Constant 2.8 is fast for a zoom lens. The 540EZ flash unit has a red
focus assist beam effective up to 15 meters. I've only used it a couple
of times but it does speed focusing in very low light.
Chuck Norcutt
John Hudson wrote:
> Chuck .............. an f2.8 of any brand is not that fast. "Fast" is f2 or
> better is fast; try an f1.0 for fast. I did once !. And how does one focus
> in "total darkness"?
>
> jh
>
>
> ----- Original Message -----
> From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Sent: Friday, January 16, 2009 9:47 PM
> Subject: Re: [OM] dance photo shoot
>
>
>> 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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>>
>
>
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