Hi everyone

,
i was looking through the Aldi shop catalogue when i noticed these zoom binoculars for $25.
There are two types the 10-30x60 or 8-24x50 magnification bino's.they say that they have:
Blue coloured multi-coated lenses
Double sided multiple coating treatment
Reversible eyecup
Reflection treated
i already have a 10x50 bino but i would like the convenience of being able to zoom on a deep sky object.
i understand that the fov will be small at higher power and therefore very wobbly and the binos weigh a bit so is there some kind of tripod i can put them on.
just wondering what you guys think and if theres anyone out there which owns zoom binos that can give me there opinion on them.
orestis

ps what is the purpose of the blue coloured coating?
thanks in advance.