Ryan Mack

Lives in United States Boston, MA, United States
Works as a Photographer and Facebook Photos Engineer
Has a website at facebook.com/r/
Joined on Jan 25, 2002
About me:

I work at Facebook improving photo quality and performance. When I have time I'm a passionate photography enthusiast.


Total: 6, showing: 1 – 6
On article Photo story of the week: I Am Legend (170 comments in total)

If you crop in portrait orientation to the middle third it’s much better.

Link | Posted on Oct 28, 2017 at 15:23 UTC as 94th comment
On article Western Digital launches its first portable SSD (143 comments in total)
In reply to:

Davud: Add a SD reader and backup next

NEXTO makes a batter powered SSD backup device that doesn't require a computer.

Link | Posted on Apr 7, 2017 at 09:50 UTC
On article LensRentals tests the Nikon 70-200mm F2.8 FL ED (111 comments in total)
In reply to:

(unknown member): I wonder what the effective focal length at 200mm and minimum focus distance is, the previous version was really only 135mm.

Well, the maximum reproduction ratio went from 0.12 to 0.21 which is 75% larger, however the minimum focus distance went from 4.6ft to 3.6ft, which would account for the size increasing by 22%. If you do the math ((.21/.12)/(4.6/3.6)) you get that it's about 37% bigger at the same focus distance. So if the old lens was effectively 135mm then the new lens would be 185mm. That happens to be roughly the same as the VR I, which nobody thought had an issue, so I'd consider this fixed.

Link | Posted on Nov 22, 2016 at 13:41 UTC
In reply to:

mantra: hi

i find the new acr 4.7 rc slower then before!

under windows 7 , did you notice the same?

The pre-release versions likely have extra debug code enabled so it will be slower than a full release version.

Link | Posted on Feb 26, 2013 at 12:43 UTC
In reply to:

Richt2000: So, as repeated when the 'e' was announced, for landcape shooters, Its not a few hundred £/$ more, its a few thousand as Tilt-Shift Lenses are a MUST to make the 'e' version worth-while for landscapers...

If you need a wide depth of field you either need to use a tilt-shift lens (tilted) or you need to stop down to a very small aperture which would eliminate the sharpness benefit of the 'e'. The alternative is focus stacking which works for some subjects.

Link | Posted on Jun 12, 2012 at 14:59 UTC

If I resize my images to fit within a 1960x1440 box before uploading I get very good image quality on FB.

Link | Posted on Feb 10, 2012 at 22:40 UTC as 60th comment | 1 reply
Total: 6, showing: 1 – 6