Epson Perfection V800 adjusting for as much as sharpness as possible

[neildw]

Hi guys,

I am re-scanning my images and I know you can adjust the height of the filmholder because the scanner's factory standards can be a little of.

So, I have scanned an image with the filmholder on it's lowest, midlle and highest point....

But I don't see any difference in any way?

[neildw]

https://live.staticflickr.com/65535/50460866228_f71c7c628e_b.jpg (https://flic.kr/p/2jT48uY)Schermafbeelding 2020-10-12 om 17.31.15 (https://flic.kr/p/2jT48uY) by Smith De Westelinck (https://www.flickr.com/photos/131227436@N06/), on Flickr

These are the results.

[Alan Klein]

I saw the difference on my V850. It was obvious. Did you scan without sharpening?

[Mick Fagan]

I have the same scanner and I too haven't been able to detect any difference between the different height settings. I don't scan that much and I only scan B&W negative film, but the sharpness of the images I get are wonderful; but I have wondered about the height thing for some time.

I've only ever scanned 4x5" film.

Mick.

[neildw]

I saw the difference on my V850. It was obvious. Did you scan without sharpening?

I believe I did, indeed, scan without sharpening because I rather have the control myself.
Is it possible because I scanned the two adjusted filmholders, without préscanning again?
That couldn't be it, could it? That for seeing the difference I have to préscan again instead of just scan?

edit:

Also I must say this is a very big close-up of this image. So maybe I'm trying to find a better sharpness that just is not possible? But still, I would see some difference, wouldn't I?

[Ari]

For what it's worth, I find your third scan to be less sharp than the first two. At least it shows that way on my monitor.

[Alan Klein]

I believe I did, indeed, scan without sharpening because I rather have the control myself.
Is it possible because I scanned the two adjusted filmholders, without préscanning again?
That couldn't be it, could it? That for seeing the difference I have to préscan again instead of just scan?

edit:

Also I must say this is a very big close-up of this image. So maybe I'm trying to find a better sharpness that just is not possible? But still, I would see some difference, wouldn't I?

The best setting is different for each of my two 4x5 holders. One was in the center. The other was in between the center and the lowests setting. MAke sure all four sliders are in the saem position for each scan.

I did a full scan of the same chrome shot without sharpening on each of the five heights for each holder. Then I marked the best position on each holder with a marker which had the best focus since the sliders can move out of position.

Double check that the focus is not checked. For some reason Epsonscan always seems to check that box automatically before the scan. Save the scans as tiffs not jpegs. I use 2400 bit scan at 48 bit color.

You only need to do the test once. So it's worth taking the time.

[neildw]

The best setting is different for each of my two 4x5 holders. One was in the center. The other was in between the center and the lowests setting. MAke sure all four sliders are in the saem position for each scan.

I did a full scan of the same chrome shot without sharpening on each of the five heights for each holder. Then I marked the best position on each holder with a marker which had the best focus since the sliders can move out of position.

Double check that the focus is not checked. For some reason Epsonscan always seems to check that box automatically before the scan. Save the scans as tiffs not jpegs. I use 2400 bit scan at 48 bit color.

You only need to do the test once. So it's worth taking the time.


I don't understand about the focus you mention? Are you talking about an autofocus? Because I believe V800 had not such a thing? As mentioned by others. Not by own experience.

I did a scan on the 3 (not5) markers. Could the difference be so marginal that one of the remaining markers makes the difference?

Thank you for responding.

[Alan Klein]

I don't understand about the focus you mention? Are you talking about an autofocus? Because I believe V800 had not such a thing? As mentioned by others. Not by own experience.

I did a scan on the 3 (not5) markers. Could the difference be so marginal that one of the remaining markers makes the difference?

Thank you for responding.

I'm sorry. I meant the Unsharp Mask check box, not Focus checkbox in Epsonscan.

It should have said :
Double verify that the Unsharp Mask is not checked. For some reason Epsonscan always seems to check that box automatically before the scan. Save the scans as tiffs not jpegs. I use 2400 bit scan at 48 bit color.

[neildw]

I'm sorry. I meant the Unsharp Mask check box, not Focus checkbox in Epsonscan.

It should have said :
Double verify that the Unsharp Mask is not checked. For some reason Epsonscan always seems to check that box automatically before the scan. Save the scans as tiffs not jpegs. I use 2400 bit scan at 48 bit color.

Little thing is that I do not use Epson Scan but have bought Silver Fast from the beginnen. :-)

[invisibleflash]

Thanks OP for the rundown. I wondered if there was a way to adjust for sharpness in scans. Too bad they can't do it in the software.

