This exercise was all new to me, immediately showing me that there is lots I have to learn. Perhaps before thought of as trivial, but now knowing the ratio of focal length from lens to sensor/film along with from eye to printed image seems to help me piece things together.
I think of myself as having a good background knowledge of the camera and its workings along with the results to expect from it. But these little things just help to complete small grey areas I pushed out of mind.
So I just took the desired photographs using a simple view of my garden fence,
Image 1: Standard 45mm
Image 2: Wide 24mm
Image 3: Zoom 70mm
With the focus point being the thermometer face for all the images, each was taken from the same place. Printing these to 8x10 paper and placing them in front of the same scene from the same point I was intrigued to discover the viewing distance from eye to image was a x10 ratio.
So for the standard 45mm shot (Image 1) the distance was 45cm (450mm)
For the wide 24mm shot (Image 2) the distance was 24cm (240mm)
And for the zoom 70mm shot (Image 3) the distance was 70cm (700mm)
The standard focal length shot was a very comfortable viewing distance with the wide being slightly too close and the zoom shot being far from comfortable good arms length away.
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