Re: Sony pancake 16-50mm vignettes at 16mm.
santiclaws wrote:
viking79 wrote:
I don't understand why people defend Sony with this lens. Every other software corrected lens I use still has an image circle large enough to cover the sensor. They might have equal levels of distortion, but at least they are sharp out to the corners, giving the option to shoot uncorrected or not.
Eric
Because Sony made a design choice. It is not a better or worse choice, it is just a choice - namely, the uncorrected image is not 16mm wide but more like 14- 14.5mm. Presumably this was done in order to attempt to make the corners sharper. There is nothing inherently worse about doing it Sony's way than in any other way with any lens requiring software correction.
You could probably put a m4/3 lens on the Sony and correct away the distortion and get similar results.
I haven't checked all my posts where I posted this, but I would still like to see where someone measures the Sony's focal length. Has anyone actually done this yet? By that I mean photograph something of known size, measure the magnification, and calculate the focal length?
Running the corrections on my samples I took a while back, and it does remove vignetting and CA, but the edges are still pretty soft. Bottom line is marketing one out on that lens, I am sure engineering wouldn't want to put 16-50mm on that lens, probably more like 18-50 or 20-50mm, but that isn't as exciting.
Edit: Focal length is a physical property of the lens, so technically speaking it will always be a 16-50mm lens, but what I am saying is at 16mm it is most certainly not an APS-C image circle lens. It is more like 1.7 or 1.8x crop and probably should have had the range relaxed to support a larger image circle, like made 20-50mm instead if it would have meant better image quality.
Eric