Betterscan variable height AN glass holder, which one for Epson 2450? 1mm or 0.5mm?

[Loris Medici]

I've given up the idea of purchasing an Epson V700 (it's still obtainable new in my part of the world, but with a relatively high price tag of USD 900) and decided to improve what I'm getting from my good old Epson 2450.

The purpose is scanning 6x7 MF film, target output dpi = 240/300 (depending on image; lower figure for images with low detail/smooth tones, higher figure for images with high detail/texture...) and target enlargement factor = something like 5-6x.

Question 1: Is 2540 able to match above criteria?

If yes,

Question 2: Film is prone to sag with Epson's OEM MF film holder, I expect that using a Betterscan variable height AN glass holder will improve much the quality of the scans I'm able to get from the 2450. Is that a realistic expectation?

If yes,

Question 3: Which holder thickness should I choose? 1mm (same as OEM holders) or 0.5mm (more play in negative height but much less sturdy)? What is your experience with this scanner? Do you find that you need to decrease the film's height for better scan resolution, or increase it? (That's critical and will help me in choosing the right holder.) Or, does that depend on the particular scanner? (Which means I have to definitely test it myself...)

Question 4: AN glass is effective only when film is scanned emulsion down. (Film curl is always towards emulsion side.) Do you experience any problems when scanning *B&W* negatives emulsion down? (I think Epson's suggestion to do the opposite is to eliminate the differentiated gloss of the emulsion side.) Please note that I will be scanning pyrocatechin stained B&W film...

Thanks in advance,
Loris.

[sanking]

I've given up the idea of purchasing an Epson V700 (it's still obtainable new in my part of the world, but with a relatively high price tag of USD 900) and decided to improve what I'm getting from my good old Epson 2450.

The purpose is scanning 6x7 MF film, target output dpi = 240/300 (depending on image; lower figure for images with low detail/smooth tones, higher figure for images with high detail/texture...) and target enlargement factor = something like 5-6x.

Question 1: Is 2540 able to match above criteria?

If yes,

Question 2: Film is prone to sag with Epson's OEM MF film holder, I expect that using a Betterscan variable height AN glass holder will improve much the quality of the scans I'm able to get from the 2450. Is that a realistic expectation?

If yes,

Question 3: Which holder thickness should I choose? 1mm (same as OEM holders) or 0.5mm (more play in negative height but much less sturdy)? What is your experience with this scanner? Do you find that you need to decrease the film's height for better scan resolution, or increase it? (That's critical and will help me in choosing the right holder.) Or, does that depend on the particular scanner? (Which means I have to definitely test it myself...)

Question 4: AN glass is effective only when film is scanned emulsion down. (Film curl is always towards emulsion side.) Do you experience any problems when scanning *B&W* negatives emulsion down? (I think Epson's suggestion to do the opposite is to eliminate the differentiated gloss of the emulsion side.) Please note that I will be scanning pyrocatechin stained B&W film...

Thanks in advance,
Loris.

Loris,

Is ordering directly from Epson out of the question? One can buy the Epson V700 directly from Epson for $415 USD, delivered, in the US.

Regrding the 2450, if scanning MF film I think the Epson film holders should be fine as they hold the film ok without much sagging. My experience with the 2450 was that the best plane of focus ranged from about .05mm to 1.0mm above the glass of the scanner.

In addition to the Better Scnning holders another option is the one described by Jeremy Moore in a thread on the LF forum.

"Take a piece of glass and wetmount your negative to it or take a piece of anti-newton glass and tape your negative to it. Put this piece of glass (side with negative facing down) on the scanner with a thin washer in each corner holding it up off the glass.

Make a scan of a small section at hi-res (or a target with lots of detail) and evaluate the result.

Add a washer to each corner (the glass is now supported by 2 washers stacked together in each of the 4 corners). Scan again. Compare to the previous scan. If it's sharper add another washer and scan again. Repeat until adding a washer makes your scan less sharp. At that point remove 1 washer from each corner and you have a good height for scanning on your scanner.

Of course, washers are cheap and readily available, but you could also do it with coins or anything else you want like typing paper.."

Sandy

[Loris Medici]

Thanks Sandy,

I can't buy from Epson US; the import operation fee alone would be something like USD 300! (Not counting shipment cost and 18% VAT which I'm also subject to...)

I experience some sagging but not sure how much that affects my results since I haven't tested extensively...

I won't be wet mounting but will definitely test the focus field using a similar methodology. Thanks for mentioning that bit of info.

BTW, my methodology would be as following (describing it because it seems like a faster/easier procedure, therefore useful for others in the future):

- Cut 2" (~5cm) portion of a cheap plastic ruler
- Put a spacer object with a height of 5mm onto the scanner bed
- Place the ruler on the spacer and scanner bed simultaneously, so that it forms a right triangle
- Scan and see which mm markers (min and max) are sharp
- Do the necessary trigonometric calculations to determine the depth of focus

(I may add a target with more detail - such as high dpi imagesetter film - to the system, in case the mm markers aren't enough to determine fine sharpness differences...)

