Re: Focusing/Best time of day

[bond@xxxxxxxxxxx (Ryan Bond)]

>
>
> Hi All
>
> I'm just starting getting into B+W infra-red and have only recently 
> joined this list so please forgive my 'basics' questions.
>
> Focusing:
>
> I've read the FAQs and other articles about adjusting focus to the 
> red index mark.  On my gear (Minolta AF), the index appears at or 
> about f/4.0. If I use, say, an aperture of f/8.0 will I achieve sharp 
> focus without having to adjust the lens?
>
> Time of day/year:
>
> Many articles I have read stress the point that B+W infra-red works 
> best when there is plenty of sunlight.  It looks like I've 
> mis-interpreted here because I read it to mean that the middle of the 
> day provides the best results and consequently have been blasting 
> away with my Dynax on the stroke of noon.  After reading one of the 
> other postings, it appears early/late in the day are the best times 
> as there is a higher proportion of IR at these times.
>
> Would this be the reason why I've not been able to achieve very dark 
> skies (which is the effect I was after) with either Konica or HIE 
> even though I appear to have got the exposure right in one of my 
> bracketed shots?
>
> All my shots by the way, have been taken through either a 25A or Hoya 
> R72 filter.
>
> Many thanks in advance for any advice.
>
>
> 
> Chris Hulme <<chris.h@xxxxxxxxxxxx>>
> Stoke-on-Trent, England.
>
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Topic No. 5