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Any telephoto zoom 4/3 Lenses for E-M1 that are much better than similar m4/3?

Started Mar 9, 2014 | Discussions thread
Anders W
Anders W Forum Pro • Posts: 22,144
Try to read and understand what I said before objecting to it
1

DonSC wrote:

You say physics but you're simply wrong in your interpretation of the physics. First you keep saying the image degrades by 70%. We're talking about a 1.4TC. Even a 2X TC would only degrade the lens image by 50%! Where does the 70% come from?

I never said that the TC degrades the image by 70 percent. What I said is that the TC takes lens resolution down to about 70 percent of what it originally was. The reason is that 1 divided by 1.4 is approximately 0.7.

http://www.dpreview.com/forums/post/53277308

Secondly, you're missing the most important bit, which is that image quality is based on both the lens image and the sensor. Since the best lenses outresolve the best sensors, degrading the lens image always results in far less degradation of the image. For high quality lenses and TCs the degradation is along the lines of what is observed, which is 10% to 20%, depending on the lens and the TC.

I already told you that nine hours ago. See here

http://www.dpreview.com/forums/post/53285302

and here

http://www.dpreview.com/forums/post/53285479

See also here:

http://www.dpreview.com/forums/post/53285561

Not to put too fine a point on it, but photographers have been measuring how TCs degrade image quality for decades. "Physics" aside, the first rule of science is "what is, is possible". In this case, "what is" is that a TC will NOT degrade an image by 70% unless you have a really bad lens and a really bad TC.

Try to read and understand what I have said before objecting to it.

 Anders W's gear list:Anders W's gear list
Panasonic Lumix DMC-G1 Olympus PEN-F Olympus E-M1 II Panasonic Lumix G Vario 14-45mm F3.5-5.6 ASPH OIS Panasonic Lumix G Vario 7-14mm F4 ASPH +20 more
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