vince Posted March 5, 2018 Share Posted March 5, 2018 I have used my old Vivitar One 800 f/11 solid cat with several DSLRs including my 80D. Results are good enough for my application, but I find it increasingly difficult to confirm focus visually or with Live View. I believe it's my aging eyes. I want to add a focus confirmation chip adapter to the T Mount to provide data to the 80D. Exposure information would be nice, but I generally shoot in manual with that lens because shots are rarely spontaneous and there is plenty of time to prepare. Still, is it possible to get one preset to f/11 instead f/1.8 like most are? Link to comment Share on other sites More sharing options...
JDMvW Posted March 6, 2018 Share Posted March 6, 2018 I'd suggest a magnifier attachment. Such as these are widely available on eBay and other on-line sources in my experience these glue-on chips can cause positive damage to the circuitry if not placed exactly rightdon't actually work very well even when they don't short-circuit. Link to comment Share on other sites More sharing options...
vince Posted March 6, 2018 Author Share Posted March 6, 2018 I'll look into the magnifier. Thanks JD. And after doing some more homework I realize that whether or not the chip convinces the camera there's a lens attached, autofocus at f/11 is virtually impossible. Link to comment Share on other sites More sharing options...
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