Here is the case. I shoot a variety of subjects. Some on land, some underwater. Some WIDE and some needing TELEPHOTO and MACRO. On land, I find it easy to carry two cameras to cover a wide range of subjects but the current Canon lineup of lenses isn't wide enough to fill the bill. I was weaned with a Vivitar 20mm lens in my hand on my old screw-mount Pentax Spotmatic. That is about a 90 degree field of view.
90 degree wide allows an extra measure of perspectivie and creativity without fisheye distortion. For APS-C, taking into account the 1.5 magnification factor, that means lenses in the 12- 13 mm range. 1.5 x 13 = 19.5mm which is about 20mm. EVERY MILIMETER COUNTS. However, for APS-C, Canon only has the 10-22 EF-S. ALL THE REST start are woefully inadequate like the closest Canon 15-85 3.5-5.6 IS USM. 15mm = 22.5 in APS-C terms. But it isn't enough.
I want L (Flourite) glass that Canon produces for full frame sensors. I want a 2.8 Lens, not 5.6. The popular 24-70 mm 2.8 L USM is the laughable equivalent of a 36mm in APS-C terms. The widest L Zoom is 16 - 35. 16mm full frame = 24mm for an APS-C or about 70 degrees at the widest. Not good enough. Subjects occur between 35mm and 70mm. THREE milimeters of Focal length cuts off 20 degrees of capability / creativity for APS-C users. Nobody has noticed. If you have, you need get vocal to Canon.
A lens from 13mm - 70mm EF-S 2.8 L would be the perfect solution to accompany a 70 - 200 EF 2.8 L. Subjects occur between 35mm and 70mm. Encourage the rumor. I invite your comments. Part 3 will talk about the huge gap in Canon telephoto lenses.
Shot with my really sharp Tokina 10-18 Fisheye. Stock photo available for sale at ALAMY.
