What? Do you mean to say that you have no idea of the angular velocity
of your camera body when shooting macro? Gimme a break!
Chuck Norcutt
On 9/21/2013 10:53 AM, DZDub wrote:
> On Fri, Sep 20, 2013 at 5:25 PM, <usher99@xxxxxxx> wrote:
>
>> It is relevant to any listee using OM
>> 5D (c, II, or III) as digital back for OM macro lenses or indeed on OM
>> as I plan to do.
>>
>
> Relevance acknowledged. Paying attention.
>
>
>> A bit more investigation shows that at pixel width "p", angular
>> velocity of cam w, one pixel blur should occur at shutter speed of p/(f
>> *w). No?
>> Thus shutter speed required for a given blur is proportional to 1/f
>> where f is the focal length. Magnification makes this more complex but f
>> never drops out. Am getting to the 85% certain confidence level. This
>> is either correct or not , there is no in between.
>>
>
> Could you plug in some numbers maybe? An example would help me. Are you
> proving the old rule that a "safe" shutter speed is 1/f, refining it, or
> disproving it?
>
> Thanks.
>
> Joel W.
>
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