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Drum scanning

Drum scanning

In the era of digital cameras analogue photography is mainly used by artists, hobbyists and specialists. For these three groups the image quality is one of greatest importance. Analogue transparencies processed into digital form must be as similar as possible to real positives/negatives in terms of color, tonal gradation and information in highlights and shadows. The most suitable devices for this task are drum scanners. This technology has been known for years and so far this is the best way of digitalization of photographic film. Below You can read about differences between devices and capabilities of this equipment.
Scan quality

Quality

Quality = perfect scan, but what does it mean? In most cases the quality is associated with sharpness of picture in big enlargement - big resolution/number of megapixels. But this isn't the only aspect of the scan, which everyone should pay attention to. Most of the characteristics showing the difference between scans were described below with examples.
Resolution

Resolution

According to the manufacturer our device can scan transparent materials up to 11000 dpi, however our tests show that the real resolution is about 5500 dpi. It's sufficient to scan all included in the film details without excessive enhancement of film grain. This gives picture of nearly 15000 x 12000 pixels from 6x7 frame which could be printed in 105 x 85 cm (360 dpi print quality - the native resolution of Epson printers). Of course film grain, sharpness of the lens and way of recording image have very large impact on the quality of the developed film, and at the same time on the scan and final print.
Resolution comparison - full image
Full image (6x7 frame) and 100% crop,
buttons below picture let you compare resolution:
  • drumscan 5500 dpi - without modifications
  • drumscan 5500 dpi - sharpened (UM 300%) and denoised (NR 3/30/30)
  • scan from Epson V750 6400 dpi scaled down to 5500 dpi without modifications
  • scan from Epson V750 6400 dpi scaled down to 5500 dpi sharpened automatically by Epson Scan software
Resolution comparison - detail - PRIMESCAN
preloading preloading preloading drumscan
no modification
drumscan
sharpened+denoised
Epson V750
no modification
Epson V750
sharpened
Sharpness

Sharpness

Positive and negative materials are always wetmounted on the drum using dedicated KAMI fluids and Aztek polycarbonate overlays. This solution provides perfect film flatness and focus over the entire surface of the frame. Mounted negatives
Scratches, dust and other dirt

Scratches, dust and other dirt

An additional advantage of wet mounting is elimination of most scratches and dirt of scanned film. These defects of course do not magically disappear under the influence of fluid, but are much less visible and finally we get better picture.
Colors

Colors

Applied profiling helps us get accurate color while scanning positive materials. We use IT8 targets made on the slides with very high dynamics which allows good calibration of highlights and shadows. Additionally, they are manually measured which increases the accuracy of colors.
Noise and shadows

Noise and shadows

Amazing accuracy of the PMT can achieve very good signal to noise ratio. This means we can pull out a lot of useful information from dark areas of picture without enhancing the noise of the scanner. Additionally 12 bit logarithmic sampling (which results in a 16 bit output file) provides a sufficient amount of color information to bring details back. Very low image noise also allows for considerable sharpening of the scanned image without losing its quality (image is clear of artifacts from the ICE technology and banding of the flatbed scanner).
Shadow recovery comparison - full image
Full image (6x7 frame) and crop,
buttons below crop let You compare shadow recovery:
  • drumscan - without modifications
  • drumscan - with recovered shadows
  • scan from Epson V750 - without modifications
  • scan from Epson V750 - with recovered shadows
Shadow recovery comparison - detail - PRIMESCAN
preloading preloading preloading drumscan
no modification
drumscan
recovered shadows
Epson V750
no modification
Epson V750
recovered shadows
Underexposed positives

Underexposed positives

Sometimes good exposure is not possible and transparency will turn out underexposed. We can correct this by strengthening power of the backlight which greatly improves the image quality and allows to scan even very dark frames.
Lamp power comparison - default
Default light source power
Lamp power comparison - strengthened lighting
Strengthened lighting
Flare effect

Flare effect

The phenomenon of flare occurs when the currently scanned dark parts of the film are affected by neighboring bright surfaces. This results in shine / glow effect of bright elements. It's caused by scattering of light and its impact on adjacent pixels. In an ideal scanner the light should illuminate only one actually scanned pixel, so that each pixel could be read independently. The difference in brightness does not have to be large to lower image quality (it results in lower contrast and disappearing details). The presence of this unwanted effect depends on the construction of the scanning device and its quality.
Flare effect - full image
Full image from drumscanner
Porównanie efekt flary
preloading
Crop (move mouse over image to see scan from Epson v750)
Plik wyjściowy i postprocessing

Output file and postprocessing

Our work results in 16 bit TIFF image with Adobe RGB profile without any corrections (sharpening or color changes beyond the profiling positive materials).
In addition we offer "junk" removal, which will not be eliminated by the scanning fluid. Postprocessing price depends on the amount of effort that we need to put into photo retouching and it's determined individually.
Samples from drumscan

Samples from drumscan

Scans were taken at 5500 dpi without sharpening or edition (no dust removal, correction levels, etc.). Slides were profiled by IT8 target. Negatives were reversed using SilverFast HDR software. All files have been converted to JPG format (quality = 10) with sRGB profile.

