View single post by chrisbet
 Posted: Fri Oct 16th, 2020 12:25
chrisbet



Joined: Fri Feb 8th, 2019
Location: Leigh On Sea, Essex , United Kingdom
Posts: 1428
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jk wrote:
Robert, does the lens get less sharp when you shoot a distant point and use focus past the infinity mark?   
Lens theory says it shouldnt matter as parallel rays are parallel (e.g. notional infinity source).

That does not  sense to me - surely if the lens goes beyond infinity in terms of its focussing, then parallel rays will be focussed to a point which is not in the sensor plane?



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