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ePz adding incorrect info onto exif


User_Removed 10 3.3k 4 United Kingdom
5 Jan 2013 7:54PM
Whose idea was it to try to generate a 35mm "equivalent" for lens sizes based on exif data?

It's wrong. It wouldn't even matter which EOS body I used it would still be wrong because a 24 lens on a 35mm camera would still behave like a 24! Grin

05-01-2013-19-48-10.jpg



People get confused enough about crop factors as it is without this feature "helping" Wink

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MikeRC e2
9 3.5k United Kingdom
5 Jan 2013 8:31PM

Quote:People get confused enough about crop factors as it is without this feature "helping"


....you got that right Chris....glad I'm not the only one in the dark Smile
arhb e2
7 2.4k 68 United Kingdom
5 Jan 2013 9:06PM
Loving the page 'curl' Chris, however the corners of the drop shadow look a bit too rounded.
User_Removed 10 3.3k 4 United Kingdom
5 Jan 2013 9:07PM
That's due to the bulb and lampshade I use in here...
Ade_Osman e2
11 4.5k 36 England
5 Jan 2013 10:32PM
You want to see the EXIF data my Stealth Cam generates Chris, I think EPZ's system is completely baffled by it Tongue

Ade
lobsterboy e2
10 14.2k 13 United Kingdom
5 Jan 2013 10:39PM
That's strange Chris - my 5DmkII and 24-105 don't show a 35mm equivalent.

I did some Googling and other sites where people report a similar problem say it is due to the software/processing the user used.
No idea if that is true though...
6 Jan 2013 4:13AM
Website (and not just EPZ) exif data can be very misleading, and not just focal length

But really the crop factor/equivalent isnt all that hard to understand.

A Full frame digital (or 35mm film) camera records the focal range of the lens, a Dx (or whatever crop sensor) crops an image to the point where if you compare a full frame image to a crop frame sensor image, the latter would appear to be a longer focal length (or equivalent to one)

But now that mega pixels get higher and higher, more and more images get cropped in editing so what Exif says is rarely what you see. Similarly with esposure, aperture, etc
User_Removed 10 3.3k 4 United Kingdom
6 Jan 2013 9:29AM
Lob, site is deffo doing it, for example

Paul, thanks but my point has nothing to do with how misleading EXIF data can or can't be or to do with how crop factors work. My complaint is that the site is taking accurate data and making it inaccurate. What good reason is there for doing that?
lobsterboy e2
10 14.2k 13 United Kingdom
6 Jan 2013 9:42AM

Quote:Lob, site is deffo doing it, for example


But it hasn't done it here .

I don't know if Epz is using the same library or not but according to this it could be a bug in the camera firmware.
arhb e2
7 2.4k 68 United Kingdom
6 Jan 2013 11:10AM
I'm also not getting the '35mm equivalent' info coming up in my epz exif data.
What's more, I've recently stopped using ps 'save for web' option, as that process was over-saturating my images, leaving me to readjust after process.
I have now made an alternative action, where the saturation problem has gone, but....
epz exif data now knows the camera and lens I use without me filling that info in manually, when I upload to epz.
JJGEE 9 6.4k 18 England
6 Jan 2013 11:18AM
And it is not doing the 35mm equivalent for my full frame Sony A900
6 Jan 2013 1:45PM

Quote:My complaint is that the site is taking accurate data and making it inaccurate. What good reason is there for doing that?


I wouldnt take it personally, haha.

But yeah, i agree that it could cause confusion even if the Exif you upload is 'accurate'. However, i dont really see the need for Exif info to be uploaded at all (other than perhaps what camera/lens was used) as unless an image is posted without any editing or cropping, the Exif isnt accurate. If anything it can be used as a very rough guide, but rarely gives any helpful info to anyone other than the uploader of the image (who obviously has the original image on their hard-drive and knows everything that went into a shot)

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