Any Advantage to Full Frame?

Started Aug 26, 2014 | Questions thread
Ronan_M
Ronan_M Senior Member • Posts: 1,364
Re: Turning up the heat

Leonard Shepherd wrote:

The OP shoots in a way that makes FX unsuitable for his/her photography.

The suggestion 24 MP FX somehow has more resolution than 24 MP is largely a myth. Comparing medium format to 24x36 film there were more film grains on medium format which made greater reproductions often a reality. Sensor quality is now so good that there is no resolution difference at 100 ISO 24 MP DX and FX, and once the D7100 is upgraded to Expeed 4 there is unlikely to be a difference to 1600 ISO. Larger FX pixels can work better than smaller DX pixels at higher ISOs - but the OP does not shoot that way.

Putting pixel size into context the D800 and D7100 pixels are roughly similar size. The D800 has more resolution than the D7100 because it is 36 MP. Put another way MP generally plays a more important part in resolution than pixel size.

Because of different viewfinder magnification factors the decent DX viewfinders are 1 stop brighter than FX viewfinders which helps in low light or with f5.6 lenses. The FX viewfinder image detail is larger, but only by about 15%, again because of the different viewfinder factors. Which you prefer is up to you.

"1 stop ISO noise gain" for FX is sometimes misunderstood as the difference between 1 full ISO setting change at high ISO's is often no more than 0.75 stops dynamic range. If the debate is between 10.75 FX and 10 stops DR DX and the subject has 8 stops DR the debate is academic.

My belief is for about 15% of photography FX is better and for about 15% DX is better, and the other 70% of the time it makes little difference. If you shoot a lot of the 15% which is better with 1 format or the other than that format is best for you

If you shoot both 15% segments then owning both format bodies (as I do) makes a lot of sense.

If you cannot get a very good 24x20 inch print from 24 MP DX or FX to 1600 ISO; maybe you should concentrate more on improving your photographic skill rather than considering when DX is better than FX (as it can be) and when FX is better than DX (as it can be).

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Leonard Shepherd
Producing good quality photographs, or being good at sport or art, involves a little more than buying appropriate equipment. Practice, some learning and perhaps natural talent often play a bigger role than the equipment in your hands.

Case Closed!

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