Focus adjustment
Posted 12/10/2009 - 06:20 - Helpful Comment
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You use minus amount for front focus, ie to get the camera to focus further back you need to use a minus amount and conversely, to get the camera to focus further forward, for back focus, you need to use positive adjustment.
I do not think that there is any relationship between a focus chart and the actual amount of focus adjustment of the camera and lens combo.
I do not think that there is any relationship between a focus chart and the actual amount of focus adjustment of the camera and lens combo.
Cameras:K-7/K20D/*ist D/K10D
Lenses:DA14 f2.8, A16 f2.8, FA20 f2.8, FA31 f1.8, DA35 f2.8 macro, FA43 f1.9, FA50 f1.4, A50 f1.4, A50 f1.2, FA50 f2.8 macro, DA*55 f1.4, FA77 f1.8, DFA100 f2.8 macro, A100 f2.8, DA*300 f4, FA*300 f4.5, DA10-17 FE, DA12-24 f4, DA*16-50 f2.8, DA17-70 f4, FA*28-70 f2.8, DA*50-135 f2.8, DA*60-250 f4, FA*80-200 f2.8.
Flashes:AF540FGZ, AF360FGZ
Lenses:DA14 f2.8, A16 f2.8, FA20 f2.8, FA31 f1.8, DA35 f2.8 macro, FA43 f1.9, FA50 f1.4, A50 f1.4, A50 f1.2, FA50 f2.8 macro, DA*55 f1.4, FA77 f1.8, DFA100 f2.8 macro, A100 f2.8, DA*300 f4, FA*300 f4.5, DA10-17 FE, DA12-24 f4, DA*16-50 f2.8, DA17-70 f4, FA*28-70 f2.8, DA*50-135 f2.8, DA*60-250 f4, FA*80-200 f2.8.
Flashes:AF540FGZ, AF360FGZ
Posted 12/10/2009 - 11:53
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Thanks Lance.
Posted 12/10/2009 - 12:20 - Helpful Comment
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Just a side note though but when doing this indoors under unnatural lighting (mostly yellow colour) the AF can be off outdoors since that's natural lighting so different colours.
The AF use a beam splitter so it splits the light and every colour of light breaks differently, that's why we have rainbows.
The AF use a beam splitter so it splits the light and every colour of light breaks differently, that's why we have rainbows.
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Posted 12/10/2009 - 14:30
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Thanks Stefan. I'm setting the adjustment outdoors as that's where I expect to use the camera most. That said, what's the colour temperature of flash? Daylight?
Posted 12/10/2009 - 15:39
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Most modern flashes are daylight (5000K) I believe.
But studiolights are around the 3000K, and i'm not sure about that either
But studiolights are around the 3000K, and i'm not sure about that either
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Posted 12/10/2009 - 16:03 - Helpful Comment
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Quote:
what's the colour temperature of flash
That's only applicable if you are focussing with the flash (which isn't usual). It's more likely the AF will be working under tungsten or fluorescent lighting - with the flash for the main exposure.what's the colour temperature of flash
Just a thought
Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)
(For gallery, tips and links)
Posted 12/10/2009 - 19:27
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Thanks Matt. I guess the camera will use whatever light is available to focus before using the flash itself as a focus aid?
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2470 posts
17 years
South London
So, can anyone help me with these questions please?
1 For front focus is the camera adjustment + or -?
2 Is the amount of adjustment in-camera directly related to the degree of front focus revaled by the chart(s)? In other words, does 2mm FF = x adjustment in-camera?
Thanks!