Digital BW, The Print

You think as I do, H..

The rules have to be adjusted for IR. But, I think Mark should be able to maximize his vision alright. In saying that, I again say I don't know what his sensor is capable of.

gar

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On 3/8/08 at 11:18 AM Harold Jackson wrote:

>Clayton -- 
>  The original question that Mark asked was somewhat different than how
>does one obtain sharp focus in the foreground and background of an image? 
>And from there, how does one change what is emphasized in the image? His
>question has to do with what is acceptable practice in landscape
>photography.
>  This to me is a question of aesthetics.  He asked the question: "Is this
>ever done in landscapes?"  Which implies that there is some sort of list
>or set of rules for shooting landscapes. 
>   
>  >Question - for shots like this where you are stuck with a background 
>>of other trees and you have other trees to right and to left and 
>>sometimes in foreground - can you ever use DOF to emphasize your main 
>>subject? Nail focus on main subject but go very soft using DOF on, 
>>say, the background? Is this ever done with landscapes?
>   
>  Even his clarification is just an amplification of this question.  So,
>while instructive, it seems to me that your reply on how to calculate the
>hyperfocal distance is off the mark.  But most importantly, the
>wavelengths of light in the IR portion of the spectrum are longer and
>therefore do not conform so neatly to formulas that are used to calculate
>hyperfocal distance.  Add to that the fact that hyperfocal distance
>calculations don't account for diffraction (which is a significant issue
>in IR photography because it is (IR photography) is done when the sun is
>brightest) and I think mere technical calculations of hyperfocal distance
>don't supply the answer to Marks question.  As I'm sure you recall, older
>film cameras' had a separate mark on the lens that marked IR infinity that
>was different than visible spectrum infinity. 
>   
>  So, I think that my answer earlier about artistic judgment was closer to
>the point in responding to his question. I say this not to point out that
>what you're (Clayton) saying is incorrect but that what he wants to know
>can't be answered with technical calculations.  These opinions are just my
>own and, of course, others may think otherwise.
>
>
>
>
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