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| p.1 #1 · p.1 #1 · Yet Another Tamron 150-600 Thread! Interesting Observations -- |
I finally got my Tamron 150-600 last week -- Thanks Art at Palm Beach Photographic Center --
I spent a couple of days running it through FoCal and shooting various boring objects for familiarization purposes and came up with the following information.
Regardig FoCal -- all testing was done at 600mm
On my 5D2 the microfocus setting came out to a +8. Odd for this body since all my other lenses are within a couple of points of ZERO plus or minus..... I think "maybe the lens is off" -- but then....
.... on my 7D, the MF adustment came out at +2, which is well within reason.... Interesting, I thought.....
I then ran the optimal F-stop test. On both bodies the best F-Stop came out to be F14 with F11 being a close 2nd and F8, a close 3rd. Diffraction-wise, the 7D began falling apart at F16 with the 5D2 holding one more stop to F22. So far, no surprises.....
As an engineer by training, I love and trust data, but as an artist by aspiration/inspiration, I like to subjectively look at stuff as well. Here, things got interesting
This is the 7D comparing the optimal F14 on the left and the sucky F6.3 on the right -- no surprises...
This is the 5D2 with optimal F14 on the left and the supposedly sucky F6.3 on the right -- notice the almost lack of difference?
Here is the 5D2 at 100% to compare apples/apples with the 7d.