wizard Posted December 18, 2009 Share #21 Posted December 18, 2009 Advertisement (gone after registration) What are those advantages? Very curious. Well, if due to thermal expansion or contraction of a lens the infinity focus point does wander to a position beyond the infinity mark on the lens, you will only be able to see that when using an SLR. And only if you can see it will you be able to take advantage of it, read adjust your focus accordingly. Andy Link to post Share on other sites More sharing options...
Advertisement Posted December 18, 2009 Posted December 18, 2009 Hi wizard, Take a look here Focus beyond the infinity stop - 35/2 asph. I'm sure you'll find what you were looking for!
masjah Posted December 18, 2009 Share #22 Posted December 18, 2009 Well, if due to thermal expansion or contraction of a lens the infinity focus point does wander to a position beyond the infinity mark on the lens, you will only be able to see that when using an SLR. And only if you can see it will you be able to take advantage of it, read adjust your focus accordingly. Andy Some instruction leaflets seem to imply that the infinity marking remains accurate despite expansion and contraction. (It sounds a bit paradoxical - I think something must move around internally which needs the extra capacity.) However the leaflet for the 280/4 says it is to facilitate focussing around infinity. Link to post Share on other sites More sharing options...
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