Crop Factor, Low Light and Aperture with m4/3 lenses? Part 2

Started Jun 16, 2014 | Discussions thread
Anders W Forum Pro • Posts: 21,468
Re: Crop Factor, Low Light and Aperture with m4/3 lenses? Part 2

Just another Canon shooter wrote:

Anders W wrote:

And I do not have to. I just said that it does.

That's my point. Your claim is an uninteresting triviality.

Glad that you are finally getting it. It is trivial, indeed.

Get over it, it is a fact of life.

There's nothing here for me to get over. I am already above.

Show me an m43 system that can match the Phase One. Feel free to link to an image of a 100mp sensor.

As we all know, there is no MFT body with more than 16 MP. However there are FF cameras with 16 MP or thereabout. This puts is in a position to distinguish the effect of the pixel count from the effect of the sensor size.

Only when you handicap the higher resolution system (and compare at slow apertures).

You missed the point. The point is that if we isolate the impact of pixel count from the impact of sensor size, the latter doesn't turn out to matter much.

And if you put the cap on, sensor size does not matter. At such low sensor mp counts, with such well stopped down lenses (because your 25/1.7 is 50/3.4 eq., and resolution above that point is no concern for most FF shooters anyway), the difference is small. Yes, like driving a Porsche in a heavy traffic, the Prius will be next to it all the time.

Precisely. Why drive a Porsche if the Prius will get the job done better?

What a surprise - limit severely the resolution of the sensor, by today's standard, and the advantage is mostly gone.

Right. Because the advantage has little to do with the sensor size.

Wrong logic. It actually follows from the formula you cited above, if you know how to analyze it.

No it doesn't. The formula shows that image resolution depends on pixel count, not sensor size.

BTW, if you do the comparison right, you see that the pricey 25/0.95, equivalent to 50/1.8 does 530 lph. The much cheaper and lighter Canon 50/1.4, does 745 lph (rough interpolation between f/1.4 and f/2). This is 40% more resolution, when you need it the most!

I am personally not interested in using such apertures since the DoF is usually insufficient for my needs. If I were interested, I would shoot FF rather than MFT.

You should try it some day.

No need to do that. I have already tried it. I shot FF (film SLRs) for 35 years.

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