Size comparison of FE 4/2470 on A7 vs Olympus 12-40 f2.8 on GX7

Started Feb 6, 2014 | Discussions thread
viking79 Forum Pro • Posts: 14,137
Re: apples and oranges

forpetessake wrote:

viking79 wrote:

I think ease of design has more to do with field of view and entrance pupil size (focal length / f-number). The easiest lens designs I have seen which are very good are large format lenses. They are very simple lenses and don't need very high resolution (since the sensor size, film, is measured in inches).

I think in general smaller sensors are harder to design lenses for, as you have to start getting excellent performance at very large apertures to make them any good.

Very true. If equivalent lenses had the same or lower production cost/spec then smaller sensors were the winners. But the reality is that by increasing the sensor size the production cost/spec for equivalent lenses goes down. I wounder how much would an equivalent 12-35mm f/2 m43 lens cost and weigh, especially if the requirements were at least 80-100 lpmm in the center and 70-90 in the edges to match the Sony lens.

Olympus actually made one for 4/3 SLR cameras, 14-35mm f/2 lens, and it is still available and about $2300 US.

Now, it might or might not be a better lens than the CZ 24-70mm f/4, but it also costs twice as much for comparable entrance pupil size and field of view range.


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