| f/2.8 | f/4 | f/5.6 | |
| Hanimex |  |  |  |
| Pentax |  |  |
The original photo:
As expected, at f/2.8 it's pretty bad, getting better as I stop down. Of course the Pentax shows no image at f/2.8 so even a bad image is better than nothing. Peak performance is obtained at f/8, degrading due to diffraction at f/11.
The Pentax is better at all apertures except f/2.8 (obviously). It also exhibits higher contrast, almost certainly due to the better coatings. It did cost me $40 on ebay (as opposed to $1.00). However when factoring in the cost of shipping, the Pentax is "only" four times more expensive (about $60 versus $15). Is it worth it? of course. But sometimes you need the faster aperture.
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