[Alan Klein]

Little thing is that I do not use Epson Scan but have bought Silver Fast from the beginnen. :-)

Is Silverfast sharpening the scans automatically? That may account for why they all look pretty similar. Is there a way to shut sharpening off?

[Steven Ruttenberg]

I scan at 6400dpi then do a 2x2 bin to 3200dpi to save as 48 bit rgb save negatives as linear raw tiff and positive film as positive.

I also wet mount using betterscanning kit. You will see biggest difference in wet mounting and a big dig difference in dpi setting. 2400 is to soft for me. If I could I would save all files scanned at 6400 dpi, but they have not finished big tiff format so that is iffy, plus files are big. Which is why I bin them.

I use Vuescan for everything.

On my drum scanner I scan and save at 4000dpi. Checking focus and aperture for each image
. File sizes are similar, but quality is greater than Epson.

I get the argument about max this and max that and no better than this or thst, but I have done actual testing and posted results finding that 6400 was indeed the best and settled on less, like 6000 till I discovered the 2x2 bin function afforded in Vuescan.

The above works for me hands down. Hour methods and mileage may vary.

I Al's believe in better to have as much info and not need it, than to need it and not have it.

[Alan Klein]

I scan at 6400dpi then do a 2x2 bin to 3200dpi to save as 48 bit rgb save negatives as linear raw tiff and positive film as positive.

I also wet mount using betterscanning kit. You will see biggest difference in wet mounting and a big dig difference in dpi setting. 2400 is to soft for me. If I could I would save all files scanned at 6400 dpi, but they have not finished big tiff format so that is iffy, plus files are big. Which is why I bin them.

I use Vuescan for everything.

On my drum scanner I scan and save at 4000dpi. Checking focus and aperture for each image
. File sizes are similar, but quality is greater than Epson.

I get the argument about max this and max that and no better than this or thst, but I have done actual testing and posted results finding that 6400 was indeed the best and settled on less, like 6000 till I discovered the 2x2 bin function afforded in Vuescan.

The above works for me hands down. Hour methods and mileage may vary.

I Al's believe in better to have as much info and not need it, than to need it and not have it.

Steven: How do you do your 2x2 bin from 6400 to 3200?

[neildw]

I scan at 6400dpi then do a 2x2 bin to 3200dpi to save as 48 bit rgb save negatives as linear raw tiff and positive film as positive.

I also wet mount using betterscanning kit. You will see biggest difference in wet mounting and a big dig difference in dpi setting. 2400 is to soft for me. If I could I would save all files scanned at 6400 dpi, but they have not finished big tiff format so that is iffy, plus files are big. Which is why I bin them.

I use Vuescan for everything.

On my drum scanner I scan and save at 4000dpi. Checking focus and aperture for each image
. File sizes are similar, but quality is greater than Epson.

I get the argument about max this and max that and no better than this or thst, but I have done actual testing and posted results finding that 6400 was indeed the best and settled on less, like 6000 till I discovered the 2x2 bin function afforded in Vuescan.

The above works for me hands down. Hour methods and mileage may vary.

I Al's believe in better to have as much info and not need it, than to need it and not have it.

70% of that explanation sounds like science to me. :-)

2X2 bin? What is that even?

[Tin Can]

https://www.swagastro.com/to-bin-or-not-to-bin.html



70% of that explanation sounds like science to me. :-)

2X2 bin? What is that even?

[Steven Ruttenberg]

It creates a "super" pixel by combiningb4 pixels into one. The final image then is reduced from 6400ppi to 3200ppi with resulting 3200ppi image having better everything than if scanned at 3200poi.

If you prefer 2400ppi for example, scan at 4800ppi and 2x2 bin. Final image will be much better than a native 2400ppi scan.

Also, Vuescan us only scan software I know that has thar feature.

[Steven Ruttenberg]

https://www.swagastro.com/to-bin-or-not-to-bin.html

Nice. I didn't know about that link. Excellent find.

[Alan Klein]

It creates a "super" pixel by combiningb4 pixels into one. The final image then is reduced from 6400ppi to 3200ppi with resulting 3200ppi image having better everything than if scanned at 3200poi.

If you prefer 2400ppi for example, scan at 4800ppi and 2x2 bin. Final image will be much better than a native 2400ppi scan.

Also, Vuescan us only scan software I know that has thar feature.

What method do you use to reduce it from 4800 to 2400?

[IanBarber]

I get the argument about max this and max that and no better than this or thst, but I have done actual testing and posted results finding that 6400 was indeed the best and settled on less, like 6000 till I discovered the 2x2 bin function afforded in Vuescan.

Steve, where in Vuescan are you seeing the option for 2x2 bin please