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Thunderbolt 4 Dock

Thunderbolt 4 hub and ports!

Any Mac with Thunderbolt 3.


Leica S2 new examples and autofocus accuracy in the field

Just published are half a dozen new examples with the Leica S2 (in no particular order on the existing page).

I’ve also published a new page assessing autofocus in the field with the Leica S2. Even if you have no interest in the Leica S2, I advise reading this page, because no camera system is immune from focus error. I think it is quite instructive, no matter what brand you shoot. The Leica S lenses are so outstanding that no errors can be tolerated. Also, most of the S lenses are diffraction- limited by f/5.6, so stopping down to overcome focus error is very unappealing (diffraction limited is the highest praise one can give to lens sharpness).

As discussed in depth and breadth in Making Sharp Images, sharpness requires cooperation from all parts of the imaging system; optical advantages vaporize without pinpoint focus.

Some of the Leica S2 sunset shots remind me strongly of 4X5 film, especially with the noise that occurs when ISO 320 is used, or the exposure is pushed.

Sunset towards Mt Dana (Yosemite)
Leica S2 + 35mm f/2.5 Summarit-S ASPH @ f/2.8
Last kiss of light on rock outcrop (Yosemite)
Leica S2 + 120mm f/2.5 APO-Macro-Summarit-S @ f/5.6
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