[Klaus]

[quote name='genotypewriter' timestamp='1298414110' post='6282']

When just looking at Sigma lenses, have you experienced more decentering in zooms over primes or vice versa? And what about other brands?



GTW

[/quote]



If I had to come up with a ranking (best to worst):

1. Olympus FT

2. Nikon

3. Canon

4. Olympus MFT

5. Sony

6. Panasonic

7. Tamron

8. Pentax

9. Sigma

10. Samsung

11. Tokina



This needs to be correlated to the service quality - locally it's roughly:

1. Olympus

2. Nikon

3. Pentax

4. Canon

5. Sigma

6. Tamron

7. Panasonic

8. Sony

9. Tokina

10. Samsung



Prime lenses are, of course, better centered than zooms. We've rarely seen issues with primes actually.

The biggest problem makers are ultra-wide zoom lenses (usually issues at the image sides) and high ratio zoom lenses (center centering -> contrast).