Hi Marc,
Thanks for chiming in! And thanks for digging into the pictures.
Just two small remarks:
1) The image shot with the Master Cam HS is only shifted, not stitched
2) I feel that the Canon 16-35/4 has optimum aperture around f/8. With my sample of the 24/3.5 TSE LII I feel that I need to stop down a bit more for best sharpness, especially when shifted. Both lenses are essentially brand new. I was considering to send in the 24/3.5 TS for repair, but I would guess that it is "within tolerances" so I didn't care.
I have noticed loss in sharpness
and colour fringing on the rooster on top. I have taken some liberties with the image circle on the 16-35/4.
What I may have found is that I was most happy with the vertical stitch on the TSE and with the shifted 16-35/4.
Just to explain, the idea with this posting is mostly to give some "food for thought" on software corrections vs. shift and also stitching.
Best regards
Erik
Hi Erik,
thanks for that interesting comparison. A few things that I noticed:
- You cold get away with all these images for most purposes.
- As expected for all methods the top of the tower is the weakest spot.
- Resolution and detail of the TS-E with one shot level and one shifted vertical (File 4473) has a lot of detail and resolution. To me it looks as if the tower could possibly be a bit sharper if focused a bit more distant (field curvature).
- The keystone corrected example (File 4462) is taken at f8, the others at f11. That could disadvantage it a bit. But even at f11 I doubt that it could match the clarity of detail in the foreground (grass) of the other examples, especially ot File 4473. By tilting the camera you tilt the plane of focus which puts foreground further away from the plane of focus. To me this image has the weekest image quality of the four.
- The stitched 16-35 with the HCam Master TS looks very good in most part of the tower. I see a sudden drop of sharpness when it comes to the rooster on top (File 4465).
- The lack of detail in the far corners makes it difficult to guess how image quality would be in the outer regions of the image circle.
Very interesting stuff.
Regards - Marc