If you’ve ever used a big 400mm f/2.8 or 600mm f/4 lens, you’ll know exactly how heavy these prime optics are. Well, Canon has broken new ground by announcing the world’s lightest 400mm f/2.8 and 600mm f/4 lenses, drastically reducing their weight when compared to previous versions.

So, exactly how much weight has been shed? Well, the new EF 400mm f/2.8L IS III USM’s tips the scales at 2840g, with the previously version weighing 3850g. Meanwhile the EF 600mm f/4L IS III USM’s weight has dropped from 3920g to just 3050g.
Check out this intro video about the lenses.
Both lenses are part of Canon’s high-performance L-range and feature 5-stops of image stabilisation – an important feature when working with longer focal lengths where shake is more of a risk. Both lenses come in the famous Canon white finish, but colour scheme does more than look good – in fact, Canon explains it acts as a thermal insulation coating to ensure the lenses operate in all temperatures.

As you’d expect, both the EF 400mm f/2.8L IS III USM and the EF 600mm f/4L IS III USM are weather-sealed against dust and moisture and feature Canon’sSubwavelength Structure Coating (SWC) to reduce flare and ghosting. Each lens also features a nine-bladed diaphragm which should produce some excellent bokeh.

Videographers should know that both lenses provide pull-focus effects with power focus controls and focus presets, which Canon says is excellent for creative shot making. Now, as both these lenses feature cutting-edge technology and break new ground in weight and dimensions, you’d expect a juicy price-tag and Canon doesn’t disappoint. Both lenses are available from December with the EF 400mm f/2.8L IS III USM price at £11,999.99/ €13,999.99 and the EF 600mm f/4L IS III USM costing £12,999.99/ €15,199.99.