Reviews, news, data, and techniques for mirrorless cameras of all brands, since 2009
Thom's eBooks for Nikon and Sony cameras (New: Complete Guide to the Nikon Z50 and Complete Guide to the Nikon Z5)
What's New: bythom.com
DSLRs: dslrbodies.com
Film SLRs: filmbodies.com
Nikon Z system: zsystemuser.com
Pergear appears to be a Hong Kong store/distributor that sells multiple brands of products, including some under their own name (likely sourced from other vendors).
Many Pergear products are available on Amazon [affiliate link].