What Does Canon Ef Mean – Here’s a fun fact: Canon’s EF lens mount system is almost exactly like mine. I was born in December 1987, and Canon launched its first EF mount camera, the EOS 650 film SLR, just three months later. At the time, it was Canon’s first new lens in nearly 20 years, and now, 33 years later, it and I are still kicking. One of us, however, is starting to lose some relevance.
Canon introduced the RF lens mount with the new EOS R full-frame camera in 2018 and has since dedicated many of its innovations to this format. Canon’s key word is that production of new EF lenses has been delayed by the release of many RF lenses, and new RF lenses have come at a good clip. Canon’s first-party RF lineup now stands at sixteen lenses, with many more announced.
What Does Canon Ef Mean
That’s not to say Canon’s EF lens line is dead, though. Despite persistent rumors to the contrary, Canon continues to develop most of its existing EF line. In addition, given the existing products and the market is still viable, even if Canon announces tomorrow that it has stopped all production of EF lenses, it will be simple that only EF will be a good photographer for the future, Even if you live. Work with adapters on physical RF.
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So, while the transition to RF lenses may be inevitable, it certainly won’t be quick or cheap. Most Canon shooters will probably choose a better method: first upgrade their body and shoot with adapters, then upgrade their EF lenses to their new RF equivalent if necessary. How do you decide what to upgrade first? Which lenses are worth the investment?
To help answer that question, here’s a comparison of a few of Canon’s most popular EF lenses and their RF mount alternatives.
Starting with the obvious, the Canon 24-70 RF version has 5-axis optical image stabilization. This may not be important for everyone, but for wedding photographers, journalists or other people working 24-70 non-essential, it can be a plus. People who need a 24-70 usually use a hand-held with good lighting, and in this case the ability to shoot in slow motion without setting the camera is the difference between a voluntary shot or a miss.
Optically the RF 24-70 appears to be on par with the EF version, which is arguably the highest resolution mid-range zoom ever made. Depending on the focal length, the RF may even be slightly sharp in the corner.
Canon L Lens
Bokeh also looks good, with both lenses showing circular bokeh thanks to their nine circular apertures. Vignetting is a bit more noticeable in the RF version than the EF, but, in my experience, nothing that can’t be compensated for in post. In short, if you’re happy with the performance of the EF 24-70, you’ll be happy with the RF and vice versa.
Autofocus is another area where the RF 24-70 has a leg up on the EF version. The new RF Nano USM system, although it looks like a useless business, actually has a good effect on the AF sound level and speed, especially in continuous mode. Along with the Canon EOS R5 camera, I also found the RF lens to be better at face and eye tracking than the EF.
However, these improvements come at a price. Unlike the EF version, the RF 24-70 is an all-metal focuser, meaning the focus ring has no control over the lens. All analyzes are conducted electronically.
Although some may find this to be a drawback, I personally like it. After some practice with the lens and some digging in the menus to dial in your favorite setting, the reflection isn’t as good as it seems at first. And the flexibility allowed by the focus from the wiring system is worth the learning curve.
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Users can adjust the conversion rate of the lens RF, for example, or even temporarily engage manual focus in AF mode without changing the lens body. The RF version has a closer focus distance of about 7 inches compared to the EF.
You can try the Canon EF 24-70mm f/2.8L II for yourself at LensRental here or the Canon RF 24-70mm f/2.8L IS here.
Part of the reason Canon introduced the new lens with their transfer to the mirrorless body is to allow more flexibility in lens design. The RF mount’s short flange focal distance allows the rear subject to be closer to the sensor, so less subject matter is needed on the lens, which can result in sharper, shorter lenses. Nowhere is that clearer than the Canon RF 70-200 f/2.8L IS lens.
While it can handle the EF 70-200 f/2.8 on a DSLR body like the Canon EOS 5D IV, it’s not the best experience. Even with IS capabilities, shutter speeds will be limited, especially at 200mm. Put the same lens on a Canon R5 with an inch-thick adapter and the camera is almost impossible to use without it. In practice, not only is it difficult to run, it even feels like you will hurt the mount.
Canon Mount Adapter Ef Eos R 0.71x 4757c001 B&h Photo Video
Changing the original RF mount on the R5 to the 70-200 is a night and day difference. Although the numbers may not seem that impressive (about a pound lighter and about two inches shorter, not including the adapter), the actual shooting experience with the RF is far from over. so much fun
In fact, the RF version has a telescoping mechanism, which is something that many photographers don’t like and is not an issue with the EF version. It doesn’t extend much though, and doesn’t affect balance too much, so I wasn’t bothered by it during my time with the lens. This is something to be aware of, though.
As with the 24-70s, the visual difference between the EF and RF 70-200 is minimal. In short, the 70-200 is better by most metrics but not by many that will show up quickly in most situations. The viewing angle is slightly better, especially at focal length, and the autofocus is slightly faster.
However, the main point is that Canon achieves these results in tandem with more controllable paper. Among the three lenses here, this is the one I recommend upgrading to if you use the 70-200 with the adapter on the RF body.
Canon Ef 100 400mm F/4.5 5.6l Is Ii Usm Lens With Accessories
You can try the Canon EF 70-200mm f/2.8L IS III for yourself at LensRental here or the Canon RF 70-200mm f/2.8L IS here.
While the 50mm f/1.2 may not be part of every photographer’s kit, there are some who would consider it essential, especially for portraits. If you are one of them, you can easily understand that the EF 50mm f/1.2 is probably not the first lens in your kit that you need to urgently and upgrade.
Starting with the similarities between the two lenses, bokeh, which is the main reason for shooting on this fast lens, is the beauty of both. Both versions are also USM lenses, meaning they both focus by thread. Although it’s not ideal, it’s at least consistent, one less thing to learn if and when you change.
The RF 50mm f/1.2, in my experience, has a few advantages over the eye. Corner bokeh fringing and chromatic aberration, which is seen in the EF version, is minimal. The RF version is also slightly faster wide open, but not by much, and is still slightly sharper than the slightly slower EF Sigma 50mm f/1.4.
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In short, there are differences if you look for them, but they are not immediately noticeable between the 24-70 or 70-200 RF and EF versions. If I were a photographer with an RF body and three EF lenses in my bag, the 50mm f/1.2 would be my last upgrade.
You can try the Canon EF 50mm f/1.2L for yourself at LensRental here or the Canon RF 50mm f/1.2L here.
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