From: Richard Sullivan FRPS (firstname.lastname@example.org)
Date: 06/20/01-08:28:53 AM Z
Good points Jeff, though I am not sure that "life" and "depth" are
different factors. It at this point is like judging a symphony performance.
How does one determine which is life and which is depth to von B's 5th?
At 09:03 PM 6/19/2001 -0400, you wrote:
>Richard Sullivan wrote:
> > ...
> > Platinum shows less of a difference though I swear I can see a
> > difference in that the MH prints seem to have more depth and life but it
> > could be my imagination.
>I can certainly confirm a difference with FL (BL lamps) and the sun.
>But, I have not tried MH lamps.
>As far as depth and substance, it may be your imagination. I have
>attained excellent depth and substance equally well with both FL and the
>sun. Although overall I prefer the sun which may take into account some
>of this life attribute. My preference in not just due to sharpness, but
>seems to partly involve color, and mostly this life thing.
>Trouble is, the availability of the sun is limited. So maybe when I get
>a larger area I can add MH lamps. However, I will keep the BL lamps as
>they do make some excellent prints. And as Dick mentioned, some images
>may just work better a certain way. All of my folded axis work was
>exposed with BL lamps with two negatives, emulsion to emulsion (back
>side of Tri-X to coating), and they still show incredible sharpness.
>And with a couple taking more than 3 hours to expose certainly would
>have make use of the sun more challenging. [Note that my BL lamps
>typically expose about 4.5 to 6 minutes for a regular negative, about
>25% to 30% more exposure than the sun in Phoenix or Florida.]
>Part of the consideration can also be the resolution that the substrate
>is capable of handling. For example, a rough paper may not show a
>resolution difference between diffuse and collimated light. A rough
>enough paper may be a good way to compare MH and FL lamps without the
>distraction of a resolution difference.
>Jeffrey D. Mathias
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