[pure-silver] Re: Ralph Lambrecht / EM10 enlarging meter?
- From: DarkroomMagic <info@xxxxxxxxxxxxxxxx>
- To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 06 Jan 2005 21:01:13 +0100
Mine is marked '24'.
Regards
Ralph W. Lambrecht
On 1/6/05 6:57 PM, "Richard Knoppow" <dickburk@xxxxxxxxxxxxx> wrote:
>
> ----- Original Message -----
> From: "DarkroomMagic" <info@xxxxxxxxxxxxxxxx>
> To: "PureSilverNew" <pure-silver@xxxxxxxxxxxxx>
> Sent: Thursday, January 06, 2005 9:45 AM
> Subject: [pure-silver] Re: Ralph Lambrecht / EM10 enlarging
> meter?
>
>
>> I'll send you what I have directly. However, I'm not sure
>> my calibration
>> works for you. Every EM10 is a bit differently calibrated,
>> the calibration
>> number is on the bottom of most, but I don't know what it
>> means.
>>
>> As Richard already stated, you need to calibrate the dial
>> in stops. A stop
>> is a density difference of 0.3 log. Paper contrast is
>> defined in negative
>> density ranges. For example grade 2 has a negative density
>> range of 1.05,
>> consequently, 3 1/2 stops. I'll send you a table of those
>> too.
>>
>>
>>
>>
>>
>> Regards
>>
>>
>>
>> Ralph W. Lambrecht
>>
>>
> The number on the bottom is a nominal setting for
> Ilfochrome. The meter was originally designed for
> Ilfo/Cibachrome printing. Mine is marked 28, I suspect that
> most of them have this number. It is about right for Iford
> and Kodak VC paper for about a 20 second exposure, at least
> on my enlarger. I originally calibrated the dial to allow
> using other times and stops and then realized I could use it
> as a densitometer over its range of sensitivity. Its a very
> useful meter despite being quite cheap. I think they are
> still around $30 US.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
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