|
The mimumum aperture is f22 at 11mm, 13mm and 15mm and f29 at 18mm. The Tamron SP AF11-18mm F/4.5-5.6 Di-II LD Aspherical (IF) takes a 77mm diameter filter. Tamron SP AF11-18mm F/4.5-5.6 Di-II LD Aspherical (. Vignetting. Vignetting (dark corners) is very slight, even wide open at 11mm (f4.5). Sigma 10-20 10mm f4, Tamron 11-18 11mm f4 Tamron 11-18 11mm f4, Sigma 12-24 12mm f4.5 Sigma 12-24 12mm f4.5. Sigma 10-20 10mm f8 The difference between 10 and 12mm is huge and to me, there are only two uwa's available, the canon apc-s and this sigma with the tamron 11mm a maybe. Tamron USA, Inc., is the US sales subsidiary of optics manufacturer Tamron Co., Ltd. Tamron USA, Inc, referred to as Tamron from here on, is comprised of 3
|