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Diffraction blur with the R5 and four prime lenses

Started 7 months ago | Discussions thread
theninth
OP theninth Regular Member • Posts: 323
Re: Diffraction blur with the R5 and four prime lenses

Karl_Guttag wrote:

Additionally, these were from the center of the image, which benefits the least from stopping down. I would expect that corners would peak at a somewhat higher f-number.

I have also done a series of the corners, see below. Images are not taken from the extreme corners but roughly at 2/3 of the line between the center and the corner. By and large it seems to me that the aperture of highest sharpness remains the same as in the center, the RF glass is already very sharp at F2.8, while the older EF glass peaks at F5.6 to F8.0. The biggest difference is seen wide open, where the quality of the EF 35 F1.4L (I) is noticeable worse than in its center and the EF 135 F2.0L also shows some falloff, albeit to a lesser extend. Compared to that, the newer RF glass already wide open delivers very good results in the corners.

Here are the images:

And here the overview of the complete test scene:

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 theninth's gear list:theninth's gear list
Fujifilm X100T Canon EOS R5 Canon EF 35mm F1.4L USM Canon EF 135mm F2L USM Canon RF 50mm F1.2L USM +2 more
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