One of the things that I immediately noticed when I started using the RF 100-400 was how fast and “sure footed” the AF is on the R6. Focus speed is in my opinion excellent and the Canon lens does seem to be less jittery and more “sticky” than the Sigma lens. I found that the Sigma 100-400 has a lot more tendency to lock onto the subject quickly then drift off than the RF 100-400.
I was really pleased with the R6’s ability to achieve focus with the RF 100-400 in dimly-lit situations. I could often achieve focus on my subjects in light that was so low that I couldn’t get acceptable shutter speeds without going way up the ISO range or even maxing it out.
The RF 100-400, possibly due to its narrow aperture at 400mm, seems to have a lot less of an issue getting “stuck” when the focus is on the background and the subject is close than lenses like my EF 500mm f/4’s. With the 500mm lenses I often have to turn the manual focus ring to bring the focus closer so the AF can catch the subject. With the RF 100-400 I can usually get the focus on the subject in situations like this by simply pumping the AF-on button once or twice, which I find to be much quicker.
Another area where I’m impressed with the new RF 100-400 is with the image stabilization. I’m finding that it is noticeably better than that of the Sigma. I was able to get shots at 400mm and 1/30s without too much trouble where I was really struggling to get usable shots with the Sigma at the same speed.
From my initial outings with the lens I am finding the in the center of the frame the image quality at 400mm and f/8 (wide open) is pretty good and I don’t think I’ll have any problems being happy with the results. Out at the edges and corners of the frame I am seeing some softening of the image which is a little disappointing but really not unexpected, especially considering the price of the lens.
Possibly the thing I love most about the AF on the R6 is the ability to focus pretty much anywhere in the frame which lets me use all of the pixels the camera offers instead of having to put the subject towards the center of the frame and then crop for composition afterwards like I usually did with my SLR’s. I’m getting the feeling that with this lens I might need to be careful just how far off-center I can put my subject and still be happy with the resulting sharpness.
One of the things I have noticed about the RF 100-400’s optical rendering is that I sometimes notice a bit of a glow in high contrast transitions from in focus to out of focus areas. If you look at the edges of the petals as they go out of focus you can see what I’m talking about. It’s probably not something that would be a big deal when viewing the whole photo but it wasn’t something I particularly liked. It kind of reminds me of what the old EF 70-300mm DO lens used to do in similar situations.
The bokeh from this lens is in general not one of its strong points in my opinion. It probably has a lot to do with the narrow max aperture so shouldn’t be of much surprise but I do notice a lot more “busy” bokeh than what I’m used to.
Like every piece of photography gear, the RF 100-400 has its compromises. You get a quick-focusing, sharp lens in a compact and light-weight package at a budget price. You give up some edge & corner sharpness, great bokeh and a fast aperture in exchange. I’m finding this lens to be a good set of compromises for me. It’s basically looking like a great lens that I never knew I wanted until I tried it. I’ll definitely be bringing this one along with me on future trips.
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From the manufacturer
Perfect for wildlife, sports, travel and more, the RF100-400mm F5.6-8 IS USM is a compact, lightweight telephoto lens for EOS R Series cameras, offering a versatile zoom range that brings subjects closer with ease. The RF100-400mm F5.6-8 IS USM is similar in size to the EF 70-300mm F4.5-5.6 IS II USM lens, and not only reaches to 400mm, but also has fast Nano USM focusing and up to 6 stops of Coordinated IS when used in combination with an EOS R series camera featuring In-body Image Stabilization, like the EOS R5 and EOS R6, or 5.5 stops with an EOS R/RP camera. Using a single Ultra Low Dispersion lens element towards the front of the lens group corrects chromatic aberration throughout the entire zoom range, making your images look crisp and colorful with minimal color blur. The RF100-400mm F5.6-8 IS USM lens can also accept both the RF1.4x and RF2x tele extenders giving you the effective maximum focal length of 560mm and 800mm respectively.
