LensRentals has loaned me a Hasselblad XCD 135mm f/2.8 lens for testing.
Today I tested for focus curvature, using Roger Cicala’s test method. I found a flat surface with some texture, set the lens to wide open, and got this image:
In order to show the in-focus area, I brought the image into Photoshop, and selected Filter>Stylize>Sharpen Edges. That gave me this:
Excellent.
Here are results at a different focus distance.
Also excellent.
Leave a Reply