- Aperture Users
- Aviation Group
- CCD Images Galour (no CMOS)
- DxO users
- Elite Imagery with the Sigma 150-600mm and ANY Nikon body
- in explore
- Kenko Teleconverters
- MTO 1000mm tele lens
- National Geographic Photos Group
- Natuurfotografen van het Noorden
- Nikkor 200-500 mm f/5.6E ED VR FRANCE
- Nikkor AF-S 200-500mm f/5.6E ED VR
- Nikon Capture NX - Gruppo utenti italiani
- Nikon Capture NX2 Users Group
- Nikon Club Nederland
- NIKON D200 USERS
- Nikon D7100 / D7200/ D7500 CLUB
- NIKON D7100 BIRDS
- Nikon Nature
- Nikon Nikkor 400mm f/2.8 super telephoto prime
- Nikon ViewNX-i
- Nikon Wildlife, Flowers and the Beauty of Nature
- Photivo
- PLANET ANIMAL (animal planet)
- Rawker /Raw Converter
- RPP
- Samyang 16mm f/2.0 ED AS UMC CS
- Sigma 150-500 OS
- Sigma 150-500mm F5-6.3 DG OS HSM
- Sigma Lenses
- The Birds Of Flickr
- Vogels Nederland
- Vogels, Nederland.
- Wildlife Photography