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Message: <blockquote data-quote="paddy7" data-source="post: 3557092" data-attributes="member: 88594">Indeed this seems to be the case, and a natural consequence of ageing. I'm not sure how much above 4mm i am myself. The only counter to this is that having a larger exit pupil is more tolerant of where the eye is placed. A 4mm exit pupil with a 4mm max dilation doesn't give you much tolerance.Personally, i have no trouble with that, as the method i use to look through bins tends to adapt fairly quickly to what is required. So i reckon i will continue to favour the compactness and light weight of 8x32s, and occasionally wallow in the luxury of something larger.The choice of 42s or 32s is also largely dependent on what sort of birding you do. If you only go out in good daylight on nice days, with max contraction of the pupil, 8x30s may be fine. For those spending evenings staring into the gloom at gull roosts, an extra 20 minutes afforded by 8x42 HTs or similar will be invaluable.I guess that's why so many members here have so many sets of optics apparently!</blockquote>