Products & Suppliers (that we have used for years)

Tripods & Ball Heads Redux (an oft-read BCPA blog on this most important subject)
DxOMark (excellent, objective, scientific testing of cameras and lenses with published results by DxO Labs)

Canon Close-up Lens (to turn a 70mm+ lens into a macro - we use the D500 for our 77mm lenses)
Hoodman Loupe (indispensable for viewing images on camera LCD screen, with diopter, too! - This is the tool our participants lust after.)
3-Axis Hot Shoe Bubble Level (indispensable for panoramas or for those whose images list)
Microfiber Lens Cleaning Cloths (look for "fine optics" but NEVER paper or cloths for eyeglasses that have different and less-sensitive coatings)
Really Right Stuff (for excellent ball-heads, L-brackets, etc.)
ROR (Residual Oil Remover, the only lens-cleaning solution we allow near our lenses)
Singh-Ray filters; alumni should e-mail us for the code to get a nice discount.
Spyder (by Datacolor - one of the excellent calibrators for your monitor)
Visible Dust 1.0x Sensor Brush Cleaning Kit, extra swabs, & blower (for cleaning your camera sensors)
And while you are at it...
Cleaning Digital Cameras (the hows and other resources for cleaning your camera's sensor)

Used with permission
from Foto-Care Ltd.
(copyrighted image)

Adobe (info and downloads plus tutorials & forums)
Adorama (camera equipment at very good prices)
Amazon (don't laugh, we get some of our photo supplies here)
American Frame (a much cheaper route to go for framing your own photos, and our first choice)
B&H (camera equipment at very good prices)
Cameta Camera (for new, used, and refurbished equipment)
Cheap Joe's (good prices for art and framing supplies)
Foto-Care (about the same price as the big houses, but with superb service, rentals and used equipment, too)
FramesUSA (we are new to them, but service, pricing, packing, and shipping are A1)
Jerry’s Artarama (long-time art supplier)
PictureFrames (formerly Graphik Dimensions)