“Given the A7s is a full frame Sony camera, someone really needs to do a lens recommendation list. So many options, but no perfect choices”
One of my main go-to sites for quantitative lens and sensor evaluations, DxOMark, often has a “best lenses for…” article, but not yet for the A7 family (you CAN, however, get a listing of lenses which have been tested with the A7R by going into their Camera Lens Ratings section and setting a filter for the A7R).
And the A7s is a different kettle of fish, isn’t it?
Or is it?
What difference does the 12Mp sensor make in the ORDER in which lenses rank, compared to the 24Mp and 36Mp sensors in the A7 and A7R, respectively? More importantly: what difference in IMAGE quality does the 12Mp sensor allow lenses to make, and given the sensor is the gating factor, does it make sense to spend for the highest performing lens irrespective of sensor?
It’s not clear to me, but I have a sneaking suspicion (though by the way, it's never just about sharpness, is it?).
Especially with DxOMark’s Perceptual Megapixel (P-Mpx) Measurement, for example, what we CAN say is that the combination of the A7R and Sony FE Carl Zeiss Sonnar T* 55mm F1.8ZA yields the highest perceived sharpness of any lens they’ve tested with the A7R thus far, at 29 P-Mpix.
The very similarly performing Carl Zeiss Distagon T* Otus 1.4/55 ZF.2 – which scores an identical 29 P-Mpix on a Nikon D800 and is at the top of that camera’s lens food chain, only scores 21 P-Mpix on a Nikon D5300 and only 12P-Mpix on the older D3.
As we'd expect.
And these measures are ALL at full, still photography resolution — what the heck can we actually squeeze out of these lenses at 1080p?
Anyone out there know?
Can we – should we – extrapolate from full resolution results using the full sensor image in still photography to a down-res’d or down-sampled sensor outputting 1920 x 1080?
We’d like your thoughts.
Given the a7S is a full frame Sony camera, someone really needs to do a lens recommendation list. So many options, but no perfect choices.
— Mike B (@bozfx) July 3, 2014
(cover photo credit: snap from Luminous Landscape)