Introduction
Three 35mm photographs from a Carlo walk on 21 April, with commentary on the Padlock close-up.
Padlock
This is padlock on one of the garages at the Coed end of Granville Terrace. It was taken at 19:34 with the 35mm lens in aperture Priority mode – 1/100s at f/2.8, ISO 400. Some extraneous background has been cropped out from the left and bottom.
1/100s at f/2.8. ISO 400
The colours are really nice, but there is a focus problem. I think there are two issues:
Composition Decision-Making
It isn’t really obvious what was meant to be in sharp focus. Is it the padlock, the bolt or both? A bolder, clear decision before taking the picture would help.
Depth of Field
When you’re this close to the subject, even f/2.8 is going to give a very narrow depth of field. The camera was probably only 30-50cm from the padlock. Some figures might help to reinforce this point:
- At 30cm, the total depth of field is only 7.3mm. 3.6mm in front of the subject and 3.7mm behind the subject.
- At 50cm, the total depth of field is 2.15cm. 1.05 cm in front of the subject and 1.1cm behind. That’s still not enough to get the padlock and the bolt.
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