Thats what I needed to know! Well said Sir. Now I need to find one I can "afford"STX is modular
STS isnt
Ive found that my stx is far clearer and brighter than the sts
Thanksif your looking at a light weight spotter
check out the new swaro atc or stc
They are good for their size
Thanks to all for your responses TribbAlso - I have the ATX (angled modular) and it's an incredible spotter.