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The Canon RF 24-105 F2.8L IS USM Z jumped into the limelight with the latest announcement. This lens may not be for you. It’s big, it’s heavy, and pricey and Canon really wants this lens primarily for the cinema cameras. From all reports it’s not fully parfocal (which means the focus will change as you zoom), but it’s also not the insane price that fully cinema lenses cost either. But with the price and complexity of the addon power zoom accessories, it’s safe to assume that Canon is gearing this lens for its RF C line and hoping to find that balance between performance, price and usability for the cinema line. Canon has certainly flexed its engineering and optical talent and created a lens that has never been done before. We can all be excited to see Canon push the boundaries, regardless of this being a lens in which we’d actually purchase.
Now there are MTFs to look at, and we have a few 24-105s in Canon’s RF arsenal to compare against, but the one that it should be compared against is the Canon RF 24-105 F4.0L IS USM. It should be fairly noted that Canon spared no expense and no size / weight limitations on RF 24-105 F2.8L it seems, so without even comparing the charts, I would honestly expect the lens to perform nearly as well as its slower brother.
We have to bear in mind that with these MTFs we are comparing the lens wide open, but we can see that the new RF 24-105 F2.8L IS USM Z holds its own showing better contrast (black lines) throughout the zoom range, resolves more (blue lines) in the corners at 24mm and also at 105mm. While the lens is expensive, big and heavy, it matches expectations of being better than the proceeding Canon RF 24-105 F4.0L. To achieve that performance required a much more complicated lens as shown below. The left lens is the F4.0L and lens to the right is the F2.8L.
For some reason the english speaking Canon websites are lacking on details, so we had to pull that from the Japan website. The elements are as follows;
Light green are aspherical elements
Dark green are UD elements
Red Square surrounds the IS elements that shift with movement
Dashed red line is ASC or Air Sphere Coatings
This is a landmark lens from Canon. One user commented somewhere that for the longest of times, people said they wanted this lens, and others said it would be big, heavy, and expensive. Guess what? It is. But innovation comes at a premium, and if this is a lens you have been waiting for, then Canon made your dreams come true. You can also use how you feel the Canon RF 24-105 F4.0L’s performance as a basis of comparison as the new lens should be better. So if you are satisfied with the performance of that lens, you should be pleased with the new RF 24-105 F2.8L.
Preorder the Canon RF 24-105mm f/2.8L IS USM Z
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