Unlike less expensive models such as the D40, D60, D3000 and D5000, the D90 has a high resolution rear LCD screen, as well as a built in autofocus motor, which means that all Nikon F-mount autofocus-lenses (except the two for the rare Nikon F3AF) can be used in autofocus mode.[6]
The Nikon D90 was the first Nikon camera to include a third firmware module, labeled "L," which provides an updateable lens distance integration database that improves autoexposure functions.[7] [8]

Nikon D90 was introduced as the first ever DSLR with video capabilities, being able to record HD 720p videos with monaural sound. Of note about the video recording feature is that the D90 does not auto-focus while filming video, even when an auto-focus lens is used. In order to keep a subject in focus while it moves relative to the focal plane, the user must manually adjust the focus. As with other DSLRs, its CMOS sensor captures video frames using a method called rolling shutter, which may cause skewing artifacts during rapid camera or subject motion.
According to the Internet Movie Database,[9] the first use of the Nikon D90 to shoot a feature film has been a motion picture entitled Reverie. The film's cinematographer has praised the camera for its dynamic range, its ability to support 35mm optics, and large chip in comparison to standard video cameras within and beyond the D90's price range.[10]
The Nikon D90 has been tested by many independent reviewers since its introduction[11][12]. Most reviews of the D90 have been positive, assessing the D90 as a notable improvement over its predecessor, the Nikon D80. The camera received 4 stars out of 5 in CNET's editor review[13] and Photocrati's Nikon D90 review labeled the D90 a "best value" DSLR[14]. Digital Photography Review also published a highly positive assessment[15], but noted that the only weakness seemed to be that matrix metering on the D90 is tied too strongly to individual focus points, and therefore allows highlights to be clipped in other areas of an image. DxOmark's camera sensor ranking places the D90 above its competitors and even higher priced cameras like the Canon EOS 1D Mark III and Canon EOS 5D, partly due to a high dynamic range.[16]
As noted above, one of the most notable features of the Nikon D90 is that it is the first digital SLR cameras to include high definition video capabilities. While most reviewers gave the D90's HD Video high marks, Nikon expert Thom Hogan noted that the HD Video capability, while novel, was not yet refined, providing only mono sound, and being subject to video flaws such as apparent distorted motion of stationary objects when panning left to right.[17]
Sami Yusuf (born July 1980) is a British Muslim singer-songwriter, Yusuf's music comprises mostly of songs to do with Islam and being a Muslim in today's world. He also deals with many social and humanitarian issues in his music. Presently, he is fast becoming a very popular figure in the Islamic world, having made videos for several of his tracks;[1] according to The Guardian, he "has good claim to being the most famous British Muslim in the world".[2] In 2006 Time Magazine called him "Islam's biggest rock star".[3]
Biography
Sami Yusuf was born in 1980 in the city of Tehran, Iran[2] and moved to Britain when he was three, and he was raised in West London.[4] He comes from an ethnic Azeri family.[5][6] At a very young age he started to play various musical instruments and enthusiastic in keeping interest in singing and composing. He was accepted as a composition student at the Royal Academy of Music in London.[2] In addition to his education in Western harmonics and composition, Sami has a solid understanding of the Iranian and Middle Eastern modes (or Maqams) and is thoroughly acquainted and familiar with both East and Western musical traditions.[citation needed]
Career
Sami has been featured by Time Magazine as "Islam's biggest rock star"[3] and has appeared on the covers of dozens of other mainstream publications around the world[citation needed]. Sami is devoutly spiritual and often uses his art and music as a means of promoting the messages of love, mercy, peace and tolerance, whilst encouraging the youth to be proud of their identity.[citation needed] Sami Yusuf’s songs have revolutionalized the nasheed industry and have given birth to a new genre of modern Islamic music. [7]
2003-2005: First albums
Sami's first album Al-Mu'allim was self-produced and released in July 2003 and attained huge success. His second album, My Ummah, which was released in 2005, comes in two versions, a musical version and one with just percussion. He creates many of his songs in different languages mainly in English, Arabic, Urdu and Turkish and Persian. He has held concerts all around the world, and is albums were mainly popular among young Muslims, in particular Turkey, where his concert gathered up to 250,000 people, at Istanbul in 2007.[8]
Disputed third album
A third album, Without You, was planned for release during mid-2008 but was delayed due to a contractual dispute.[9] An album by that name was then launched by Awakening Records in January 2009.[9] Sami Yusuf subsequently stated on his official website that this album was released without his knowledge or consent, and is a compilation of demos and sketches with a quality inferior to his normally high standards. He has called for fans to boycott it.[10][11] However as of April 2009 Awakening Records continues to feature the album prominently on the Sami Yusuf part of its website,[12] saying that the album is "a complete and high quality album" consisting of "11 professionally recorded tracks".[9] Awakening says it has already made "substantial" payments to Yusuf for his third album, which has been advertised on www.samiyusuf.com since May 2008.[9] Yusuf had previously released two albums with Awakening, and signed for a total of five.[9]
