Originally posted by stevebrot I spent a fair amount of time with both of your photos and agree that the 12-24 shot is generally more pleasing, though I suspect that the images would have been more similar if done at the same time. Quality of light varies according to the amount of cloud cover
While it is true that, at least some ways, they would have been more similar if shot in identical light, I still suspect the IQ difference would have been about the same. The DA 12-24 pano was shot at 2:00 pm on June 11, while the kit lens pano was shot in the middle May at 4:10 pm. The 12-24 shot was a jot more than two stops underexposed compared to the kit lens shot (DA 12-24: 1/1000sec f8; DA 18-55: 1/125 f9.5). The two stop difference is largely explained by the use of a polarizer on the 18-55, which generally cuts light by about two stops. I don't think it would be plausible to suppose that the polarizer worsened the color rendition of the kit lens shot. The general effect of a polarizer is to improve the color, not worsen it.
Now I've shot 1,000s of pictures with both lenses, and it's precisely in non-optimal light (such as middle of the day in June), where the differences between the IQ of the two lenses is most striking. In my experience, the glare of mid-day sunshine off of snow is more than the 18-55 can handle. The DA12-24 does a much better job of taming the glare.
Originally posted by stevebrot There is also the matter that the 12-24 shot is technically overexposed by at least 1.5 stops. That gives a greater sense of luminosity to the lake surface and brighter and more vibrant color there, but at the expense of foreground detail in the snow.
Thanks for the input. I think you are right
relative to the monitor used for viewing them. On my calibrated iMac monitor, the DA 12-24 exposure appears spot on, and the differences between that pano and the 18-55 pano are quite significant. On an uncalibrated HP monitor at work, the differences between the two images aren't so striking and the DA 12-24 image does appear a stop or more overexposed.
For what it's worth, when I had a 3x5 test print of the DA12-24 image made by WHCC, it came back about at least a stop
underexposed.