Regards,
Loris.

Loris,

Is ordering directly from Epson out of the question? One can buy the Epson V700 directly from Epson for $415 USD, delivered, in the US.

Regrding the 2450, if scanning MF film I think the Epson film holders should be fine as they hold the film ok without much sagging. My experience with the 2450 was that the best plane of focus ranged from about .05mm to 1.0mm above the glass of the scanner.

In addition to the Better Scnning holders another option is the one described by Jeremy Moore in a thread on the LF forum.

"Take a piece of glass and wetmount your negative to it or take a piece of anti-newton glass and tape your negative to it. Put this piece of glass (side with negative facing down) on the scanner with a thin washer in each corner holding it up off the glass.

Make a scan of a small section at hi-res (or a target with lots of detail) and evaluate the result.

Add a washer to each corner (the glass is now supported by 2 washers stacked together in each of the 4 corners). Scan again. Compare to the previous scan. If it's sharper add another washer and scan again. Repeat until adding a washer makes your scan less sharp. At that point remove 1 washer from each corner and you have a good height for scanning on your scanner.

Of course, washers are cheap and readily available, but you could also do it with coins or anything else you want like typing paper.."

Sandy

[Don Bryant]

Thanks Sandy,

I can't buy from Epson US; the import operation fee alone would be something like USD 300! (Not counting shipment cost and 18% VAT which I'm also subject to...)

I experience some sagging but not sure how much that affects my results since I haven't tested extensively...

I won't be wet mounting but will definitely test the focus field using a similar methodology. Thanks for mentioning that bit of info.

BTW, my methodology would be as following (describing it because it seems like a faster/easier procedure, therefore useful for others in the future):

- Cut 2" (~5cm) portion of a cheap plastic ruler
- Put a spacer object with a height of 5mm onto the scanner bed
- Place the ruler on the spacer and scanner bed simultaneously, so that it forms a right triangle
- Scan and see which mm markers (min and max) are sharp
- Do the necessary trigonometric calculations to determine the depth of focus

(I may add a target with more detail - such as high dpi imagesetter film - to the system, in case the mm markers aren't enough to determine fine sharpness differences...)

Regards,
Loris.

Loris,

The Betterscanning solution works so good it seems to me to be a worth while purchase rather than trying to implement a solution at home.

Don

[Doug Fisher]

>>Is that a realistic expectation?<<

Yes, especially if you have limp film. You can always use the taping technique to get it really flat if inverting the film does not work.

>>Which holder thickness should I choose?<<

Most people need the 1 mm. It is very rare that .5 mm is needed but as you can see from Sandy's comment there are a few who could use it.

>>(more play in negative height but much less sturdy)? <<

It still is sturdy but if you don't need .5 mm I rather you go with the 1 mm because I like to use more solid materials whenever possible. Using the glass, it doesn't matter as much now like it did with the T-locks but I still like to build as sturdy as possible.

>> Or, does that depend on the particular scanner? <<

Yes. Very much so. There can be quite a bit of variation in the focus point from scanner to scanner. Especially with the 2450.

>>(Which means I have to definitely test it myself...)<<

Exactly.

Doug

[Loris Medici]

Hi Don,

That method is for determining the focus depth/plane of my scanner. I should determine that first, in order to be sure that the 1mm version will do the job. If best focus is achieved at say ... 0.7mm, then I won't be able to get the most of my scanner with the 1mm holder.

Will definitely order one as soon as I determine my scanners ideal film plane height...

Regards,
Loris.

Loris,

The Betterscanning solution works so good it seems to me to be a worth while purchase rather than trying to implement a solution at home.

Don

[Ivan]

i agreed with loris

[Samuel]

Hi All fellows,
I found a bunch of spam coming from a single ip address and about 6 accounts, this has now been blocked. The spammers were also trying to be covert and use private messaging. I have setup the system so new members need 10 posts under their belt before they can send a PM. This will stop spam PM much faster since they'll be forced to spam in the forums instead.
Thanks

[Tony-S]

The Betterscanning solution works so good it seems to me to be a worth while purchase rather than trying to implement a solution at home.

I think I'd like to try that solution, but unfortunately his website is uber-confusing. Any idea what to get for the Epson v500? I think it would be the variable height unit (1mm or 0.5mm???) and anti-Newton ring glass? Does this only do MF (I shoot 6x7 and 35mm)?

[Don Bryant]

I think I'd like to try that solution, but unfortunately his website is uber-confusing. Any idea what to get for the Epson v500? I think it would be the variable height unit (1mm or 0.5mm???) and anti-Newton ring glass? Does this only do MF (I shoot 6x7 and 35mm)?

Tony,

It's been a while since I've last visited the better scanning website. Rather than try to answer your question which I'm not qualified to do because of my ignorance of their product line (I'm not a V-500 user) I would suggest shooting an e-mail to the better scanning group and asking them directly.

I think in a lot of ways their products are very similar but there are differences from scanner to scanner which makes the holder geometry unique.

Don