How is the DOF of the 100mm?
Did someone ever publish a DOF scale (for a H4D40 sensor)?.
Hi,
I'm not exactly sure what you are looking for. Are you looking for a comparison of the quality of defocus blur (Bokeh), or just a DOF tool that includes the wide aperture of that lens?
Almost all lenses follow the same general DOF principles, which are based on symmetrical optical designs, with regard to the amount of defocus blur (and diffraction at narrower apertures). Deviations from the general rule are caused by the pupil magnification factor as a result of the asymmetrical optical design. The mathematical outcome allways depends on your preference of the circle of confusion (COC) criterion. The COC criterion is a function of the output magnification and viewing distance requirements.
The influence of the sensor used, it's sampling density or sensel pitch, is only reflected by how accurately the blur is sampled. When your requirements call for per-pixel-sharpness (e.g. for large output which should allow close inspection), then you need to adjust your COC criterion to something like 1.5x the sensel pitch.
IOW, any decent DOF tool that allows to specify the COC criterion should answer your questions about the amount of blur. As for the bokeh, I've heard that the Fujinon designs have a less pleasant bokeh, but whether that applies to this lens as well, I'll leave that to others.
A certain amount of DOF can be restored to detail afterwards by using deconvolution sharpening. Blur caused by diffraction at narrow apertures stands the best chance of recovery, blur caused by defocus can cause more problems to restore without artifacts.
Cheers,
Bart
