the same result of 20mm. The number of pixels stays the same at 8M for every ratio. For a certain ratio the sensor is larger than necessary therefore.

At ratio 3:2 the focal length is 24mm, at ratio 16:9 we calculate 24 x 3/16 x 9/2= 20,25mm.

[firoze]

6 hours ago, jankap said:

I come to the same result of 20mm. The number of pixels stays the same at 8M for every ratio. For a certain ratio the sensor is larger than necessary therefore.

At ratio 3:2 the focal length is 24mm, at ratio 16:9 we calculate 24 x 3/16 x 9/2= 20,25mm.

Thank you for the calculation confirming it is apporx 20mm.

By the same calculation would I be right in saying that at 75mm zoom and 4/3 ratio, the equivalent horizontal view would be approx 84.37mm? (75 x 3/4 x 3/2 = 84.375).

[jankap]

Good morning (here!). That is the same procedure. Your formula is clearer, for my formula the FLeq(H) = 24 x 9/16 x 3/2. We calculate the equivalent focal length here, the lens itself does not change.

Of course in the vertical orientation the angle of view also changes, for our first case the FLeq(V) 24 x 16/9 x 2/3 = 28,4mm. And for your case 75 x 4/3 x 2/3 = 66,7mm. /Jan

[firoze]

15 minutes ago, jankap said:

Good morning (here!). That is the same procedure. Your formula is clearer, for my formula the FLeq(H) = 24 x 9/16 x 3/2. We calculate the equivalent focal length here, the lens itself does not change.

Of course in the vertical orientation the angle of view also changes, for our first case the FLeq(V) 24 x 16/9 x 2/3 = 28,4mm. And for your case 75 x 4/3 x 2/3 = 66,7mm. /Jan

Hello, and thank you! Good to know the vertical equivalent focal lengths as well 🙂

So essentially we can say that the D-Lux7 has a 20-85mm zoom in the horizontal plane which is quite useful, especially at the wide end, but of course at different aspect ratios. Thanks again!

[jankap]

Does not the camera have a panorama mode too?

[firoze]

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12 minutes ago, jankap said:

Does not the camera have a panorama mode too?

It does have a panorama mode, though I am not sure how well it works in practice (I don't own a D-Lux7).