Wed Sep 5 19:42:30 EDT 2012 Peter McIntosh wrote: > On 6 September 2012 08:18, Igor Roshchin <str at komkon.org> wrote: > > > > > > Finally, Samsung EX2F appeared at B&H. > > It's a P&S camera with a fast (f/1.4-2.7) zoom. > > http://www.bhphotovideo.com/bnh/controller/home?O=&sku=877078&Q=&is=REG&A=ShowProduct > > > > What puzzles me a bit is the footnote next to the max aperture under > > "specifications" tab: > > "Please Note: Built-in ND filter". > > I know what a neutral density filter does. But I wonder if it is > > permanently build in (to cope with the huge amount of light, while > > allowing the shallower DOF), or it moves in under certain condition. > > The latter sounds like a big mechanical complication to me, while the > > former defeats one of the purposes of having a fast lens. > > > > Any thoughts? > > > > I have a little Olympus XZ-1 as my pocket camera, and it also has a > built-in ND filter. It's not a mechanical filter - simply a firmware > feature that mimics a ND filter's behaviour. It is menu-controlled. > Works well in the Olympus too. > > Hope this helps. > > Ciao, > > Pete Mac in Melbourne
Pete, that indeed helps, thank you! It also brought up some additional questions: 1) How is it implemented (i.e. do you just set it as "on" and "off", or is it more complicated, e.g. conditional on the high/low light levels?) 2) I wonder how it is actually implemented. I guess, one way to do that is to decrease the gain on the sensor elements. Igor -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
