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Moderated by: chrisbet,

iPhone exif

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Posted by Eric: Tue Dec 21st, 2021 00:11

1^st Post

Interesting exif numbers when an iPhone chooses the settings…..

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Compared to a mirrorless camera…

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Eric

Posted by Eric: Tue Dec 21st, 2021 00:21

2^nd Post

Sorry…saw this in the archive while furkelling for the above bird shot…and couldn’t resist it.

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Eric

Posted by chrisbet: Tue Dec 21st, 2021 12:00

3^rd Post

I have noticed this too - obviously the f number is fixed but the ISO seems to be set typically at a low number and the exposure time is some weird number like 1/1232

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If it is broken it was probably me ....

Posted by Eric: Tue Dec 21st, 2021 17:02

4^th Post

The thing I need help with is the exposure value difference between two cameras on what was (although different days) similar lighting.

The iPhone used 1/1232, the Fuji used 1/800…….that is 1/2 stop LESS on the iphone.
The iPhone used f1.8, the Fuji used f9……that is 41/2 stops MORE on the iphone
The iPhone used iso 32, the Fuji used iso1000….that is 5stops MORE on the iphone.

Summing up the iphone gained 9 stops of exposure value over the Fuji.

On the goose image using the Sony the difference was ‘only’ 7 stops.

I seem to be missing something. How can one camera record the same degree of correct exposure using 7 - 9 stops less than another camera?

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Eric

Posted by chrisbet: Tue Dec 21st, 2021 22:21

5^th Post

Sensitivity or sheer size of the sensor - phone sensors gather typically 4.5 stops less light.

Also phones do a lot of processing of the image - some even do internal focus stacking.

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If it is broken it was probably me ....

Posted by Eric: Tue Dec 21st, 2021 23:13

6^th Post

chrisbet wrote:
Sensitivity or sheer size of the sensor - phone sensors gather typically 4.5 stops less light.

Also phones do a lot of processing of the image - some even do internal focus stacking. Not sure I understand that?
I BELIEVE my FX sensor gives the same exposure settings as the DX sensor for the same lighting? (Need to treble check that belief)

I wonder if Jeff, who is now using the 4/3 Olympus, has seen an increase in ‘light gathering’ over his Nikon DX models?
It could be a big advantage for bird photography (along with the 2x multiplier effect) if it gives better performance than FX and DX in low light!

EDIT: Hmmm …. https://www.wired.co.uk/article/phone-camera-vs-dslr-cameras

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Eric

Posted by blackfox: Wed Dec 29th, 2021 13:05

7^th Post

I dont really look at exif these days Eric , I'm now on the third iteration of olympus the omd1-mkiii and once set up correctly just does the job . my main lens is the olympus 100-400 which gives in FF terms 200-800 thats more than adequate for my needs .it will take a 1.4 tc but I have now sold mine as it was hardly used .. the camera and lens combo weighs in at just under 2kg and coupled with the superb I.S systems of olympus and full water resistance features means these days I go out with just the camera and lens .. no bags , no covers ,no tripods or monopods and simply enjoy what i'm doing . while the A/F is not as good as some other brands I find that I can track b.i.f easily handheld using a single point A.F .
I now also have a good collection of the older f2.8 four thirds lenses that were in there day top models and are more than adequate for my needs ,I went out the other week to do the town xmas lights with a 11-22 f2.8 lens and took a load of shots hand held in total darkness that were razor sharp ..

I also now have the i.phone 12 which I often forget to use but as you have noted works extremely well

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