从上到下依次是800，400，200mm的构型，可以看出中间部分的镜片并没有大幅前移，佳能确实做了一点平衡考...
而现在的真实情况是佳能RF 200-800光圈更小，实际拍摄时快门也更慢，高感慢速肯定对画质造成劣化，而且...
Canon EOS R5, Canon RF 100-500mm L IS USM at 100mm wide-open at f/4.5 hand-held at 1/320 at ISO 50, -0.3 stops exposure compensation (LV 13¾), exaclty as shot. bigger or camera-original © JPG file.At 200mmScarecrow Owl, 10:13 AM, 03 September 2020. Canon EOS R5, ...
RF-S 10-18mm F4.5-6.3 IS STM and RF 200-800mm F6.3-9 IS USM. Plus, they have also added two new power zoom adapters (PZ-E2 and PZ-E2B) that can be used with the RF 24-105mm F2.8L IS USM Z.
I have most of the lenses compatible with the TC and will be getting the RF 100-500 in a few months, once I've paid off the RF 200-800, which is being delivered soon. I've tried to Google it but I'm drawing a blank on the answer. ...
Most optics are not exactly what they say, but 707/10 and 800/11 should nominally both be 70.7mm. That's the same as a 200/2.8 and 400/5.6, too. With a very sharp lens, 200/2.8 can capture the same image as 800/11, if the 200/2.8 has 16x the pixel density. So, ability to...
Canon review website with every Canon EF Lens and all RF lenses, so you can read the all of the reviews, see the specification and check the price, all from one page.
Review ReportsVersions Notes Abstract : RF energy harvesting converts ambient signals into electrical power, providing a sustainable energy source. This study demonstrates the use of a piezoelectric transformer for efficient RF energy harvesting. In this work, a piezoelectric transformer (PT) is employed...
In-Depth Review The Canon RF 70-200mm F4 L IS USM Lens ranks near the top of my most anticipated of all lenses ever produced. This focal length range in the f/4 max aperture is one of my most frequently used lenses, and it seems that all photographers can make frequent use of at...
As an "RF" lens, the Canon RF 2x extender is compatible with all Canon RF-mount cameras, the R-Series models as of review time. Only specified RF lenses are compatible, with notably the Canon RF 70-200mm F2.8 L IS USM Lens missing from the list. This lens was designed for ultimate...