Although I understand that a 70-200 lens is not ideal for (touring cars) trackside shots, financial constraints have limited my choices, at present to:
70-200mm f/2.8L USM or 70-200mm f/4L IS USM
Which one f/stop or IS?
I intend to use a x1.4 extender and will be shooting during daylight in the UK.
All advice greatly appreciated.