Zeiss modified siemens star chart zip file#
Zeiss modified siemens star chart series#

Taking shots of printed text at close distance will yield no reliable data, as the slightest deviation in angle will critically affect the sharpness. The lens is tack sharp wide open right to the corners.

I had posted previously in a FE 35/1.4 thread of a brick wall at mid distance at f/1.4 and 5.6. Just a simple photo of a simple page sheet at 1.4 would show a lot.

Zeiss modified siemens star chart zip file#

If you PM me, I'll be happy to send you a link which will you allow you to download a ZIP file containing my test results.Ĭharles, a few more positive data points might be enough to 'prove' that Aussies got most of the good copies. In the future, however, I'd start with Fred's test.

Zeiss modified siemens star chart series#

Then, out of curiosity, I ran a series of decentering tests: Roger Cicala's test using a Zeiss Modified Siemens Star Chart, Jim Kasson's test using a small LED flashlight, and the gletscherbruch test using a distant subject (although my test subject was about 100 meters away because the people and objects I photograph are always relatively close to the camera).Īt the time I did my tests I wasn't aware of Fred's Decentering test and when I did find out about it I was already convinced that my FE 35/1.4 wasn't decentered. Initially I did a brick wall test which showed that the right side of the frame was as sharp as the left side (or close enough). I didn't take any pictures like you made because I'm not convinced that photographing a printed sheet of paper at close range would give me enough useful information about the lens. Maybe through some quirk of fate Sony sent only good ones to Australia.Ĭan we see some of your pictures like the one I made with my bad copy? Make that six out of six because I have a good copy of the Distagon FE 35/1.4 too. Of course these people are in some sense random: they aren't preselected to want to tell the web about their bad copy. But my own experience of it, and all the people known to me personally who have it (admittedly only five - photo nut mates here in Oz) is five out of five good copies.