A Clark2

Ok, 122 degrees versus 84 degrees. Certainly far less than double, as the third diagram seems to indicate.

Tim Devine, the third illustration in your link is misleading. I measured it and the two largest rectangles are 128mm and 64mm wide on my screen, ie exactly 2x. This is not what the numbers below...

That is not true. When the lens is much closer to the sensor than the size of the sensor, the angle of view is only a little less than 180 degrees. Do the geometry if you don't believe me. Draw a...

I don't see much point in such a short focal length zoom. The FOV is only slightly different between the ends of the zoom range because the focal length is very short compared to the 42mm diagonal...

I used Luminar when it was only available for Macs (!), but I had to give it up because they removed the channel mixer, which I need for my infrared photography. Another thing I disliked was the...