20D Photo Details Wrong

[mercphoto]

The photo details of 20D photos are often wrong. For example, I know the flash and color space information is wrong. Don't know about exposure bias. And the focal length, while correct, has an incorrect "guess". The "in 35mm" should be 1.6 times the focal length. (the guess was wrong for the Rebel as well)

[pathfinder]

The photo details of 20D photos are often wrong. For example, I know the flash and color space information is wrong. Don't know about exposure bias. And the focal length, while correct, has an incorrect "guess". The "in 35mm" should be 1.6 times the focal length. (the guess was wrong for the Rebel as well)

I think this has been true for the 10D all along also. Smugmug frequently describes the focal length as shorter than the actual lens focal length and on a 10D this is not correct as Merc has pointed out above.

[Baldy]

I think this has been true for the 10D all along also. Smugmug frequently describes the focal length as shorter than the actual lens focal length and on a 10D this is not correct as Merc has pointed out above.35mm equivalent is hard to guess accurately because the data we're given in EXIF requires a calculation. The caluculation is only accurate if you don't crop your images, and that's why we call it a guess.

For anyone who wants the details, here you go:

http://jalbum.net/forum/thread.jspa?messageID=21281

[miketaylor01]

I only have a standard account so this may be why I cant figure out how to get this to work, but is there a way to display the camera info below every image instead of having to click on the photo info button?:dunno Kinda like they do it on PBase. Thanks

Mike

[mercphoto]

35mm equivalent is hard to guess accurately because the data we're given in EXIF requires a calculation. The caluculation is only accurate if you don't crop your images, and that's why we call it a guess.

I never crop, and the calculation has never been right. :) Is there any reason to continue trying to guess, rather than just stating the focal length as given by the EXIF file? In other words, is there value in having a 35mm equivalent value for the focal length?

[mercphoto]

I only have a standard account so this may be why I cant figure out how to get this to work, but is there a way to display the camera info below every image instead of having to click on the photo info button?:dunno Kinda like they do it on PBase.

Nope.

[Baldy]

In other words, is there value in having a 35mm equivalent value for the focal length?We got tons of requests for it when we didn't have it. I'll have to check and see why the guess isn't correct without cropping on the 20D.

[mercphoto]

We got tons of requests for it when we didn't have it. I'll have to check and see why the guess isn't correct without cropping on the 20D.

It doesn't actually bother me per se. Was just bringing it up only because the info (focal length guess and flash setting) was wrong. I'd rather have work focused on other issues, unless other people are also wanting this same item fixed.

Love the ability to block the display of large images. The new "bulk" tools are great. Only item on my personal wish list is the ability to track sales by gallery. I can retrieve the information myself by manually following the thumbnails back to the originating gallery from the sales detail list, but its a pain.

[onethumb]

It doesn't actually bother me per se. Was just bringing it up only because the info (focal length guess and flash setting) was wrong. I'd rather have work focused on other issues, unless other people are also wanting this same item fixed.

Love the ability to block the display of large images. The new "bulk" tools are great. Only item on my personal wish list is the ability to track sales by gallery. I can retrieve the information myself by manually following the thumbnails back to the originating gallery from the sales detail list, but its a pain.

I haven't actually taken a look at the EXIF data off of the 20D yet, but I'm pretty sure everything we display (except for the "guess") is pulled straight from the photo.

So if there's stuff that's wrong, I think it's possibly a Canon bug or something.

I'll look into it when I get a chance.

Don

[onethumb]

I only have a standard account so this may be why I cant figure out how to get this to work, but is there a way to display the camera info below every image instead of having to click on the photo info button?:dunno Kinda like they do it on PBase. Thanks

Mike

This is the way we used to have it, but we got tons of complaints that it cluttered the page up too much and made it look unprofessional.

Yours is the first I've heard since the change more than a year ago, I'm afraid.

If you have any suggestions as to how we could appease both camps, I'm all ears, but the honest answer is that you're in the minority. :(

Don

[onethumb]

I haven't actually taken a look at the EXIF data off of the 20D yet, but I'm pretty sure everything we display (except for the "guess") is pulled straight from the photo.

So if there's stuff that's wrong, I think it's possibly a Canon bug or something.

I'll look into it when I get a chance.

Don

I just took a glance at some of Andy's 20D photos, and the EXIF data embedded in the photo matches smugmug's EXIF display page exactly.

Can you point me to some photos (which haven't been cropped!) which show a mismatch?

It is entirely possible Canon is making a mistake, but it seems unlikely. If they are, there's nothing we can do about it.

Don

[miketaylor01]

Thanks for the quick response.. Just an option that I have seen on some users pages in PBase that I thought was a cool little reference. No big deal. I can see how providing everything would make the page cluttered.

[onethumb]

I just took a glance at some of Andy's 20D photos, and the EXIF data embedded in the photo matches smugmug's EXIF display page exactly.

Can you point me to some photos (which haven't been cropped!) which show a mismatch?

It is entirely possible Canon is making a mistake, but it seems unlikely. If they are, there's nothing we can do about it.

Don

BUMP!

Can anyone point me to some photos which clearly are shown with the wrong EXIF data on smugmug? I'd like to get this fixed.

Don

[liyifan]

http://li.smugmug.com/gallery/896927
All pictures, cropped in smugmug or uncropped, show strange guess.

[mercphoto]

BUMP!

Can anyone point me to some photos which clearly are shown with the wrong EXIF data on smugmug? I'd like to get this fixed.

Not sure this can be called wrong EXIF data, but try: http://mercphoto.smugmug.com/gallery/851398

Click on exif. Notice the focal length is 135mm (which is correct). Notice the guess is 105mm in 35mm terms, which is very wrong. Should be 216mm (true focal length times 1.6 crop factor). This has been what I have seen wrong most often, the "guess" focal length being very far off. You might want to consider not guessing at all.

[EDIT] Looking back at my original post, I am not seeing an incorrect color space or an incorrect flash mode being reported on this particular image, though I know that was being reported wrong (at least on some images) in the past. This continues to be a low-priority issue for me. As I originally posted, I was bringing this up mostly because it was wrong, not because it was important. :)

[wslam]

I don't understand why Smugmug would 'guess'.
Focal length is focal length.
For guessing, you are really just guessing the 35mm eq FOV of Focal Length. NOT the actual focal length.
Besides, it's ALWAYS wrong (guessing). Why bother? I see this thread goes way back (2004). Time to get rid of the guess or fix it!

[Andy]

I don't understand why Smugmug would 'guess'.
Focal length is focal length.
For guessing, you are really just guessing the 35mm eq FOV of Focal Length. NOT the actual focal length.
Besides, it's ALWAYS wrong (guessing). Why bother? I see this thread goes way back (2004). Time to get rid of the guess or fix it!

Thanks for the feedback, ws, we really appreciate it. You always have the absolute focal length in the exif. The guess, is attempting to approximate the FOV crop of the different cameras. It could be better, yes. BTW, try "critique style" you'll see that it's perfect :wink