Reply to thread

Message

<blockquote data-quote="Bengt Nyman" data-source="post: 476337" data-attributes="member: 13692">Thank you aroy, that's correct.Here are some practical examples where the crop factor may or may not offer an advantage, in case of the lack of a corresponding native lens:The Nikon 1 uses a sensor with 18 MP and offers a crop factor of 2.7. If you were to crop a 36MP image from an FX camera to the same enlargement you would end up with a 5 MP image. The Olympus OMD uses a MFT sensor with 16 MP and offers a crop factor of 2.0. If you were to crop a 36MP image from an FX camera to the same enlargement you would end up with a 9 MP image.The Nikon D7200 uses a DX sensor with 24 MP and offers a crop factor of 1.5. If you crop a 36 MP image from an FX camera to the same enlargement you are left with a 16 MP image.Assuming that the pixel IQ difference between the FX and the DX sensors is less than 30%, putting the Nikon FX 300mm lens on a D7200 would produce 450mm reach and most likely an image quality superior to cropping an FX image down to the same enlargement retaining only 16 MP. This combo might even tolerate a TC14 reaching 630mm before the IQ would degrade below a cropped 36 MP FX camera image.</blockquote>

[QUOTE="Bengt Nyman, post: 476337, member: 13692"] Thank you aroy, that's correct. Here are some practical examples where the crop factor may or may not offer an advantage, in case of the lack of a corresponding native lens: The Nikon 1 uses a sensor with 18 MP and offers a crop factor of 2.7. If you were to crop a 36MP image from an FX camera to the same enlargement you would end up with a 5 MP image. The Olympus OMD uses a MFT sensor with 16 MP and offers a crop factor of 2.0. If you were to crop a 36MP image from an FX camera to the same enlargement you would end up with a 9 MP image. The Nikon D7200 uses a DX sensor with 24 MP and offers a crop factor of 1.5. If you crop a 36 MP image from an FX camera to the same enlargement you are left with a 16 MP image. Assuming that the pixel IQ difference between the FX and the DX sensors is less than 30%, putting the Nikon FX 300mm lens on a D7200 would produce 450mm reach and most likely an image quality superior to cropping an FX image down to the same enlargement retaining only 16 MP. This combo might even tolerate a TC14 reaching 630mm before the IQ would degrade below a cropped 36 MP FX camera image. [/QUOTE]

Verification