![]() If we had a multi aspect ratio sensor, like the LX100, I think it would have lot's of success. We buy very expensive lenses but we do not have the possibility to take the best advantage of these lenses. The difference would be important.īut this requires to remove some parts of the lens. If you use other ratios than 3:2, let's say square for instance, you can take advantage of a larger area with a FF sensor than with aps-c. Then you would handicap the 24mm, for no benefit with the crop lenses.Īgree, choosing the A7riii makes more sense imho.Įven with aps-c lenses, there could be an additional benefit. If limited to one body I would seriously consider the 6500 only. The Riii with 24GM will potentially give spectacular results but there will be a big falloff when you go to the E lenses in crop mode. The A7RIII in crop mode is no worse than the A6500. Using the two E lenses in crop mode on the Riii will give lower IQ than if you used the 6500. Perhaps if I had said "dof etc" you would not be so upset, but whatever.īut I seriously question your choice of equipment for your trip. ![]() My concern was that the OP was asking for more than just checking his math and therefor may not completely appreciate the difference between equivalence and exposure. You are 100% correct and dpr is 100% correct and I knew that when I made my post. I haven't changed your words and it is not out of context. But F1.2 is not equivalent to F1.2 across different formats. Those aperture equivalents are for dof onlyĪs for exposure they say, which is very well expressed:į1.2 = F1.2 Yes, it is. Which changes everything (FL, F stop, etc.). The only way to avoid this (APS-C relevant only) is with a speed booster which is often used on APS-C bodies with FF lens. Basically when you crop half the image as well as the light that made that part of the image is thrown away. Therefore if equivalent Focal Length changes the equivalent F Stop must as well. Nothing you wrote is new or not understood by me, I stand by my post.įstop = FocalLength / DiameterOfIris. ![]() So these are 100% equivalents, and there are no restrictions. Total light is important, exposure per see (without taking into account sensor size) is not important, so this is not part of equivalence. It has nothing to do with the "value" of the lens.Įquivalence means equal value. noise, diffraction, theoretical max resolution.Įxposure is NOT part of equivalence, for a good reason. Yes, as long as you are clear that those aperture equivalents are for dof only If I turn on the crop mode in a7riii (x1.5), am I getting the following equivalent Aperture: So, if I’m using a7riii for the following lenses: I’m using both a7riii and a6500 and planning to bring only a7riii to my upcoming Europe trip in April. I still have confusion of FF - APSC Aperture conversion.
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