
The Olympus system of digital single-lens reflex (SLR) bodies and lenses was a clean sheet of paper design, introduced in 2003. Olympus and Kodak asked the following questions:
Their answers were "No, no, and here is the Four Thirds system of cameras and lenses designed around a 13x17mm sensor." The result is the world's most compact camera system capable of professional results. The Olympus system should be seriously considered by photographers specializing in travel or those whose shoulders are aching. Note that the aspect ratio is 4:3 rather than the 3:2 of 35mm film and most digital cameras. The 4:3 aspect ratio is closer to old standard paper sizes, such as 8x10, 11x14, and 16x20, and older film formats, such as the 4x5 view camera. It is probably a better aspect ratio for portraits and not as good for landscape.
The Four Thirds system included a design for a brand-new lens mount. Functionally this is very similar to the Canon EOS lens mount, introduced in 1987, with an all-electronic interface between camera and lens. The mount diameter, however, was reduced from Canon's 54mm to about 44mm, similar to the Nikon F-mount. A 44mm on a film camera is a bit tight, but the dimension is vast compared to the size of the image circle for a Four Thirds sensor and therefore provides lens designers with a lot of flexibility. When looking at Four Thirds lenses, multiply by 2 to determine the 35mm equivalent in angle of view, e.g., a 14-42mm zoom lens for an E-system body will work the same as a 28-84mm lens on a 35mm film camera.
If you are new to photography, start with the photo.net article "Building a Digital SLR System."
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Michelangelo the painter: AD 1504-1550
Michelangelo's reputation as a painter derives, almost entirely, from his work in one building - the Sistine chapel. A few panel paintings possibly survive from his hand from the period 1495-1508, though only one of them is accepted by scholars beyond any doubt. This is the circular Virgin and Child commissioned by Angelo Doni in about 1504, now in the Uffizi. Two panel paintings in the National Gallery in London have long been attributed to Michelangelo by some and rejected by others.
At the end of his life there are frescoes for another Vatican building, the Pauline chapel, which Michelangelo completes in 1550. But all the rest of his painting is done in two creative bursts - on the ceiling of the Sistine chapel (1508-12) and on the wall above the altar (1536-41).
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Piero della Francesca: AD 1445-1460
A religious fraternity in Sansepolcro, near Arezzo, requires a new altarpiece. In January 1445 the members commission it from a young man in his late twenties, who has been away in Florence for the past few years learning his craft but who is now back in his small provincial home town.
The painter is Piero della Francesca. He spends much of his working life in Sansepolcro and in Arezzo, far from the main artistic centres, which to some extent explains why his name is largely forgotten for several centuries after his death. Another reason may be the profound calm of his work, unfashionable in periods when art has tended more to the dramatic gesture. He is now recognized as one of the great masters of the Italian Renaissance.
While in Florence, the young Piero has clearly seen Masaccio's frescoes. His first altarpiece at Sansepolcro is old-fashioned in concept, with a gilded background, but the figures already achieve the rounded solidity pioneered in the frescoes of the Brancacci chapel.
From this beginning, within a few years, Piero evolves his own characteristic and inimitable style. It is visible in the famous Baptism of Christ, probably painted as an altarpiece in Sansepolcro in the early 1450s. The figures stand with monumental stillness, bathed in a cool light of seemingly eternal clarity. This is Renaissance humanism in its broadest sense, allowing full weight to the dignity of man.
The stillness, the sense of a scene perfectly positioned in space, the use of patches of almost pure colour to suggest a harmony of pattern and order - all these are characteristics of Piero's timeless art. They can be seen at their best in the fresco cycle on the Legend of the True Cross, which he paints in the church of St Francis in Arezzo in the years around 1460.
Underpinning the calm certainty of Piero's created world is a fascination with theories of form and perspective, very characteristic of the Italian Renaissance. Piero is the author of two learned treatises on the mathematics of pictorial illusion.
Botticelli: AD 1478-1482
If Piero's work offers the mystery of stillness, Botticelli introduces mystery of another kind - mysterious content, expressed in a restlessly sinuous line. From about 1470 Botticelli is established as one of the leading painters of Florence, frequently working for the Medici.
His characteristic style is seen in two of the best loved and most widely recognized paintings of the Renaissance. The Birth of Venus (c.1482) is a traditional subject (in classical mythology the goddess is born from the foam of the sea and floats ashore in a scallop shell). But Botticelli's tall nude and her attendant winds are a strikingly original way of depicting the scene.
In Primavera (Spring, c.1478) the scene itself is profoundly mysterious. In a grove of oranges the three Graces dance, while Flora scatters flowers upon the ground. She wears an exquisitely embroidered floral dress and is attended by a woman with a plant growing vigorously from her mouth. This woman, in her turn, is seized by a man in flight.
These figures depict a scene in Ovid. Zephyr (the west wind) grasps his bride Chloris (the goddess of flowers), whereupon blooms sprout from her lips and she is transformed into the fully developed Flora, strewing spring flowers upon the ground.
These two paintings, imbued with classical allusion, are believed to contain themes of special significance to the Neo-Platonists of Florence's Platonic Academy. It is even possible that their content is devised by the academy's director, Marsilio Ficino. Primavera also conceals within its imagery several hints of the names Medici and Lorenzo.
Both works are commissioned for his private villa by Lorenzo di Pierfrancesco de' Medici, a cousin of Lorenzo the Magnificent. They suggest very well the rarefied nature of Renaissance Florence in the late 15th century - an atmosphere about to be brutally interrupted by the more strident certainties of Savonarola.
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Fra Angelico and San Marco: AD 1443-1447
The Dominican order has among its ranks a superbly talented painter. As a friar he is referred to as 'brother' (frater in Latin, fratello in Italian), and the name by which he becomes known is Fra Angelico - the angelic brother.
From 1443 Dominicans in Florence employ him to provide contemplative images for the walls of their convent of San Marco. Over the next four years he and his assistants create an extended masterpiece of Italian Renaissance art - though they would not have thought of it in those terms.
There are large frescoes in the cloisters and in the public areas of the convent (mainly by Fra Angelico), and forty-four smaller scenes from the Gospel story in the cells of the friars (many of them painted by his assistants). But the master's style - clear colours, strong design, a sense of depth and light learnt from the example of Masaccio - is one which the pupils can adopt with a fair measure of success.
The result is a building whose interior, as intended, is marvellously conducive to a sense of wonder and contemplation - certainly for the friars for whom the images were painted, and almost as much among today's tourists.