I have 90D+ 100-400. Is it necessary to add a lens with a magnification of 1.4?

The 90D fuselage is equipped with 100-400 focal length equivalent to 160-640 focal length, which is enough to shoot birds at a long distance!

Personally, 100-400, the first-generation and second-generation aperture should be 4.5-5.6. If a magnifying glass is installed, the aperture will be doubled. Second, the picture quality is so poor that it is completely unnecessary!

If you add it, it will not be AF, and you would rather enlarge the screenshot.

I often take the second-generation lens of Canon 90D+ 100 400 with me now, so I used Canon 70D+ 100 400 because it is light (I don't need a tripod when I go out to shoot small bags). Because it is convenient to travel, I updated my current equipment last June, and of course I tried my best to make more efforts in the composition of photos taken by half a camera. Because noise control is not as good as full-frame machine, ISO should be controlled below 1600 as far as possible to produce good films. This kind of collocation is light and has high freedom!

I have 90D+ 100-400. Is it necessary to add a lens with a magnification of 1.4?

800mm fixed focus, 1.4 times is still acceptable.

600mm fixed focus, just use it twice.

EOS 90D and 100-400mm, it is better to cut it properly.

Hello, let me talk about my views and suggestions:

1. Normal scenery photography, 100-400mm 90D is enough.

It's almost never enough, okay?

Not necessarily. You want to shoot a bigger moon?

Bigger moon, just download one for free online. There is indeed a free high-definition moon on the Internet. There's no need to shoot it yourself, especially if you don't have to spend money.

To tell the truth, shooting the Forbidden City in Beijing, in addition to bringing the immortals closer to the moon, the 70-200mmF2.8 of the Forbidden City in Beijing is basically enough.

To tell the truth, 100-400mm is enough to capture the scenery of China and Tibet, but it is meaningless to enlarge it. It's better to shoot closer.

Second, to tell the truth, 400mm 90D is still not enough for bird shooting.

That's true.

However, the problem is that I really have a fever to shoot birds.

Nevertheless, Quan Huafu's 600mmF4.0 is better equipped with rangefinder.

Quan Huafu's 800mmF5.6 with rangefinder is better.

Your 100-400mm with rangefinder is really not good.

Imaging quality is a problem, so is aperture reduction, and so is focus tracking.

Anyway, all kinds of problems will not make you worry, and will not make you feel refreshed.

Of course, it doesn't mean that you can't add a 1.4 times. It is possible and can be used.

It depends on whether you really need to shoot birds. As long as you have this demand, it is worthwhile to do so.

To sum up, it is not recommended that you buy 1.4 times range extender easily. However, if you really need it, weigh the pros and cons and still think you can have one, then you can really have one.

Basically, if it is the 80-day era, the motivation to buy a 1.4 times rangefinder will be greater. But 90D, with 32 million pixels, has higher requirements for the lens. If the quality of the rangefinder is not as good as that of direct cutting, or the difference between it and direct cutting is not obvious, why buy a rangefinder? What's more, if the aperture 1 is reduced, the focus tracking will also be affected, and the ISO sensitivity will often increase by one step. After comprehensive calculation, it may be better to cut it.

Personally, I think it is unnecessary. Adding a magnifying glass can not improve the resolution of photos, and it is easy to lose focus in practical use.

Practice is the only criterion for testing truth. If I want to shoot birds, 600 experience is necessary. I can shoot birds like Aurora. 400 is too small. I use 90D to match 150-600, sometimes it feels small, for reference only.

The 400mmF5.6 lens of the 32.5 megapixel C 90 SLR is equivalent to a viewing angle of 400X 1.6=640mmF5.6, and the TC 1.4X rangefinder is equivalent to a viewing angle of 640X 1.4=896mmF8, which has AF autofocus performance.

The cropped 1/2 picture is16.25 million pixels, which is equivalent to the viewing angle of 896X 1.5= 1344mmF8, which is suitable for shooting birds at a long distance in a well-lit scene.

Adding a rangefinder and cutting out the picture of 1/2 will lose the focusing performance and image quality, but it is much better than not being able to shoot birds from a distance. You must be able to photograph birds before you can compare the image quality, right?

There are more than 10,000 original lenses for the C 90D fuselage+100-400mm, the equivalent viewing angle of the 600mm Sigma Tianlun zoom lens is about 10,000 yuan, and the original TC 1.4X range extender is two or three thousand yuan. The cost performance of long-distance shooting birds is better than that of adding original TC 1.4X range extender.

Unnecessary, the degradation of image quality is terrible!