|
A lot of compact camera manufacturers quote digital zoom and optical zoom together as the overall 'zoom range'. Digital zoom figures should be completely ignored - it is false marketing to call it a zoom because all the camera does is crop the image, ie showing you it at a larger size. Obviously this decreases image quality just like if you magnified an image on your computer.
The optical quality you will achieve from your 18-250mm Pentax lens will be superior to this and you can, if you desire, crop the images yourself later on. If I were you I would experiment further before buying another lens - if you can get well focussed, sharp images with your current combination (I would probably require a monopod or tripod to do this even at 250mm, but it depends how steady your hands are) you should, when you load them to your computer, be able to see the difference in quality. Make sure you turn on 'anti-shake' and use shutter priority (Tv) mode to set a fast shutter speed and freeze the action.
Good Luck!
__________________
K10D
|