Both lenses adopt the classic double Gaussian structure, and the imaging quality is excellent. Jiao Wai is better, at 50 1.4, and there is not much difference in Jiao Wai except that the aperture is 1.4. The plastic feeling of 50 1.8 is too heavy, and there is no handle at all, which is the biggest difference from 50 1.4. Secondly, it focuses in the dark at 50 1.8, and it is difficult to focus accurately at the aperture of 1.8 with a three-digit body.

Because the focusing stroke of 50 1.4 is much longer than that of 1.8, the focusing accuracy is much higher. As for the end of 85 1.8, it seems to be too long on the fuselage of APS, and its practicability is reduced. Under the same aperture; The image sharpness and color reproduction of 50 1.4 are definitely better than 50 1.8. The aperture of 50 1.4 is one step larger, and it is definitely more practical under some poor light conditions.

As for 85 1.8, the focal length is different, so I can only say that it is difficult to compare your situation. The choice of 50 1.4 and 85 1.8 is basically the difference of focal length.

Extended data:

Differences between Canon 50 1.8 and 50 1.4 in imaging.

1, 50 1.4 all have USM, which is incomparable to full-time manual focusing. However, if the spittoon is out of focus, it can be adjusted to MF file for fine adjustment.

2, the value preservation, the value preservation of 50 1.4 is very good, and the second-hand price will not be much cheaper.

3. Imaging problem: 50 1.4 is better than 50 1.8 defocusing imaging.

4. The advantage of 50 1.4 is more obvious in low light, and the aperture is large, which can improve the shutter speed when shooting and blur the background better.