IBIS test on Sony A6500 and Tamron 70-180/2.8

Started 3 months ago | Discussions thread
OP voronspb Senior Member • Posts: 1,893
Re: IBIS test on Sony A6500 and Tamron 70-180/2.8

Euell wrote:

If that proposition is accurate, then the minimum hand-held shutter speed for a 180mm lens on the A6500 is not 1/180th of a second, but rather 1/270th of a second. And, it would seem there are implications for image stabilization as well.

Sure thing, the 1/F rule for APS-С would be 1/270 s.

But! The 1/F rule is very old, it was invented in time period, when everyone shot film. And there you had not 24 or 50 or 61 MP, but closer to 5 MP, and you didn't examine each photo under a loupe, but printed it and watched as a whole.

In the present the situation has changed, and 1/F rule is very optimistic. Now, if you want a razor-sharp photo at 100%, you must either utilize a MUCH faster shutter, like 1/2F to 1/4F, or use stabilization.

And actually, while examining a photo under 100% mag, the 24 MP cropped sensor would require exactly the same "safe" shutter speed as 54 MP FF sensor. Because their pixels are the same.

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Vladimir Gorbunov
«Often the difference between a good and a bad sample of the same lens is bigger than that between two different lenses» — Bastian K.

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Sony a6500 Sony a7 III Sony FE 55mm F1.8 Tamron 17-28mm F2.8 Di III RXD Tamron 70-180mm F2.8 Di III VXD +8 more
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