Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Does this work with the digital rebel XTi body and an EF lens obviously (I know not EF-S)?
Document: 28-105mm." So the 18-55 will not work.In addition, the customer's lenses are EF-"S" lens and will not work on non-supporting converters or older digital camera bodies. "This should be on the Amazon page. I'm having to return it. Great disappointment.
This item did not work on the lens I had bought it for - an EF-S 50-250mm zoom. It worked fine on my only EF lens, but at 50mm, it was a waste for me. I sent it back, and will have to concentrate on composing without "super zoom" capabilities.
The 1.4x will attach to the Rebel T4i EOS camera body o.k., but is not compatible with either of my Canon lenses. The short instruction sheet that comes with it says it's compatible only with Tamron lenses (and not for use with digital cameras.) Neither of these caveats are pointed out on the Amazon webpage, which says for Canon-mount lenses. The Tamron site is worthless.
The Tamron teleconverters will not work with Canon's EF-S lens line for cameras with APS-C sensors. The Canon lens will not mount on the teleconverter due to the changed mounting configuration (white dot) on these lenses. The Tamron teleconverter works as advertised with full frame (EF) lenses.
First off! This Teleconverter will only work on EF lenses. ( lens must have the little red dot on lens!) This Teleconverter will NOT work with EF-S Lenses! (The one's with the little white square!) Second! This WILL work on Canon lenses as long as it has the little red dot on it and is a 50mm or larger len's, for example: 50mm, 60mm,70mm, etc.
Tamron AF 1.4x Teleconverter for Canon Mount LensesJust received this item and took a few quick test shots using a Canon 60D. I intended to take this teleconverter on an extended trip to the UK and India, and wanted a little extra reach for the Tamron 28-300mm f3.5-6.3 IF Macro that will be my primary lens: this extender will take it to 420MM (also bringing a Canon EF-S 10-22MM f3.5-4.5 USM in case you're curious.
I was unnecessarily concerned about others' moans that Tamron disclaims digital camera compatability. Mounted between my Tamron 18-270 and Canon T3i, this guy works 100% as advertised... REALLY boosts the reach, but at the expense of ~1 aperture stop and a very small hint of the fuzzies. The auto focus and VC work just fine, and purists can switch to manual focus when racked out if they like.
I would recommend this to anyone who may want to get closer to the subjectI did not know that it was auto focus and was so please when I discovered that.I know little about cameras and equipment and I bought this for my husband and he was more than pleased.
I can use all my EF lens on it. Focus works great also. In fact, when used with my Kipon EOS-m4/3 Canon EOS to Micro Four Thirds Lens Adapter w/ Aperture control, it makes my EPL5 zooms really far using the Canon 100-400mm
I opened the box and saw those descriptions were missing from the Amazon product descriptions:From Tamron manual in the box -"For best results, use the Tamron tele-converter with telephoto lenses ranging from 50mm to 135mm. ""When used on Digital SLR cameras: This teleconverter is not designed for digital use. We do not guarantee its performance when used on Digital SLR cameras."
Answer: yes, it does.