It’s the glass that counts.


It’s the glass that counts  - a personal view.

by Tim Hancock, Chairman.

Camera manufacturers have long marketed their latest digital cameras with emphasis on the number of Megapixels, and its hard not to be convinced that 30 megapixels is not better than 20.


It probably is.


But is it really the most important thing to concentrate on? Along with the number of megapixels,  we also get lured into the sensor size temptation. Isn’t full frame (FF) better than APS-C which is turn is better than micro four thirds (M43) ?


It probably is.


But full frame requires huge and heavy lenses to capture all that light. Is it worth it the extra cost?


Smaller cameras such as M43 have smaller lenses.  A 35 - 100 f2.8 lens for M43 is a lot smaller than the equivalent 70 - 200 f2.8 lens for full frame so that must be a big benefit for the smaller sensor cameras?


But hang on a minute. An f2.8 lens on M43 is equivalent to f5.6 on full frame, so the comparison above isn’t valid. The full frame lens is pulling in loads more light. And what’s more, if you check out the truly equivalent full frame lens, namely f5.6 70-200 guess what - it’s about the same size as the M43 lens, and maybe cheaper too.

It’s easy to be taken in by the marketing spiel, whether pixels, sensor size or weight, but you can’t undo the laws of physics, just package them up differently.


And whatever camera you have, don’t forget the glass and know exactly what you’re buying.

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