Just got it from one of the bros here...
this combo doesn't vary in mag ratio throughout the whole range.
So I sorta realised that the zoom works as a fantastic MF ring. Works from about 15cm to 2-3m...
Sharpness not v impressive so far (kinda like fresnel filters). But DOF shifts through the focal range, as is sharpness (short/sharp to deep/astig). Where normal focus and EX25 overlaps, it's much sharper without -- obvious CA's with EX25.
Haven't tried anything more than test shots with my metal watch. Will try with better lighting (higher f stops) later.
this combo doesn't vary in mag ratio throughout the whole range.
So I sorta realised that the zoom works as a fantastic MF ring. Works from about 15cm to 2-3m...
Sharpness not v impressive so far (kinda like fresnel filters). But DOF shifts through the focal range, as is sharpness (short/sharp to deep/astig). Where normal focus and EX25 overlaps, it's much sharper without -- obvious CA's with EX25.
Haven't tried anything more than test shots with my metal watch. Will try with better lighting (higher f stops) later.