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Taped Contacts - 1.4 X

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Author Topic: Taped Contacts - 1.4 X  (Read 690 times)
brianb
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« on: June 23, 2009, 12:17:51 am »
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So, where I am on this is that  I would still   retain auto  (which I didn't before I put the tape on)  but lose one stop ?
Yes but don't be surprised if the auto is unreliable.  The AF sensor needs a certain "steepness" in order to detect phase lock correctly. I've noticed with recommended Canon lens/extender combinations that AF is not quite as accurate, for astro subjects I definitely prefer to focus manually using the type S precision focusing screen and a magnifying angle finder.
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