Michael Strickland is a fine art landscape photographer based out of his home state of Kansas. Michael creates all of his images on medium and large format film and aims to create peaceful images of the United States from the Kansas landscape to the California Big Sur seascape.
Resolution and acuity are two very common ways to assess technical quality of photographic images. Resolution refers to how much subject detail is retained in the image or print. Acuity refers to the sharpness of fine edges and lines.
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Large size prints demand the highest level of scanning resolution. Any lapse in quality will utterly destroy the feeling of a print needing a high sense of texture or subject clarity. But how much resolution is enough? Can you get by with a more affordable, small flatbed scanner or do you need to drum scan your negatives?
Second, the main difference between the drum scan and the flatbed scan appears to be due to the higher acuity possible in the drum scanner. All edges are just a bit sharper on the drum scan, giving the appearance of higher resolution, but in fact it is not. Acuity can be best enhanced by sharpening the image (but remember, excessive sharpening can also degrade resolution).
Indeed, a slight degree of sharpening to the V700 scan improves, but does not equal, the acuity of the drum scan. But it comes really, really close. The settings I used to sharpen the V700 image in Lightroom were Amt 91, Radius 2.0, Detail 33, and Masking 94. This is a small degree of sharpening on a 320 MP image.
The imaging drum is the heart of the laser printer or the copier. It transfers the print image, consisting of toner, onto the paper. An imaging drum is also called OPC, imaging unit or just drum by some manufacturers. A dirty or worn out drum reduces extremely the printing quality of a laser printer.
The drum is a 1 to 2 millimetre tube of strong aluminium, which is slightly longer (or wider, depending on how you look at it) than the maximum printing width. The imaging drum is electrically charged by means of focused LEDs, with a laser beam or via exposure projected by an objective.
The toner particles rotate on the toner roll and are attracted by the imaging drum and transferred onto the paper. There the toner particles are then fixed with the fixation unit (also called fuser) by means of heat and pressure. After the transfer onto the paper, the drum is discharged again via a discharge corona operated by alternating voltage and possible toner residues are removed by a wiper.
In the course of time, the coating of the imaging drum loses its photoelectric properties and suffers as a result of the mechanical strain, for instance due to contact with paper. Especially inferior paper which is particularly thin can leave residues on the imaging drum. Likewise, toner residues result in a badly printed image.
Provided that it is ensured that the drum is defective or worn-out, you can simply open the flap of the printer, since the toners can be found behind it. Depending on the device type or set-up, the drum can be found either behind the toner or like in the case of the Konica Minolta often also under the toners.
In this case, you must take special care of the particularities indicated by the device manufacturer when replacing the drum. In general it can be said though, that a lot of heat arises while printing and that after the last printing, time must elapse before the drum can be replaced.
When installing the new drum, even before unpacking it, you should make sure that the new drum can be put into the device as soon as possible, so that it is not unnecessarily exposed to any direct sunlight. Therefore you should check how to remove the old drum and whether the device has to be switched off to do so.
As mentioned before, in the case of smaller, more economical printers, the drum is included directly with the toner cartridge and needs no further attention. For larger or more professional devices, depending on the type, either one drum or one drum per colour (black, cyan, magenta and yellow) is required.
An imaging drum is an essential part in the operation of your modern laser printer. Along with the toner and roller, the imaging drum helps finalize the ink-to-paper process, receiving the image or text and then transferring it to paper. Otherwise known as a drum unit or photoreceptor assembly, it works much like the corresponding part in your office's photocopiers.
When an image or text is sent to the printer, after immediately being converted to digitized lines of colored or neutral dots, an electrostatic charge via a primary charge roller (or corona wire) is sent to the imaging drum. This electrostatic charge essentially contains the image or text to be printed. An alternating current is sent to the drum just before the new image or text is sent -- this current removes any residuals from previous images or text, but it does not effect the electrostatic charge.
