2005.01.13 13:14 "[Tiff] TIFF - Unknown field with tag 34665", by Claude Houle

2005.01.13 13:22 "Re: [Tiff] TIFF - Unknown field with tag 34665", by Joris Van Damme

I am transforming a TIFF Picture into a JPEG Thumbnail and I get to see this warning: Unknown field with tag 34665 encountered warning.

That's the EXIF IFD tag, see


On the search page of this section, you can, amongst others, simply type your tag code.

The warning doesn't really matter, unless you're specifically interested in the EXIF information of course. Image decoding using LibTiff should still work fine, the warning can be safely ignored.

Joris Van Damme
Download your free TIFF tag viewer for windows here: