Autofocus for the 16mm Telephoto Lens Mounted on the Raspberry Pi HQ Camera

Re:Autofocus for the 16mm Telephoto Lens Mounted on the Rasp... by pmiller2 on Thursday December 31, 2020 @04:37PM (#25597446)

So, wait... are you telling me that my Nikkor 105mm f/2.8 macro lens is really acting like a ...uses 35mm equivalent calculator... 160.65mm f/4.28 on my D3400?

Edit: updated to clarify exactly what calculation I was doing.

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Re:Autofocus for the 16mm Telephoto Lens Mounted on the Rasp... by roelschroeven on Thursday December 31, 2020 @05:30PM (#25597922)

It has the same (approximate) field of view on your D3400 as a 160.65 mm lens would have on a full frame camera, yes. 157,5 mm come to think of it actually: as far as I know the crop factor on Nikon crop cameras is 1.5. On a medium format camera you would need an even longer lens to get the same field of view.

I'm not sure about the aperture equivalent. Aperture influences both exposure and depth-of-field, and I don't think they vary in the same way between crop cameras and full frame cameras.

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Re:Autofocus for the 16mm Telephoto Lens Mounted on the Rasp... by pletnes on Thursday December 31, 2020 @05:21PM (#25597851)

The focal length is a property of the lens and as such irrespective of which camera it is attached to.

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Re:Autofocus for the 16mm Telephoto Lens Mounted on the Rasp... by pmiller2 on Thursday December 31, 2020 @05:26PM (#25597895)

I know that. 35mm equivalent focal length tells you about the image area and effective aperture.

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