Hansel300

/// "ISO and its role in clarifying and confusing
This means that, a Four Thirds camera with a 50mm f/2 lens at ISO100 should produce a JPEG of the same brightness as a Full frame camera with a...

The problem here is that the rear 1/4 of the external barrel of sigma lens have remained the same for some time. Back in the day, sigma made that final 1/4 of the ext barrel narrower for nikon and...

Ya got old film photographers saying they can make the same size prints with apsc that they made with medium format film.
Micro 4/3's is the new 35mm
apsc is the new medium format
FF is the new...

Pentax might in future just leave a little notch in. I got one of those lenses on the list so I'll be getting Sigma to fix it.
I don't know where you get "canon or nikon, they have better lenses"....

I think its a bit silly to criticize Pentax for not having obscure big dollar lenses which canon and nikon sell only a couple of hundred of per year. Pentax isl creating a new FF lens lineup, the...

Whats with all the apsc hate? Ever heard of the D500 and 7Dmark ii and Fujifilm.
There's nothing wrong with APSC, stop complaining. Its a format in its own right. Full frame is not the be all and...

Conventional UV IR cut filter combined AA filter on the sensor blocks out UV IR from 390nm then stops IR at 700nm leaving the visible spectrum for camera to capture. 810A lets in visible red lower...