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Compact, lightweight and high-image quality RF tele zoom lens, with a versatile zoom range of 100-400mm.Compact, lightweight and high-image quality RF tele zoom lens, with a versatile zoom range of 100-400mm. The travel-friendly size and weight (similar in size to the EF 70-300ｍｍ F4.5-5.6 IS II USM lens but a bit lighter) of this lens makes it easier for it to be attached with a camera around your neck while walking around for an extended time and also allows room for more lenses in a camera backpack. |
Optical Image Stabilizer with up to 5.5 Stops* of shake correction.Optical Image Stabilizer with up to 5.5 Stops* of shake correction. Because RF lenses are designed specifically for the RF Mount found on EOS R series cameras, the lens and camera combine to share Image Stabilization data, helping to dramatically reduce the effect of camera shake that can occur when working handheld. This applies when capturing both stills and video with up to 5 stops of stabilization* for accurate and clear content. |
Up to 6 stops of shake correction** when paired with EOS R series cameras featuring In-Body Image Stabilizer (IBIS).Up to 6 stops of shake correction** when paired with EOS R series cameras featuring In-Body Image Stabilizer (IBIS). This IS enabled lens can provide even more steadiness when shooting, up to 6 stops of coordinated IS, if paired with an EOS R Series camera featuring In-Body Image Stabilization, such as the EOS R5 and EOS R6, to further help you capture impressively clear results with slower shutter speeds. |
Minimum focusing distance of 2.89 feet at 200mm and maximum magnification of 0.41x at 400mm.Minimum focusing distance of 2.89 feet at 200mm and maximum magnification of 0.41x at 400mm. With a minimum focusing distance of 2.89 feet at 200mm, the RF100-400mm F5.6-8 IS USM lens is capable of capturing sharp and detailed images from various distances. Especially noteworthy is the lens’s close-up capabilities at the 400mm zoom setting — at its minimum focus distance, at 400mm, you can fill the frame with a subject about the size of a credit card providing outstanding versatility and strikingly sharp images. |
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High speed, smooth and quiet autofocus with Canon’s Nano USM.High speed, smooth and quiet autofocus with Canon’s Nano USM. With any Canon EOS R-series camera, expect swift and positive autofocus. The Nano USM focus system is especially advantageous to video users, because of its combination of quiet operation and outstanding smoothness of focus changes during actual recording. |
9-blade circular aperture for beautiful bokeh.9-blade circular aperture for beautiful bokeh. Getting a smooth and natural looking out-of-focus background blur isn’t a problem for this lens as it has a 9-blade circular aperture which separates your subject from the background, while also providing a beautiful backdrop that's visually appealing in itself. |
Control Ring for direct setting changes.Control Ring for direct setting changes. The RF100-400mm F5.6-8 IS USMlens incorporates a Control Ring on the lens barrel that can directly adjust numerous settings including shutter speed, aperture, ISO, exposure compensation and more. Located towards the front of the lens it effectively adds a third dial to EOS R and RP cameras, and a fourth dial to cameras such as EOS R5 and R6 cameras. With a tactile, easily distinguished surface and a clicking mechanism that provides tangible feedback for confident use while looking through the viewfinder, the control ring adds outstanding connection to any shooting scenario. For photographers and movie makers who would prefer a silent control ring, the clicking mechanism can be removed at a Canon Factory Service Center location for a fee. |
Compatible with optional Canon Extenders RF1.4x^ and RF2x^^.Compatible with optional Canon Extenders RF1.4x^ and RF2x^^. To help get you even closer to the subject, attach the compatible optional Canon RF extenders to the RF100-400mm F5.6-8 IS USM and get the equivalent of 560mm focal length coverage with the Extender RF1.4x, or 800mm using the Extender RF2x. In fact, the RF100-400mm F5.6-8 IS USM is the first non-L-series Canon lens with tele extender compatibility, helping transform the lens into an incredibly powerful telephoto combination, with relatively modest additional size and weight. This added flexibility and versatility helps make the RF100-400mm F5.6-8 IS USM an amazing option for nature photography and more. |
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| Customer Rating | (12) | (216) | (91) | (23) |
| Price | $649.99 | $599.00 | $899.00 | $1,399.00 |
| Shipping | FREE Shipping. Details | FREE Shipping. Details | FREE Shipping. Details | FREE Shipping. Details |
| Sold By | Amazon.com | Amazon.com | Amazon.com | Amazon.com |
| Item Dimensions | 3.13 x 3.13 x 6.48 inches | 5.4 x 5.4 x 7.4 inches | 3.2 x 3.2 x 4.8 inches | 3.21 x 3.21 x 5.83 inches |
| Item Weight | 1.80 lbs | 1.52 lbs | 1.90 lbs | 1.00 lbs |
| Lens Type | Telephoto | Telephoto | Mirror Lens | Macro |
| Maximum Aperture | 400 millimeters | 2 millimeters | 6.3 millimeters | 100 millimeters |
| Maximum Focal Length | 400 | 85 | 240 millimeters | 100 |
| Minimum Aperture | 100 | 29 millimeters | 4 | 100 |
| Minimum Focal Length | 100 millimeters | 85 | 24 millimeters | 100 millimeters |
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