Where is Focus Distance in EXIF data.
Oct 1, 2023 12:29:06 #
gvarner
Loc: Central Oregon Coast
Architect1776 wrote:
Then why do my cameras provide distance in the EXIF?
I suspect it’s for the user's reference, not for the camera's. We might want to know how far away something is but the camera sensor uses its own algorithm to determine what’s sharp and what’s not. We like to see distance marks on the lens but I don’t think they’re not all that accurate. The bottom line is that some cameras report distance, some don’t.
Oct 1, 2023 12:39:27 #
selmslie wrote:
Actually, not far off. If the information is available for the EXIF, why not display it on the screen?
In fact, in manual focus mode mode, my A7 III displays the focus distance in meters under a moving slider. My Z7 shows the slider but only no numbers.
In fact, in manual focus mode mode, my A7 III displays the focus distance in meters under a moving slider. My Z7 shows the slider but only no numbers.
Depends on the camera if it is available............
Oct 1, 2023 12:41:19 #
Architect1776 wrote:
Then why do my cameras provide distance in the EXIF?
Yours may, not all cameras provide it.
Oct 1, 2023 16:30:22 #
BebuLamar wrote:
I wish that camera manufacturer would make cameras that display the distance that lens is focused at on the LCD or viewfinder. I can estimate distance quite well but I can't set that distance on the lens as well using the marking on the focusing ring (and of course many new lenses don't even have any distance marking on the focusing ring).
On my latest Nikon lens they thought it important enough to have the 'focused distance' displayed on a small switchable dimmable LCD. From what I have read it's there for those that like to use hyperfocal distance, but the Exif I've checked to date still shows 'unknown' in the field.
Oct 1, 2023 17:03:06 #
BebuLamar wrote:
Basically I want to set the focus distance without having to point the camera at the subject. I would be shooting from the waist and not looking at the camera. I would prefer the distance display on top of the camera but if I have to see it in the viewfinder then I would point the camera perhaps down look at the viewfinder set the distance that I know to be the correct distance then the wear the camera at waist level and release the shutter.
Clearly, you are lacking the appropriate lenses for your purpose. MF operation such as youve described is best executed by using MF lenses. (See pix below.)
TT Artisans - Leitz - Voigtlander (all for EVFs)
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SL II Voigtlander (for Nikon or Canon SLRs) adaptable to nearly all brands of EVFs.
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Cine lenses are excellent dedicated MF lenses. (for all EVFs and SLRs)
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Oct 1, 2023 17:08:41 #
Grahame wrote:
, but the Exif I've checked to date still shows 'unknown' in the field.
It may be in the raw file but not in the JPEG.
Oct 1, 2023 17:53:49 #
selmslie wrote:
It may be in the raw file but not in the JPEG.
It was the raw file that i checked.
Oct 1, 2023 18:05:22 #
Grahame wrote:
It was the raw file that i checked.
If the lens can display it should be able to pass it to the body.
My old Df can record it. How old is your camera?
Oct 1, 2023 19:17:06 #
selmslie wrote:
If the lens can display it should be able to pass it to the body.
My old Df can record it. How old is your camera?
My old Df can record it. How old is your camera?
It's a Z8 with the Z 70-200. I'm certain as with many lenses this is passed to the body but was surprised the value was not shown in the Exif, not that I would use it.
I recall reading the 'focus distance' often within Exif, but can not recall what specific rigs or even if mine.
Oct 1, 2023 19:39:29 #
Grahame wrote:
It's a Z8 with the Z 70-200. I'm certain as with many lenses this is passed to the body but was surprised the value was not shown in the Exif, not that I would use it.
I found it in the original NEF using RawDigger's EXIF button filtering for "dist":
Not sure if other EXIF viewers are recognizing it.
If you embed the NEF data in a DNG it might not get picked up depending in what did the embedding.
Oct 1, 2023 21:26:27 #
Mr Bill 2011
Loc: southern Indiana
Alphabravo2020 wrote:
I'm thinking that the focus distance should be recorded somewhere in the image EXIF data as long as the lens and body are communicating. In this case I used a Sony A7iv and a Sony 50mm GM f1.2.
Shouldn't the camera be able to figure out the focus distance from the information it gets from the lens? Anyway I don't see it there or maybe I don't recognize what it is called.
Gratuitous example image supplied upon request.
Shouldn't the camera be able to figure out the focus distance from the information it gets from the lens? Anyway I don't see it there or maybe I don't recognize what it is called.
Gratuitous example image supplied upon request.
I'm grateful if it just shows the focal length used on a zoom lens.
Oct 2, 2023 12:55:38 #
User ID wrote:
Im wondering what use the focus distance would ser... (show quote)
Shoot planning purposes. I scouted a location and have the exact angles using a 50mm that will be used for a model shoot. I am considering using a 35mm lens because the dress will be massive and I would like to check the recomposition.
When shooting wide open with a fast lens I'd think that the distance to the focus point should be precisely known by the camera since the depth of field is only a few inches.
Oct 2, 2023 17:30:56 #
awesome14
Loc: UK
EXIF data is not standardized. Different cameras put it in different places in the image file, and include whatever information they want to be included. Third party EXIF viewers might not show all the EXIF data.
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