BillN
Hall of Famer
- Location
- S W France
- Name
- Bill
a lot of these super compacts now not only have an optical zoom, but they also "boast" a digital zoom
so is it logical to say that when you have a FF DSLR with a bigger sensor plus more mega pixels and you use say a 50mm lens and then crop it down, that is equivalent to what may be called a "digital zoom" image
what I am after is info on digital zooms versus optical zooms and their comparison
the concept being - i.e. which will have the best IQ - a Nikon D700 with a 50mm, 100mm or 200mm lens cropped down to the same size as a super compact producing an image at the 35mm equivalent of 500mm or whatever - someone needs to do the maths for me, i.e. sensor size, pixels and crop factor
what I am asking is "is a DSLR cropped image a digital zoom image and are their any comparisons anywhere between cropped images from a DSLR versus "optical" zoom images from a super compact ........... if you get my drift ........ is a (cropped) digital zoom image from a DSLR better IQ wise that an optical zoom image from a good compact, (say the XS-1) - and were does the IQ cross over?
am I talking a load of rubbish or can someone enlighten me
another realted thought, to confuse, is - all you will need one day is say, a D800 plus a 100 mm lens - then crop it down and you will have an image better than any 500mm super zoom compact ....... and once you stick a 200mm prime on the end ...... and crop - no need for all these long VR lens - (accepting that most never fill the frame)
so is it logical to say that when you have a FF DSLR with a bigger sensor plus more mega pixels and you use say a 50mm lens and then crop it down, that is equivalent to what may be called a "digital zoom" image
what I am after is info on digital zooms versus optical zooms and their comparison
the concept being - i.e. which will have the best IQ - a Nikon D700 with a 50mm, 100mm or 200mm lens cropped down to the same size as a super compact producing an image at the 35mm equivalent of 500mm or whatever - someone needs to do the maths for me, i.e. sensor size, pixels and crop factor
what I am asking is "is a DSLR cropped image a digital zoom image and are their any comparisons anywhere between cropped images from a DSLR versus "optical" zoom images from a super compact ........... if you get my drift ........ is a (cropped) digital zoom image from a DSLR better IQ wise that an optical zoom image from a good compact, (say the XS-1) - and were does the IQ cross over?
am I talking a load of rubbish or can someone enlighten me
another realted thought, to confuse, is - all you will need one day is say, a D800 plus a 100 mm lens - then crop it down and you will have an image better than any 500mm super zoom compact ....... and once you stick a 200mm prime on the end ...... and crop - no need for all these long VR lens - (accepting that most never fill the frame)