Low light lens, what's the point?

[djacobox372]

There is no such thing as a modern DSLR that takes "soft" images, they all take razor sharp images.

Sorry but that is just not true, and the main reason is the low-pass (anti-aliasing) filter in front of most image sensors.

Any amount of low-pass filtering is going to soften an image. The amount of low-pass filtering varies.

Of course there are slight variations, but I've still yet to see a DSLR made in the last 5 years that isn't capable of taking razor sharp images, some are sharper with the default settings then others, but it's a mistake to blame the camera body for image sharpness at reasonable isos/enlargements.

 

[Garbz]

Sorry but that is just not true, and the main reason is the low-pass (anti-aliasing) filter in front of most image sensors.

Also don't forget the Beyer filter pattern. That has a massive impact too. Interpolating becomes a tradeoff between sharpness and accurate colour reproduction.

 

[KmH]

I didn't want to get anymore involved than necessary, so left out what Thom Hogan terms "Dirty Secrets" - "alteration of raw files, manipulating gain factors, non-linear and error-prone ADCs, mismatching greens in Bayer filtration, and a host of other little things that some of us have known about for quite some time but which generally don't get much press."