Sujet : Re: Good glass
De : fred (at) *nospam* fred-smith.co.uk (Abandoned Trolley)
Groupes : rec.photo.digitalDate : 11. Jun 2025, 18:49:15
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <102cfiq$23v24$1@dont-email.me>
References : 1 2 3 4
User-Agent : Mozilla Thunderbird
On 09/06/2025 10:41, Paul Carmichael wrote:
El Sun, 08 Jun 2025 13:32:32 -0500, Bill W escribió:
https://www.flickr.com/photos/wibbleypants/albums/72177720326695050/
>
Photo 1956 baffled me, so I had to google stuff. Now I know that the
farther the camera is from the focus point, the wider the DOF, so I’m
guessing that the camera was farther from the focus point in that photo
than the other two f1.8 photos.
The focus was the same in both - the green bit of the palm. It was me that
moved. The depth of field scale on the lens doesn't go bigger than f4. So
there should be no DoF at all.
Theres some sort of square law at work here ?
I am told that if you focus on something, and then stop down the lens until the DoF extends half way to the camera, then the DoF in the other direction will extend to infinity.
Good glass
Re: Good glass