« on: November 01, 2013, 08:52:48 AM »
Also nice that it takes 77mm Filters by mounting them on the filter thread on the screw in hood.
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Some sort of diaphragm shutter could prevent dust from entering the camera during lens changing.
I keep wondering why they do not make a TC with zero power. That does not change magnification or degrade lens quality. Then we could leave the 'plain glass' on the camera and change lenses without fear of dust on sensor. We could just blow away, wipe away the dust from the plain glass.
Nice idea ya? I wish I could manufacture this and sell! lol
Nice to know!I modified my old 350D to full spectrum. Still testing it and need something to replace the IR-Filter to get infinity focus back.
The 350D (and 30D and one other) has a focus screw in the light box that can be adjusted with a 1.3mm (0.5 inch) allen wrench. I replaced my IR cut with a thinner piece of UV filter cut to size and then adjusted focus.
It still has a little front focus at f/1.8, but at f/5.6 and up it's bang on. Good enough for my uses! Since IR photography works BEST midday in bright sunlight I don't see many times where I'll be shooting below f/8, and when I will (i.e. macro or really nice DOF shots) I'll just focus bracket. I could have adjusted the focus more (and I might) but my allen wrench is bent quite a bit, I don't want to bend it any more for fear of breaking it!