« on: January 09, 2012, 08:20:05 AM »
That was cool. I've been trying to do one of these too, but so far no luck. My timer crapped out after 2 hours then continued after 3 hours again. I think my dogs are involved somehow.
This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Would somebody care to explain to me what this "f/8 AF limitation" is, please?
Does it mean autofocus won't work if you set your aperture smaller than f/8?
No, it just means that if your lens largest aperture is smaller than f/5.6 (next step is f/8 typically) it can't autofocus. Focusing is always made at largest aperture, the lens is stopped down to the target aperture when taking the picture.
Lenses don't have as small as f/8 natively, but with teleconverters you get it, 1.4x adds one stop, 2x two. So if your camera cannot do f/8 autofocus you cannot get autofocus with a 2x teleconverter on an f/4 lens or 1.4x on an f/5.6 lens, which can be a limitation for especially wildlife photography. 2x on 500/4 to get 1000/8 with autofocus can be a nice option to have. Or on the low end 400/5.6 => 560/8.
Hdew are great, prices are unbeatable £1425 for a 5d2, £655 for a 24-105. Hong kong imports with duty paid, but you can visit them at their Surrey office and pick up in person before you have paid.
I highly recommend them.