Scanner Comparison 2019 [Epson Flatbed | Eversmart Flatbed | Drum Scanners]

[Pali K]

Reserve 10

[Pali K]

Epson 700 | SilverFast SE | IT8 Colortarget RAW

LINK TO FILE

[Pali K]

Epson 700 | SilverFast SE | USAF 1951 Resolution Target RAW

LINK TO FILE

Image below is cropped from a 6400 DPI scan but not resized. This is the best resolution my V700 can achieve. Vertical is ~2800 DPI and Horizontal is ~2200 DPI



Below are links to my "focus calibration" scans

Focus Setting 1
Focus Setting 2 **Best Focus**
Focus Setting 3
Focus Setting 5

[Tin Can]

Pali, great thread and you are the right person to do it.

I ask that you quantify your target charts. Such as 1951 USAF resolution test chart and how to use it. I use a letter sized download Laser printed and know I am doing it wrong. Several times I have asked for help with that on this forum.

I notice that https://www.edmundoptics.com/c/test-targets/1099/ sells many, some are very expensive and tiny.

I plan to buy this one as it's big and 'only' $50 shipped. https://www.edmundoptics.com/f/resol...r-chart/11903/

Also a great idea to 'reserve' linear posts so it gets recorded in one string. Genius!

[Pere Casals]

Epson 700 | SilverFast SE | USAF 1951 Resolution Target RAW
Image below is cropped from a 6400 DPI scan but not resized. This is the best resolution my V700 can achieve. Vertical is ~2800 DPI and Horizontal is ~2200 DPI

Pali, yes, this is consistent with all tests posted around, and my own tests. Thanks for making this test.

Think that 2800 effective dpi is amazing for a single pass covering 5.9", any expensive pre-press or pro scanner has to stitch strips to beat that. Sadly the poor vertical driving quality degradates the Y performance.

From scans of practical shots it would be interesting to find at what enlargement a drum makes a difference. My bet is 1.5m for 8x10 and 1m for 4x5.

Still for 8x10, with area guide it has a lower resolving power because the other lens takes the full bed, instead 5.9", it would be also interesting to measure that.

[Pali K]

Pali, great thread and you are the right person to do it.

I ask that you quantify your target charts. Such as 1951 USAF resolution test chart and how to use it. I use a letter sized download Laser printed and know I am doing it wrong. Several times I have asked for help with that on this forum.

I notice that https://www.edmundoptics.com/c/test-targets/1099/ sells many, some are very expensive and tiny.

I plan to buy this one as it's big and 'only' $50 shipped. https://www.edmundoptics.com/f/resol...r-chart/11903/

Also a great idea to 'reserve' linear posts so it gets recorded in one string. Genius!

Thank you Randy! Good thought on qualifying the resolution target which I will do so now.

Pali, yes, this is consistent with all tests posted around, and my own tests. Thanks for making this test.

Think that 2800 effective dpi is amazing for a single pass covering 5.9", any expensive pre-press or pro scanner has to stitch strips to beat that. Sadly the poor vertical driving quality degradates the Y performance.

From scans of practical shots it would be interesting to find at what enlargement a drum makes a difference. My bet is 1.5m for 8x10 and 1m for 4x5.

Still for 8x10, with area guide it has a lower resolving power because the other lens takes the full bed, instead 5.9", it would be also interesting to measure that.

Thanks Pere! Yes, I plan to post everything here step by step and will consolidate everything in the first 10 posts when all said and done.

[Ted Baker]

Pali,

Have you considered doing a slanted edge test? You can a razor blade at 5degrees for the flat beds, but you may need to create a suitable target for the drums. For the color negative what are you planning on using?

[Corran]

Good going Pali.

[Peter De Smidt]

Great job, Pali. I look forward to more of your results!

[Pere Casals]

Vertical is ~2800 DPI and Horizontal is ~2200 DPI

Pali, just I checked the calculations, in the vertitical bars we can see element 5.6 clearly. This is 57.0*25.4*2 = 2895.6, so it's way better rounded to 2900dpi.

With Hor bars (vert axis) we see 5.4 at least, this is nailing 2300 dpi. Always there is a subjective factor for the 1951, and important thing is having a uniform criteron, but to me a fair reading would be 2900x2300, in special the 2900 reading is clear to me.