smedly64 Posted December 20, 2004 Share Posted December 20, 2004 I use a D300 with the 100mm 2.8 macro and love the results. Moderateprice and great shots. But.It seems to be slow to snap to focus. sometimes won't grab focus at all.I keep a 420ex on board most times. Anyone have similar issues? Link to comment Share on other sites More sharing options...
pok_hon_wally_yu Posted December 20, 2004 Share Posted December 20, 2004 If you are using the older non-USM version, that's kinda normal. Also, if you are not shooting macro, you may get faster focusing by limiting the focusing range. Link to comment Share on other sites More sharing options...
greg_tan Posted December 20, 2004 Share Posted December 20, 2004 That's normal even for the newer version. It hunts a lot especially in low light. I didn't like it so I ended up getting the 100 f2. Link to comment Share on other sites More sharing options...
bestactionshots Posted December 21, 2004 Share Posted December 21, 2004 I have 100/2 and it's focusing fast for hockey and basketball games. I like this lens so far. Link to comment Share on other sites More sharing options...
mr.wind-upbird Posted December 21, 2004 Share Posted December 21, 2004 I've noticed that the 100/2.8 USM hunts a lot to find focus in low light, but on the other hand, it does have an awfully long way to travel from zero to infinity. Most of the time when it's too dark for it to focus, it's too dark to shoot anything decently anyway. Link to comment Share on other sites More sharing options...
yakim_peled1 Posted December 21, 2004 Share Posted December 21, 2004 >> it does have an awfully long way to travel from zero to infinity. IIRC, it has a focus limiter switch. Happy shooting, Yakim. Link to comment Share on other sites More sharing options...
ron c sunshine coast,qld,a Posted December 21, 2004 Share Posted December 21, 2004 I had the non usm version and was impressed with it's focus speed considering the weight of the lenses it had to move around to focus.It was about 50% slower to focus than my 50/1.8 (if i remember exactly)which is not too bad. <P>However there are some issues as others say. Using the focus limit switch is essential if there is any chance of the camera missing focus. <br>The other thing is -because the focusing lens parts are kind of heavy compared to basic small lenses,there is a tendencey to blow right past the focus point.I have a feeling this would happen a whole lot less on a 1 series body but have never had the opportunity to test the theory Link to comment Share on other sites More sharing options...
psoriano Posted December 22, 2004 Share Posted December 22, 2004 I have the same 300D + 100 mm 2.8 macro (no-USM) combo, with the same results: great shots and hunting for focus up and down when aiming to low contrast areas. So, use central point to focus and avoid low contrast areas such as uniform surfaces of walls, sky,... and you will reduce that annoying tendence Link to comment Share on other sites More sharing options...
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