Hello from Austria!
I bought a Sigma 105mm f1.4 A and would like to hear your opinion on the imaging performance. I could still give the lens back.
I did tests with a Canon 6Da and a Canon 77Da. The focus was always on a star in the center of the picture (with Bahtinov Mask).
6Da - JPEG - f1.4 - ISO 200 - 25 seconds
77Da - JPEG - f1.4 - ISO 200 - 25 seconds
You can find uncompressed TIFs here:
The vignette has been removed from the test images in Camera Raw. Otherwise they are not processed.
With the 77Da it is noticeable that the stars in the center of the image are not as sharp as those at the edges. What could be causing this?
Should I keep the lens or would you return it?