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tunisia wrote:
If anyone else has used the techart with the 10mm M, please let me know. I am awaiting delivery (preordered) of one and am considering the techart pro especially for help with focus with this lens. I also have the zeiss 35 f1.4 m which I see will be a good partner with the techart, but that is not enough to justify the tech for me as I probably would prefer manual focus for most of my shooting, although the techart would conceivably open up a whole new world of action type shots. Also would be interested in how it works with the 15mm voigt m as well. Any insight would be appreciated. Thanks.  ...Show more →
The problem I find with the Techart for manual focus is that when retracted, it is not far enough extended to give infinity focus. My guess is only a tiny amount, like a millimetre. With "normal" lenses, lets say 21mm or longer, the lens's focus mechanism can easily make up for that, but when you use the 10mm lens's focusing ring, the travel is too small. (At least that is my explanation.) In principle it should be possible to put the lens on infinity, autofocus on infiniity, and then switch to manual focus, leaving the adapter parked in the perfect position. Or set the lens at, say, 3 meters, and then focus on something 3 meters away. But I haven't found it as easy as that.
But much of the time, certainly with architectural shots and when there is something clear to focus on, the 10mm does very well with AF. I have had a load of in-focus shots, though with such a wide angle I use the small flexible spot much more than with other lenses. But I have also had situations where I have failed to get it to focus on infinity, which I haven't had with other lenses. And the adapter is obviously brilliant for extreme close ups.
When I got the Techart I was thinking of my large collection of OM lenses, including ones like the 85mm f2.0 and 100mm 2.8, which need accurate focus. It works nicely with those, though it makes me realise that these lenses, or at least my copies, are possibly a little soft at full aperture, though the wide angles are great. But the answer is that I probably just need more practice at learning when and how to use them.
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