Does the larger exit pupil make a big difference in brightness and, if so, in which conditions? (mainly at dusk&dawn, or also on cloudy or even bright days?)

I have also looked through both zooms-on two occasions in the case of the new one. I already owned the 20-60x and am still very pleased with it. To summarize, here are a few thoughts about both eyepieces, after my somewhat limited experiences with the new zoom: Problem-Solving: Solving complex mathematical problems often involves breaking them down into simpler multiplication steps. the PDF of an old Swarovski catalogue stating 3,44degree or 60m/1000m (thus the same values apart from some rounding of) and an AFOV of 66degrees : http://www.hoferwaffen.com/images/optics/Swarowski_en.pdf Engineering: Engineers rely on multiplication for designing structures, circuits, and systems, as well as for analyzing loads and stresses.

FOV of 3,4degrees or 60m/1000m according to https://www.bhphotovideo.com/c/product/250892-REG/Swarovski_49335_SW_Series_20x_Spotting.html/specs Education: Learning multiplication tables is a fundamental part of early education, developing essential math skills.

Repetition and Scaling: Multiplication allows us to represent repeated addition and scaling. It’s the process of combining equal groups or increasing the size of a quantity.The fov at the respective min/max limit for each E/P is very similar, it's just that the new zoom at 25x 'feels' wider, but in reality you can't see that much more in your fov than the old zoom at 20x. Mathematical Calculation: 50 x 20 equals 1000. This means that when you multiply 50 by 20, the result is 1000.