All I can say is that my 5D with Tokina 28-80/2.8 can focus on wedding
reception dance floors in light so low that I can hardly see the people
I'm focusing on in the viewfinder. That is the principal reason I
bought it. But since I added a 540EZ flash unit it can now focus in
total darkness out to 15 meters.
Your Tamron 70-300 (I assume) is f/4-5.6 so you're one to two stops
down. Try a 2.8 lens for the difference.
Chuck Norcutt
C.H.Ling wrote:
> Even the 5D II which claimed has been taking care of AF issue at different
> color temp. has problem, it fail with my Tamron 70-300 when I was shooting
> my son's U. Grad. Ceremony inside a hall. For day time shooting it was
> perfect, similar problem happen with my 40D but it could be a lens and
> camera matching issue.
>
> C.H.Ling
>
> ----- Original Message -----
> From: "Chuck Norcutt"
>
>> Sounds like you need a camera with a better auto-focus system.
>>
>> Chuck Norcutt
>>
>>
>> Ken Norton wrote:
>>> Even the best auto-focus will have a horrible hit-rate in this lighting
>>> condition. Personally, I find auto-focus to be a distraction when doing
>>> this kind of photography because it ends up fighting you and you miss the
>>> "decisive moment". After 1/2 hour of practice or use, you can manually
>>> track and focus better than auto-focus ever can. Your frustration level
>>> will go down greatly. Instead of a 25% hit-rate (shutter-release
>>> priority),
>>> you can up that to 80% hit-rate of in-focus images. (Even the best AF
>>> systems can't muster much better than 25% hit-rate under these specific
>>> conditions using SRP).
>
--
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