Compensate for extenders

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andersl

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Feb 23, 2008
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Uppsala, Sweden
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Hi!

I've got two extenders, a Kenko x1.4 and a sigma x2.', which I use together with by "magic drainpipe" (Canon 8'-2''/2.8L). Unfortunately, the camera does not register the use of the extenders in the EXIF metadata information.

Is there a way in Lightroom to allow me to manually specify that I've used a extender, and update the aperture and focal length information automatically?

Also, in order for me to find the pictures where I've used the extenders, I would like to inspect some kind of "incoming light value", i.e. a combination of ISO, aperture, and the amount of light in the picture. That way I could inspect a number of photos taken in the same lighting conditions, the ones with lower values are the ones where an extender have been used.

If this does not exist, would it be theoretically possible to write a plug-in for it any of these things?

-- Anders

Ps. I just realized that I would be a nice effect to sort all my photos after the incoming light values, that way I would get all my really dark photos in one end and the ones taken in really bright light in the other.
 
Right now, you would need to use a third-party EXIF tool such as exiftool.

I wouldn't even touch something with a stick that would change the original file, I was hoping for a Lightroom solution to this...

Oh, well, I guess it's time to send another couple of feature requests to the big A...

Thanks!
 
I've got two extenders, a Kenko x1.4 and a sigma x2.', which I use together with by "magic drainpipe" (Canon 8'-2''/2.8L). Unfortunately, the camera does not register the use of the extenders in the EXIF metadata information.

Is there a way in Lightroom to allow me to manually specify that I've used a extender, ...


-- Anders

I have created a plug-in (in french) for this use, a couple of month ago. Late in February, i translate it in english.
It's possible to see the french screen capture of the plug-in on this site.

http://www.passionphotonature.net/forum/viewtopic.php?t=15757

Focal Extender Plug-in have a metadata tagset, allow searching and filtering, and creating smart collection on his data.

Allow me a couple of weeks to put it on my web site via Paypal.
 
Another way might be to simply add keyword tags to the appropriate photos after importing them. You could then filter the results by keyword and only get the shots with extenders.

Norman
 
I have created a plug-in (in french) for this use, a couple of month ago. Late in February, i translate it in english.
It's possible to see the french screen capture of the plug-in on this site.

http://www.passionphotonature.net/forum/viewtopic.php?t=15757

Focal Extender Plug-in have a metadata tagset, allow searching and filtering, and creating smart collection on his data.

Allow me a couple of weeks to put it on my web site via Paypal.

YES! This looks exactly what I was looking for! Does it change the focal length and aperture value as well?
 
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