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Re: Flash and high ISO doesn't help
In reply to rmwpg,
3 months ago
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rmwpg wrote:
discusaigon wrote:
rmwpg wrote:
Any thoughts?
I suppose you did try to open aperture at max and try to go to higher ISO ?
the 20-50 does not give a lot of light at 50 mm so you will have to help him with a Flash or open aperture or go to higher ISO
the 20-50 does not give a lot of light at 50 mm
That's the problem. f5.6 and low light.
The 20-50mm II is a fantastic lens. It's probably one of the sharpest zooms I have ever used (and I used a lot). It's just not the best lens for low light.
Flash (without AF light) and high ISO doesn't help at all. Even the best AF systems are slower in low light, but contrast detection AF sucks in this regard. The good news is that fast prime lenses significantly improve the situation. My 30mm f2 focuses much better in low light than my 20-50 or my 12-24. The new 45mm f1.8 should be even faster.
If you don't want tho buy another lens, you could also use a video LED light instead of a flash. It helps the AF and often the pictures are nicer than the usual flash images.
--
Regards, Robert
www.sondek.smugmug.com
Thanks. Yeah, flash and ISO doesn't matter. I know it is the 5.6 aperture causing the auto focus issue. I've probably had 15 cameras of varying qualities that have focused in the exact same scenario. That is the lamest, poorest excuse of a focus assist lamp I have ever seen. That 45f1.8 sounds interesting though and the price isn't bad either. That would be the solution alright.
Anything on the overexposure issue?
Also, try turning off the assist light, just like on the NEX it can cause issues with focus if the focus point isn't actually illuminated by the assist light. Secondly, you can change the size of the focus point which can help in some conditions, try making it larger or smaller. If you are in selectable focus point mode press "OK" and then use the dial to change the size.
As for exposure issue, I think the default is to lock the exposure with the focus point if I recall? This might make it brighter than expected if the focus point is on a dark subject. Do you have some samples?
What I say refers to single point focus mode. I never use anything else so can't comment on the multi point modes.
Eric
--
I never saw an ugly thing in my life: for let the form of an object
be what it may - light, shade, and perspective will always make it
beautiful. - John Constable (quote)
See my Blog at: http://www.erphotoreview.com/ (bi-weekly)
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