Light density (LS-40) shows too little effect

[TG]

The adjusting of the scanner lights (it's called "Lampenhelligkeit" in the German edition of SF Ai 5.5) in SF Ai shows much less effect as when used in Nikon Scan 3.1.
There it can be adjusted from -2 LW to +2LW and it works great.
<p>In SF it is adjustable from -20 to +20 but the effect is much much less.
<p>I need this function because unfortunately I made the mistake to shoot a 100 ISO film with 400 ISO (My F90 unfortunately does not set back to DX when a new film is inserted - one might forget to set ISO back ...).
<p>I tried this with SF's Auto Density on and off. It didn't really push as much as Nikon Scan does. If anybody is interested in the different results I can mail them as JPEGs.
<p>Have I set something wrong or is this a flaw of SF?
<p>Greetings! TG

<font size=-1>[ This Message was edited by: TG on 2001-11-03 13:37 ]</font>

[Guest]

would like to see, pls mail me at sigmadelta2001@yahoo.com, when u shoot iso100 @ iso400, is not a problem, u could have the film pushed 2 stops from iso100 to iso400 at a local laboratory, we do that all the time.
the brighter the lamp the darker the results, negative is just the opposite(hence the name negative>opposite)!u wanna brighter lamp for overexposed film and dimmer light for underexposed film.

[TG]

Hi Anonymous!
<p>I know about developping such films with ISO 400 (pushing). I do that all the time. The film I was talking about was exposed as ISO 400 by mistake and then developped as ISO 100, also by mistake.
<p>Hence it is too dark (it is a positive slide film). And hence the reason I have to turn the lights up (lighter). But SilverFast 5.5 is not turning them up as much as Nikon Scan 3.1.
<p>This was my question. Greetings! TG

[Guest]

ic, maybe silverfast could make the lamps brighter, good idea!

[ilyons]

On 2001-11-03 18:35, TG wrote:
Hi Anonymous!
<p>I know about developping such films with ISO 400 (pushing). I do that all the time. The film I was talking about was exposed as ISO 400 by mistake and then developped as ISO 100, also by mistake.
<p>Hence it is too dark (it is a positive slide film). And hence the reason I have to turn the lights up (lighter). But SilverFast 5.5 is not turning them up as much as Nikon Scan 3.1.
<p>This was my question. Greetings! TG

Sorry to disappoint you but the lights do NOT go Up or Down. The control you refer to simply extends/reduces the time taken for the scan. Think of it as exposure time rather than cloudy/cloudy bright/sunny control. It's unfortunate that Nikon decided to call it lamp brightness and that this terminology has somehow carried over to SilverFast.

You might try increasing the image brightness using the slider in the gradaion dialog to further imprve things.

<font size=-1>[ This Message was edited by: ilyons on 2001-11-03 19:34 ]</font>

[xander]

Its like Ian sais it has nothing to do with increasing the lamp brightness, you can just adjust the exposure (in EV's, Exposure Values, like "stops" on your camera) for the RGB channels together, or R,G or B seperate.

On the other hand this function is giving better results in Nikonscan 3 compared to Silverfast. I only use it on slides, never on negatives!

This is one of the reasons I prefer Nikonscan for scanning mainly "dark" underwaterslides above Silverfast.
Adjusting the Image Brightness will not do the job like the "Analog Gain" in Nikonscan.

Xander

[TG]

Hi Ian!
<p>Is there anything you don't know (about scanners) ?