@depardeuz - You brought a 15x70 during one my sidewalk sessions? Got meh?
![evil-smile [smilie=evil-smile.gif]](./images/smilies/evil-smile.gif)
Sorry, usually too busy with sidewalk crowd to notice who brought what when.
@mystiq - Other than weight, another factor to consider is what you intend to achieve with it. If it's for sweeping the milky way, large clusters (e.g Hyades, Kemble's cascade) and finding/confirm objects quickly before deciding to deploy a telescope, than a wider FOV in 7/8/10x50 is more important than the narrower FOV of 15x70 and bigger binoculars.
Just like telescopes, there is no perfect bino. So you have to compromise somewhere. And just like telescopes, if you are really into bino astro, you will end getting at least 2 anyway - one for wide FOV sweep, one for higher powered views. Both have their pros and cons depending on the objects you are looking at. E.g. Like what depardeuz mentioned, Pleiades is a sight to behold in a 15x70 (M31 too). More stars + darker sky background than a 7x50.
Framing Hyades cluster, Kemble's Casade, M8 + M20 and M36+ M38 in same fov (with Milky Way in the background!) in the wider 7x/8x/10x bino is amazing too - something a 15x70 can't squeeze them in.
When testing/buying bino during the daytime, it is very hard to really test its performance which only a proper star test at night can achieve - especially when testing exit pupil performance. So I recommend you do most of the testing by trying out binos from other members at night rather than at shops during daytime.
Highly recommend bino newcomers to borrow and read this book from the library *before* buying a bino:
"Stargazing with Binoculars"
http://catalogue.nlb.gov.sg/cgi-bin/spy ... /5889943,1
Read some of the preview pages from its Amazon listing:
http://www.amazon.com/Stargazing-Binocu ... B0085SID8A