Why do you guys want to close down?
Get a sharp focus point and freeze the frame while reducing noise and
increasing dynamic range by means of reasonable ISO/ASA for the camera
instead is my tip
Amities
Philippe
Le 21 oct. 13 à 21:50, Chuck Norcutt a écrit :
> But at only ISO 320 and f/3.2 (wide open at 25mm) it is only equal to
> the E3 at f/5.6 and ISO 1000. I think the E3 is the easy winner.
> But I
> think I'd take the E3 to ISO 1600 and close the lens a bit for more
> depth of field which was one of the problems at a distance of only 2.3
> meters.
>
> Chuck Norcutt
>
>
> On 10/21/2013 10:33 AM, Ken Norton wrote:
>> Ah, but the A1's ISO isn't quite accurate, either. ISO 100 is
>> actually
>> 160 (based on midtone), 200 is 320. Beyond that, I'm less likely to
>> use it. I rarely use it at 400, but it does give another 1/3 stop
>> gain
>> or so. It's hard to tell at taht point because the noise floor starts
>> to skew everything.
>>
>> But set to ISO 200, wide-open, the A1 probably would have done just
>> fine. And it is nearly silent other than faint clicks.
>>
>> I've used the A1 a ton for this exact type of application. What I
>> have
>> learned is to overshoot because you're always fighting the shutter-
>> lag
>> and also you are fighting subject motion. It can take me 4x as many
>> shots to get an acceptable one compared to a regular DSLR, but the
>> near silence and the flexibility of the lens outweigh the
>> disadvantages in those circumstances.
>>
>> AG
>>
>> On Mon, Oct 21, 2013 at 8:20 AM, Chuck Norcutt
>> <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>>> I'm skeptical but give it a try. It just might work. Under the
>>> same
>>> conditions as shooting the violinist at, say, 2.2 meters and 100mm
>>> f/5.6
>>> the A1 should allow shooting at 25mm and (guesstimate) wide open at
>>> f/3.2. That would give a slight (10%) depth of field advantage to
>>> the
>>> A1 along with a 1-2/3 stop advantage for exposure. The A1 also has
>>> "anti-shake" image stabilization, an advantage over your manual
>>> Zuikos.
>>>
>>> The drawbacks to the A1 are a maximum ISO of 800 which, along with
>>> the
>>> 1-2/3 stop advantage of shooting at f/3.2 gives the equivalent
>>> exposure
>>> of ISO 2500. Sounds good but the drawback is that the A1's ISO
>>> 800 is
>>> really noisy. Another problem is that the A1's very early contrast
>>> detect autofocus works poorly in low light. It might be necessary
>>> to
>>> focus on some brighter proxy and then switch to manual focus to
>>> keep the
>>> camera from focus hunting.
>>>
>>> I suspect the E3 with an autofocus lens with 50-100mm range and
>>> set on
>>> maximum ISO will still win the contest... but I could be wrong.
>>>
>>> Chuck Norcutt
>>>
>>>
>>> On 10/21/2013 8:54 AM, Brian Swale wrote:
>>>> Ken wrote ( and others made helpful analytical comments).
>>>>
>>>>> &> My thoughts exactly. Brian was going to take picture in a
>>>>> challenging
>>>>> &> situation, light-wise. It seems that he did not take the
>>>>> right tool with
>>>>> &> him.
>>>>> &>
>>>>> &> Agreed. He should have used an iPhone with Instagram.
>>>>> &>
>>>>> &> Ken Norton
>>>>
>>>> In retrospect, maybe I should have charged up the Minolta A1. It
>>>> yields 5 MP which would
>>>> have been adequate, is totally silent, has a 7x optical zoom that
>>>> goes from 28 to 200mm, and
>>>> is not a visually dominating camera for a public setting.
>>>>
>>>> I'm charging it up now and will run a few trials ...
>>>>
>>>> I have neither an Eyefone nor an Eye Pad.
>>>> A Motorola "Rugged" flip-phone does me just fine.
>>>>
>>>> Brian Swale
>>>>
>>> --
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>>
>>
>>
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