Originally posted by sebberry Thanks for the feedback everyone, and thanks Gary for the shots! You might want to post one or two here so people can see the results
I had, like others, read some post about TC's not working well with the 50-135. I just tried it myself. Glad i did.
I have the Tamron 1.4 with power zoom contacts, enabling SDM. Today in my area its very gray with constant rain, noon. I focused on some very fine branches on the side of a tree abt 35 feet away. The SDM locked but when i checked the image at 8X magnification on the LCD, it was not acceptable sharpness. When i manually focused, i got an acceptable sharpness at 8X LCD zoom (equiv to 100% crop, i believe) This was at 1/250 shutter, 2.8 aperture, and 800 ISO, handheld.
This is great news. I have no doubt in normal daytime lighting that this combo would focus on SDM. And even in less light, i could always use manual focus with this combo. And as someone else said, the 50-135 is far lighter than a 70-200 to carry around.