With the image or text still held on the surface of the imaging drum, the printing process introduces toner and paper, creating an electrostatic attraction with parts of the drum. The paper also receives an electrostatic charge, thus ensuring the accuracy of the position as the image moves from the drum to the paper. The toner then singles out the parts of the drum that are not charged, and the final process of transferring image to paper starts.
With the toner and drum in sync, the printer guides paper over the drum via the roller, transferring the image instantaneously. Higher-end printers typically use positively-charged rollers on the back sides of the paper to help pull the negatively charged toner from the drum, adding more charge and another step to the process. Once the paper passes over the drum with the toner bonded, a radiant heat lamp located inside the roller activates, helping further bond toner to paper.
Generally speaking, if you want to grab sharp images of crazy fast movements such as molecular interactions or water droplets, you're going to need a super-expensive rig. Researchers have developed a system built using projector tech that could significantly cut the cost.
The freshwater drum is common in most Kansas rivers and reservoirs. Commonly considered an undesirable rough fish, the drum is predatory and will readily strike lures and baits. It is a good fighter and the white meat is fine table fare. The drum can make strange drumming or grunting noises with muscles vibrated against the swim bladder. The world record drum weighed 54 pounds, 8 ounces. The Kansas state record drum weighed 31 pounds, 4 ounces.
Ntan (en-tan) bands were popular among the Asante peoples of Ghana between 1920s and 1950s. They performed on occasions such as naming ceremonies, weddings, funerals and traditional festivals—any event where entertainment was needed. This is in contrast to other musical instruments and performances that were reserved for the court. The term ntan (meaning “bluff” in Twi) does not refer to the drum itself, but rather to the entire event that featured music and the display of carved figurative sculptures representing the chief, queen mother and members of the court. Reflecting the colonial presence of the times on the Gold Coast (present-day Ghana), the sculptural entourage also included figures of colonial officers.
Although the primary function of a drum is to make music, one can focus on its form as well. Looking at this drum, it is difficult to ignore the elaborately carved imagery or iconography. The relief images represent aspects of Akan culture and environment. This particular drum features an elephant -- a symbol of power among the Asante — as its support. All drums of the ntan bands are characterized by breasts, which are typically found in the center of the drum and objectify the idea of the drum as “the mother of the group.” Most ntan drums also depict a heart between or above the breasts, which recalls the phrase “be patient” (nya akoma) because all Ntan members should have a motherly heart.
Additional images on the drum that are not visible in the poster include:
Snake biting the frog: “Every part of the frog belongs to the cobra.” Everything the frog does eventually benefits the cobra that eats him. If applied to the performances it could mean that every musician works for the music association.
Akan stool: The Asante believe the stool is the seat or the soul of the Asante peoples.
Snake biting the hornbill: “By waiting patiently at one spot on the ground, the puff adder was able to catch the hornbill for lunch.” With ingenuity and patience, one can do the impossible.
Long-horned antelope: “Had I known is always last,” which refers to the futility of hindsight.
Cocoa tree: Indicates that many Ntan members are farmers; it is also symbol of wealth.Osei Bonsu, the ArtistOsei Bonsu was a famous and prolific sculptor who carved nearly all ntan drums and sculptures used throughout the Asante region. Bonsu was born in Kumase on October 22, 1900. His father was a drummer and a carver, and Bonsu was introduced to both at a young age. When he was in his teens, several chiefs from many parts of the Gold Coast (present-day Ghana) commissioned works from him. These works were highly mature for so young a sculptor. Beginning in 1920, Bonsu, his older brother and his father were hired by the British anthropologist Captain R. S. Rattray as his interpreters for Akan cultural matters and traveled with him throughout many parts of Asante land. In 1924, when Bonsu’s father and brother journeyed to England for the British Empire Exhibition, Bonsu remained home and continued to receive many important commissions from chiefs throughout the region. He taught carving at several colonial schools between 1933 and 1956, continuing to carve for the court during that time. e24fc04721
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