AXENA Senior Member  412 posts Joined Dec 2003 Location: Toms River, NJ More info | Nilsen wrote: Hmm very nice shots - what did u use for lightning ? Who me?? If you mean my shots, I used 3 speedlights into brollys and a modelling lamp for the sitting portraits... for the candids, either natural light at 800-1600 ISO or a 580EX with a Lumiquest 70/30 on top. Some had the OmniBounce. Gary S. Latimer - C&C always accepted/appreciated!
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AXENA Senior Member 412 posts Joined Dec 2003 Location: Toms River, NJ More info | summerwind4 wrote: flourescent can cuase back focusing, and incadscent can cause front focusing. IS THIS TRUE???? I learn something every day.... does this really happen... if so... that would explain some of my 24-70 issues..... can someone confirm this>? Gary S. Latimer - C&C always accepted/appreciated!
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AXENA wrote: That is... if you were referring to my shots. If you were thanks. If not.... sorry about that... thought you were talking to me. Smile - i was refering too u - Axena - foolish of me not pointing that - sorry. Canon 5D Mk II
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AXENA Senior Member 412 posts Joined Dec 2003 Location: Toms River, NJ More info | Jan 03, 2006 17:44 | #19 well... then, I thank you kindly! Gary S. Latimer - C&C always accepted/appreciated!
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ddelallata Goldmember  1,191 posts Joined May 2005 Location: Brownsville, Tx USA More info | AXENA wrote: IS THIS TRUE???? I learn something every day.... does this really happen... if so... that would explain some of my 24-70 issues..... can someone confirm this>? The difference in lighting sources got me thinking about the copy I returned for front-focusing, but upon reviewing my test images, even the ones taken outdoors were OOF. Dr. David de la Llata
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AXENA Senior Member 412 posts Joined Dec 2003 Location: Toms River, NJ More info | ddelallata wrote: The difference in lighting sources got me thinking about the copy I returned for front-focusing, but upon reviewing my test images, even the ones taken outdoors were OOF. Well it definately has me thinking now, particularly because the focus test I did last night was done under hotlights, and not natural lighting.... or even close. Color temp was definately way warm, as was the actual temp of the room... but that's a whole other issue. Gary S. Latimer - C&C always accepted/appreciated!
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MrChad Goldmember  2,815 posts Joined Aug 2004 Location: Chicagoland More info | AXENA wrote: Well it definately has me thinking now, particularly because the focus test I did last night was done under hotlights, and not natural lighting.... or even close. Color temp was definately way warm, as was the actual temp of the room... but that's a whole other issue. If incadescent / tungsten / halogen can affect focus..... that badly, that is something I need to know.... but still... why it only affected the 24-70L and not the other lenses I own is still a mystery then..... Oh well...... focused OK today.... so, who knows.... This doesn't make sense, if you told me it changes the speed of the AF I'd maybe believe that since lower light tends to strain AF systems so I could rationalize that various light temperature could effect the speed to some odd degree. I kaNt sPeL...
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sasa007 Senior Member 267 posts Joined Sep 2005 Location: Toronto More info | MrChad wrote: This doesn't make sense, if you told me it changes the speed of the AF I'd maybe believe that since lower light tends to strain AF systems so I could rationalize that various light temperature could effect the speed to some odd degree. But affects the actual focus point location? Then we would need WB settings for AF wouldn't we, and I'd be hosed doing that on film wouldn't I? I do agree with the fact that AF does strain itself in a low light conditions to get a decent in focus photo.Also take into consideration the SHUTTER-SLEDGE-HAMMER-MIRROR SLAM DUNK in a 20D that shakes camera like crazy.I have batt grip and still in a slow speed shakes camera pretty bad.First time when I payed off my visa bill I'll get my hands on 5D! no edits
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AXENA Senior Member 412 posts Joined Dec 2003 Location: Toms River, NJ More info | MrChad wrote: This doesn't make sense, if you told me it changes the speed of the AF I'd maybe believe that since lower light tends to strain AF systems so I could rationalize that various light temperature could effect the speed to some odd degree. But affects the actual focus point location? Then we would need WB settings for AF wouldn't we, and I'd be hosed doing that on film wouldn't I? Wasn't me who suggested it..... I just hadn't heard of it before... Gary S. Latimer - C&C always accepted/appreciated!
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