The album features eleven tracks by the artist, written in the languages English, Arabic, Urdu, and Turkish.[13] The songs were all composed, arranged and recorded by Sami Yusuf, and the vocals are also Yusuf's.[9]
Charity work
Sami is known for his charity work which he takes out of his own time to help the needy all around the world. In October 2007 Sami traveled to Sudan and visited Sudanese orphanage as part of support mission to raise awareness for sick children and AIDs victims in the region. Sami urged prayers for peace, recovery and donations through the Muslims to contact their local charities.[14] This was after performing at Wembley Stadium where all profits went to Islamic Relief to help the crisis in Darfur.[15] A year later, in October 2008 Sami traveled to South Africa and in between concerts on his South Africa tour, Sami took the time to visit and help cheer up the children at the The Agape Children’s Orphanage.[16]. In Jan 2009 Sami travelled to Turkey where he was invited by HE Emine Erdoğan, wife of the Turkish Prime Minister Recep Tayyip Erdoğan, to attend a rally in support of peace in Gaza.[17]. A month later, in February, 2009 Sami Yusuf has taken part in a Telethon to raise money for the victims of Gaza. The telethon took place in Doha, Qatar on 31 January, 2009 in conjunction with The Al Fakhoora Campaign to raise money for the bereaved and destitute of Gaza. To date over $100 million has been raised.[18]
http://en.wikipedia.org/wiki/Sami_Yusuf
Career
Sami has been featured by Time Magazine as "Islam's biggest rock star"[3] and has appeared on the covers of dozens of other mainstream publications around the world[citation needed]. Sami is devoutly spiritual and often uses his art and music as a means of promoting the messages of love, mercy, peace and tolerance, whilst encouraging the youth to be proud of their identity.[citation needed] Sami Yusuf’s songs have revolutionalized the nasheed industry and have given birth to a new genre of modern Islamic music. [7]
2003-2005: First albums
Sami's first album Al-Mu'allim was self-produced and released in July 2003 and attained huge success. His second album, My Ummah, which was released in 2005, comes in two versions, a musical version and one with just percussion. He creates many of his songs in different languages mainly in English, Arabic, Urdu and Turkish and Persian. He has held concerts all around the world, and is albums were mainly popular among young Muslims, in particular Turkey, where his concert gathered up to 250,000 people, at Istanbul in 2007.[8]
Disputed third album
A third album, Without You, was planned for release during mid-2008 but was delayed due to a contractual dispute.[9] An album by that name was then launched by Awakening Records in January 2009.[9] Sami Yusuf subsequently stated on his official website that this album was released without his knowledge or consent, and is a compilation of demos and sketches with a quality inferior to his normally high standards. He has called for fans to boycott it.[10][11] However as of April 2009 Awakening Records continues to feature the album prominently on the Sami Yusuf part of its website,[12] saying that the album is "a complete and high quality album" consisting of "11 professionally recorded tracks".[9] Awakening says it has already made "substantial" payments to Yusuf for his third album, which has been advertised on www.samiyusuf.com since May 2008.[9] Yusuf had previously released two albums with Awakening, and signed for a total of five.[9]
The album features eleven tracks by the artist, written in the languages English, Arabic, Urdu, and Turkish.[13] The songs were all composed, arranged and recorded by Sami Yusuf, and the vocals are also Yusuf's.[9]
Charity work
Sami is known for his charity work which he takes out of his own time to help the needy all around the world. In October 2007 Sami traveled to Sudan and visited Sudanese orphanage as part of support mission to raise awareness for sick children and AIDs victims in the region. Sami urged prayers for peace, recovery and donations through the Muslims to contact their local charities.[14] This was after performing at Wembley Stadium where all profits went to Islamic Relief to help the crisis in Darfur.[15] A year later, in October 2008 Sami traveled to South Africa and in between concerts on his South Africa tour, Sami took the time to visit and help cheer up the children at the The Agape Children’s Orphanage.[16]. In Jan 2009 Sami travelled to Turkey where he was invited by HE Emine Erdoğan, wife of the Turkish Prime Minister Recep Tayyip Erdoğan, to attend a rally in support of peace in Gaza.[17]. A month later, in February, 2009 Sami Yusuf has taken part in a Telethon to raise money for the victims of Gaza. The telethon took place in Doha, Qatar on 31 January, 2009 in conjunction with The Al Fakhoora Campaign to raise money for the bereaved and destitute of Gaza. To date over $100 million has been raised.[18]