jwhig

I had the same dilemma a few months ago but I did not want yet another lens to lug about.  I therefore looked at getting a 2x converter to add to the 70-200 f/4 but that is pushing the autofocus ...

Has something happened to Giottos? Their products are no longer listed by the major UK retailers and their UK website has gone down. The US site appears to be running. I have not seen any news ...

Apart from the fact I don't own the 100 f/2.8, I am in exactly the same position. I bought the 24-70 f/4 to replace the 24-105 f/4 .  The 24-70 f/4 is somewhat better than the 24-105 f/4 but I ...

"Canon's new EF 11-24mm F4 L wideangle zoom lens is Canon's widest ever rectilinear zoom by some margin"

You mean the widest FULL FRAME zoom lens. The 10-22 EF-S is wider.

It seems that you really have lenses covering the range you need and just want to blow some cash.  If you think the Tokina is not too sharp, then look at a wide angle zoom such as a 16-35 or 17-40 ...

Obviously important to keep it away from the crows!

Don't leave it in the sunlight!

Photo Plus also said that the Kenco converter that matches the Tamron lens (the 70-200 f/2.8) gave poor results with that lens. jwhig

It is suggested in the December 2014 edition of PhotoPlus (a UK magazine for Canon DSLRs only) that you should stick to the same brand teleconverter as the lens.  In their tests they found some ...

I don't trust myself with very slow shutter speeds at my age. See this review for what he thinks of the IS performance: http://www.the-digital-picture.com/Reviews/Canon-EF-24-70mm-f-4-L-IS-USM-Lens ...

I have this lens. How slow a shutter speed you can hand-hold depends on several factors, the main ones being: (1) Focal length.  You can use a lower shutter speed at 24mm than at 70 mm.