Tamron Adaptall SP 500mm f8 (Model 55BB) for Pentax K brand_Arri which I guess is the

which I guess is the camera equivalent of tying a knot in a cherry stem

It doesn't zoom

2 5500K lamps

tested accurate

Tamron Adaptall SP 500mm f8 (Model 55BB) for Pentax K brand_Arri which I guess is theThe Tamron Adaptall SP 500mm f8 is a compact telephoto mirror lens that packs a fair bit of magnification into a package less than 10cm long. To be fair, it's also about 9cm wide, but that's still pretty packable for a 500mm lens. Downsides to this type of lens is that it's manual focus only, somewhat dim at f8, you can't change the aperture at all, and out of focus highlights look like little donuts. But if you need a lot of magnification every once