Celestron Skymaster Pro 15X70 versus Celestron Skymaster Giant 15x70

[mjspad]

Hi, I was wondering what the main differences are between these too and why the Pro is significantly more expensive than the Giant. I can see that the Giant is ironically smaller and lighter than the other one, it is also water resistant and not waterprook like the pro. This is my first time buying binoculars.

I want to use them for sky watching and earth things (animals, landscapes, etc). we want to be able to get an adapter for the smartphone to take photos. 

 

Thanks in advance!

[Clarkey]

I was looking at the Skymaster Pro's as an option. My guess the main difference is that the Pro's are purged and completely sealed so less risk of cloudy optics etc.