Hi all,
I've been sweating over lens choices for months and finally decided to lay out the Photozone 10mpx numbers on a combined set of Excel charts. I used the APS-C 10Mpx test results (including a couple of Nikon) because they had the more extensive range of lenses tested and the results are hence more uniform. I've also cheated a bit by calling 1.9 as 1.8 in some cases and entering the 77LTD results on the 70mm line... they still give a reasonable comparison I feel. Single focal-length lenses figures were also repeated on an adjacent focal length column because they were not shown in the graph as a dash. Obviously the graphs can be refined some.
I started this process to combine all the graphs and charts into a more useful summary of the resolutions of the lenses tested for my own usage but felt others may find them informative in some way. I've supplied the charts here as a PDF file for now but may convert them to graphics for upload here as attachments if enough interest occurs.
I was shocked to see my DA* 200 F/2.8 and FA* 300 F/4.5 were NOT as sharp in the center as the Pentax zooms listed at 'working' apertures. The borders are another story apart from the 60-250 however - I'm thinking of selling both and just having a 60-250 for that focal range. I expect selling those two lenses would more than cover the cost.
I am still working on my Excel charts for CA etc but felt that wasn't a priority so much as I tend to use PP for those most of the time. Of course some CA's won't budge in some cases so it's still important to have a decent lens.
When viewing these charts try to keep in mind that:
2350 = Maximum (some numbers were higher.. not sure if they were errors in the tests)
2050 = excellent
1750 = Very Good
I showed the results starting at 1100 on the Y-axis so that the minimum values were displayed but also offered enough scale to show the graphs in more detail than if all were started at zero. When the graphs are displayed from zero on the Y-axis the differences between the lenses look much smaller but it's harder to see some results due to overlaps etc. Try to keep that in mind.
Cheers and I hope you find them useful.
Steve
Attachment 108099
Last edited by bossa; 12-05-2011 at 01:25 AM.