Download sample photos from medium format - 6x7:
Skan bębnowy średni format 6x7 - 5500 dpi
Full size image: no modifications / sharpened
Velvia 100
Skan bębnowy średni format 6x7 - 5500 dpi
Full size image: no modifications / sharpened
Velvia 100
Skan bębnowy średni format 6x7 - 5500 dpi
Full size image: no modifications / sharpened
Velvia 100
Download sample photos from small format - 35 mm:
Skan bębnowy 35mm - 5500 dpi
Full size image: no modifications / sharpened
Velvia 50
Skan bębnowy 35mm - 5500 dpi
Full size image: no modifications / sharpened
Velvia 100
Skan bębnowy 35mm - 5500 dpi
Full size image: no modifications / sharpened
Profia 100F
Od czego zależy ogólna jakość skanu

What determines the overall quality of the scan

The condition and the quality of supplied materials have direct impact on the quality of scans. Certainly the wetmount scanning solution eliminates lot of problems related to dirt and scratches but it's not magic that will remove any damage. Extensively scratched, dirty, creased films have a small chance to be scanned perfectly. A film in better condition will be scanned better. The sharpness of elements in the picture corresponds to the camera optics and process of creating the images (wind, using a tripod, shutter speed, etc.).
Why us?

Why us?

Shortly about my photographic journey...

My adventure with analogue cameras began fairly recently - in 2014, when my friend said that the pictures look good only on a film. Having carefully considered the advantages and disadvantages of the analogue technique I realized that I should give it a try. I was mainly interested in colors, their separation and the ability to create large prints, which give 6x7 slides. Because of these reasons I choose a medium format camera Bronica GS1. Soon after I bought the first scanner - Epson V750. Highly praised flatbed scanner, which according to some (or many) opinions represents the quality of dedicated scanners and even a drumscanners. After many hours of fighting with the device I was able to get good results with the help of additional glass panes, scanner profiling and careful cleaning transparencies before scanning. Everything would be perfect but my friend (mentioned before) said that the quality of the scans would be good only after drum scanning (something like the holy grail of scanning). A few months later, I became a proud owner of a scanner Scanmate 4000. The quality of the scans - despite many disadvantages - left behind Epson V750. Unfortunately its age, color casts, jitter (wow and flutter) and noise in the shadows brought me to the limits of mental toughness. I gave up scanning and devoted more time to taking pictures. In the meantime I was searching for another scanning machine. Currently I have Heidelberg Primescan D8200, which pulls almost everything what is possible from every frame.
Do you want to scan your materials as best as possible?

Do you want to scan your materials as best as possible?

If yes - this is the right place. Because of that reason I started offering my services. Make a perfect scan once and never come back to scanned frames.
Concerned about your transparencies? Do not be!

Concerned about your transparencies? Don't be!

We reduce to minimum physical contact with the film. If the material quality allows, it's not cleaned mechanically in any way (it's only air blowed to take out dust particles from the surfrace). Slides and negatives are mounted using professional KAMI fluid. According to the manufacturer the fluid does not leave any substances on the surface of the transparencies and evaporates in 100% (after scanning can be visible some residue, which was collected from the surface and didn't evenly space after fluid evaporation).
Distribution and copyright

Distribution and copyright

We make sure that your photos do not go into the wrong hands without your permission. If you wish files can be encrypted.
Our drumscanner

Our drumscanner

Heidelberg Primescan D8200

Legendary Heidelberg Primescan D8200 handled by the best software - LaserSoft SilverFast.
A few facts from manufacturer:
Check out samples in „quality” section.
Offer

Offer

What, how and for how much?

We provide only the highest quality scans - 16 bit uncompressed TIFF files. Counting the price for each MB does not make sense here, so we present the overall price for the frames.
Positives and negatives scans in the following formats:

How do we cooperate?

Kontakt klienta
Contact, determination of the amount of material to be scanned
Wysyłka materiałów
Sending materials by mail / courier
Ocena materiałów
Evaluation of the quality of frames for scanning (contact with the customer if necessary)
Skanowanie
Scanning
materials*
Płatność
Payment
(PayPal)
Odesłanie materiałów
Sending back
originals by post and upload scans to FTP**

*When scanning negatives we send samples of reversed frames via e-mail or FTP server to the client's approval.
**Scans may be sent on a disc with the original materials or uploaded on our FTP server.
Test scan

Test scan

If you would like to check quality of our services, we propose making a test scan of a frame which you send to us (35mm or medium format) free of charge*.

* Customer covers the shipping cost.
Contact

Contact

If You are looking here, that means my services interested you.
If you have questions or something is not clear do not hesitate to contact me:
Our office is located in Poland.

Best regards,
Wojciech Dąbrowski

Gallery

www.koloryslajdu.pl

Check out also my gallery. At this moment only in Polish but no words are needed for photography!

KolorySlajdu.pl - zdjęcia kolorowe KolorySlajdu.pl - zdjęcia czarno-białe
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