[pure-silver] Re: Personal Dev Times
- From: <genej2@xxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 12 Apr 2006 10:38:47 -0400
Ralph,
I agree. Wish it weren't so, but that's been my experience for so long, I've
come to accept it too. ASA 400 (advertised)= ASA 2-300 (actual) most of the
time, if I'm interested in shadow detail or there's more than a 3 stop
brightness range in the scene.
>
> From: "Ralph W. Lambrecht" <info@xxxxxxxxxxxxxxxx>
> Date: 2006/04/12 Wed AM 09:31:19 EDT
> To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
> Subject: [pure-silver] Re: Personal Dev Times
>
> Cor
>
> The statement below is incorrect, and has been proven wrong so many times.
> Film is very sensitive to underexposure. Lost shadow detail cannot be
> retrieved with increased development. On the other hand, film is also very
> insensitive to overexposure. I tested film with up to 10 stop overexposure
> and still made excellent prints. However, printing at box speed is
> significantly inferior to exposing at half that speed. Exposing at box speed
> is a compromise, making many assumptions, and might be acceptable for some
> types of photography (sport, street or journalism), but if maximum print
> quality is required, box speed won't get you there. Rule of thumb is box
> speed / 2, or at least 2/3 stop less than box speed.
>
> Next time you expose film, make the test and expose a few frames with 1, 2
> and 4 stops overexposure. You won't believe the shadow detail!
>
>
>
>
>
> Regards
>
>
>
> Ralph W. Lambrecht
>
> http://www.darkroomagic.com
>
>
>
>
>
>
>
> On 2006-04-12 09:13, "Breukel, C. (HKG)" <C.Breukel@xxxxxxx> wrote:
>
> >
> >
> >> -----Original Message-----
> >> From: pure-silver-bounce@xxxxxxxxxxxxx [mailto:pure-silver-
> >> bounce@xxxxxxxxxxxxx] On Behalf Of Ryuji Suzuki
> >>
> >> The part that affects contrast is development time and
> >> temperature. With negative emulsions, exposure error within one stop
> >> is unimportant because negatives are developed to such a low contrast
> >> and the image contrast is boosted at the time of printing. Therefore
> >> it is perfectly acceptable to shoot at the box speed, or maybe half
> >> the box speed, and adjust the development time to print well on grade
> >> 2 paper.
> >>
>
>
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