I find my eye drawn to the smallest image. Probably something to do with initial assimilation of information and how much we can process to begin with.
I suppose ideally you would either post two images (one larger than the other) or be able to increase the size of the first (smaller) image by clicking on it...
I see your point. What I was trying to achieve was a picture large enough to be comfortably viewed but not so large that the eye was drawn to the internal detail
Yes ... An interesting question indeed
Perhaps unfortunately, it is compounded by the fact that your second and third images appear [on my iPad] to be identical.
Yes, different screen sizes, the distance one is viewing the image from, etc, are all added factors I suppose. There is probably no rule of thumb but I thought I'd explore the idea.
I hope those larvae don't eat all my protists, there are dozens of them in the tank now, so many I have strung mosquito net over it to prevent escape.