LensRentals’ Roger Cicala has published an interesting article comparing 24-70mm F2.8 lenses from Canon, Nikon and Tamron, using both an optical test bench and Imatest results from Canon EOS 5D Mark III and Nikon D800E bodies. This provides some insights about the interaction between the sharpness of the lens and resolution of the camera’s sensor, and under what practical circumstances you might see any difference. It’s worth reading for anyone interested in the long-running question: what provides more detail, a higher resolution sensor with a good lens, or a lower resolution sensor with a great lens?
Lensrentals’ Roger Cicala hasn’t always been a fan of Sigma’s lenses but the company’s latest 35mm F1.4 seems to have got him pretty excited. He’s written a very positive first impressions blog post, considering the build and test data from the first sample he’s received. As usual, he’s very careful to stress the limitations of what he’s reporting – specifically that these are early impressions, based on a single lens that he’s had little chance to actually take photos with. However, he’s also someone with immense experience with lenses, and is in the unusual position of having had the opportunity to strip the lens down, so we found his insight interesting. (From Lensrentals)
Lensrentals’ Roger Cicala has published the third part of his investigation into Canon’s autofocus systems, looking at what’s changed behind the marketing claims. It’s not unusual for manufacturers to promise that their products are ‘new and improved,’ but explanations about what’s been changed or how much of an improvement it offers are harder to come by. Cicala has delved into Canon’s patents (and taken some lenses apart), to see exactly why the EOS 5D Mark III’s focus so consistently out-performs its predecessors’.
Roger Cicala of LensRentals has written an article about why ‘soft’ lenses occur and how you’ll know if you have one. The article summarises his experience and testing of the phenomenon and explains how the persuit of a ‘perfect’ lens is a fool’s errand.
Heres a virtual movie of an excerpt from the trial of the renowned human rights campaigner and Irish Nationalist Sir Roger Casement “The Speech from the Dock” that he made at his trial for “High Treason” on the 29th June 1916. Roger David Casement (Irish: Ruairí Mac Easmainn; 1 September 1864 — 3 August 1916), (Sir Roger Casement CMG between 1911 and his execution for treason in August 1916, when he was stripped of his British honours),was an Irish patriot, poet, revolutionary and nationalist. He was a British consul by profession, famous for his reports and activities against human rights abuses in the Congo and Peru, but better known for his dealings with Germany before Ireland’s Easter Rising in 1916. An Irish nationalist and Parnellite in his youth, he worked in Africa for commercial interests and latterly in the service of Britain. However, the Boer War and his consular investigation into atrocities in the Congo led Casement to anti-Imperialist and ultimately Irish Republican and separatist political opinions. Casement was born near Dublin, living in very early childhood at Doyle’s Cottage, Lawson Terrace, Sandycove His Protestant father, Captain Roger Casement of (The King’s Own) Regiment of Light Dragoons, was the son of a bankrupt Belfast shipping merchant (Hugh Casement) who later moved to Australia. Captain Casement served in the 1842 Afghan campaign. Casement’s mother Anne Jephson of Dublin (whose origins are obscure) had him rebaptised secretly as a Roman …
Heres a virtual movie of the great American poetesss Emily Dickinson (1830 – 1886) reading her poem numbered 1760 “Elysium is as far as to” The manuscript of this poem can be dated to around 1858. In Greek Mythology, Elysium is the home of the blessed in the afterlife Originally in Greek mythology, beautiful meadows or plains, or islands of the blest, located in the far west by the banks of Ocean. There certain heroes of the fourth race who never experienced death were said to dwell in perfect happiness ruled by Rhadamanthus. The titans after being reconciled with Zeus also lived there under the rule of Kronos. Pindar holds that all who have passed blamelessly through life three times live there in bliss. … Emily Elizabeth Dickinson (December 10, 1830 — May 15, 1886) was an American poet. Born in Amherst, Massachusetts, to a successful family with strong community ties, she lived a mostly introverted and reclusive life. After she studied at the Amherst Academy for seven years in her youth, she spent a short time at Mount Holyoke Female Seminary before returning to her family’s house in Amherst. Thought of as an eccentric by the locals, she became known for her penchant for white clothing and her reluctance to greet guests or, later in life, even leave her room. Most of her friendships were therefore carried out by correspondence. Although Dickinson was a prolific private poet, fewer than a dozen of her nearly eighteen hundred poems were published during her lifetime.[2 …
