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Topics referred to by the same term
Look up ef in Wiktionary, the free dictionary. EF or ef may refer to: Ef (band), a post-rock band from Sweden Ef: A Fairy Tale of the Two., a Japanese
EF
Tornado intensity rating scale
The Enhanced Fujita scale (abbreviated EF-Scale) is a scale that rates tornado intensity based on the severity of the damage a tornado causes. It is used
Enhanced_Fujita_scale
Electronic warfare aircraft
The General Dynamics–Grumman EF-111A Raven is a retired electronic-warfare aircraft that was designed and produced by the American aerospace manufacturers
General Dynamics–Grumman EF-111A Raven
General_Dynamics–Grumman_EF-111A_Raven
Sixth letter of the Latin alphabet
other modern western European languages. Its name in English is ef (pronounced /ˈɛf/ ), and the plural is efs, when the letter is used as a noun . The
F
Country ranking of English language skills
The EF English Proficiency Index (EF EPI) attempts to rank countries and territories by the equity of English language skills amongst those adults who
EF_English_Proficiency_Index
Japanese visual novel and anime series
Ef: A Fairy Tale of the Two is a Japanese two-part adult visual novel series by Minori for Windows and PlayStation 2. The first game in the series, Ef:
Ef:_A_Fairy_Tale_of_the_Two
Standard lens mount on the Canon EOS family
The EF lens mount is the standard lens mount on Canon’s EOS family of cameras. EF stands for "Electro-Focus": automatic focusing on EF lenses is handled
Canon_EF_lens_mount
International education company
EF Education First (abbreviated as EF) is an international education company that specialises in language training, educational travels, academic degree
EF_Education_First
American stock brokerage firm
EF Hutton was an American stock brokerage firm founded in 1904 by Edward Francis Hutton and his brother, Franklyn Laws Hutton. Later, it was led by well-known
EF_Hutton
Topics referred to by the same term
Enhanced Fujita scale of tornado strength Milwaukee Road class EP-1, EF-1, EF-2, EF-3, and EF-5, a type of railroad engine This disambiguation page lists articles
EF-5
Australian full-size car
The Ford Falcon (EF) is a full-size car that was produced by Ford Australia from 1994 to 1996. It was the fourth significantly updated iteration of the
Ford_Falcon_(EF)
Prokaryotic elongation factor
EF-Tu (elongation factor thermo unstable) is a prokaryotic elongation factor responsible for catalyzing the binding of an aminoacyl-tRNA (aa-tRNA) to the
EF-Tu
Class of electric locomotive
Milwaukee, St. Paul and Pacific Railroad (Milwaukee Road) classes EP-1 and EF-1 comprised 42 boxcab electric locomotives built by the American Locomotive
Milwaukee_Road_class_EF-1
1994 multi-role combat aircraft family by Eurofighter
aircraft was known as Eurofighter EFA from the late 1980s until it was renamed EF 2000 in 1992. By 1990, the selection of the aircraft's radar had become a
Eurofighter_Typhoon
Pharmaceutical compound
2C-EF-FLY is a psychedelic drug of the phenethylamine, 2C, and FLY families. It is the FLY (benzodifuran) derivative of 2C-EF and is a fluorinated derivative
2C-EF-FLY
American cycling team
EF Education–Oatly is a women's professional cycling team founded ahead of the 2024 season. The team is based in the United States and competes in elite
EF_Education–Oatly
Letter of the Cyrillic alphabet
Ef or Fe (Ф ф; italics: Ф ф or Ф ф; italics: Ф ф) is a Cyrillic letter, commonly representing the voiceless labiodental fricative /f/, like the pronunciation
Ef_(Cyrillic)
American carrier-capable multirole strike aircraft
new paint job for a few units. This version is locally known as EF-18MLU/C.15M/EF-18M. EF-18B: Two-seat training version for the Spanish Air and Space Force
McDonnell Douglas F/A-18 Hornet
McDonnell_Douglas_F/A-18_Hornet
Digital camera lens mount model
The Canon EF-S lens mount is a derivative of the EF lens mount created for some Canon digital single-lens reflex cameras with APS-C sized image sensors
Canon_EF-S_lens_mount
Derivative of the Canon EF lens mount
The Canon EF-M lens mount, introduced in 2012, is a derivative of the Canon EF lens mount designed for use with the Canon EOS M mirrorless interchangeable-lens
Canon_EF-M_lens_mount
German aerospace and engineering company
Junkers EF 062, early EF 128 design study Junkers EF 063, early EF 128 design study Junkers EF 065, possible early EF 082 design study, 1939. Junkers EF 066
Junkers
German experimental pulsejet fighter
The Junkers EF 126 was an experimental fighter proposed by the German Miniaturjägerprogramm of 1944–1945, for a cheap and simple fighter powered by a pulsejet
Junkers_EF_126
Pharmaceutical compound
2C-EF, also known as 4-(2-fluoroethyl)-2,5-dimethoxyphenethylamine, is a psychedelic drug of the phenethylamine and 2C families. It is the 2C analogue
2C-EF
Prokaryotic elongation factor
mitochondria as TSFM. It is similar to eukaryotic EF-1B. EF-Ts serves as the guanine nucleotide exchange factor for EF-Tu (elongation factor thermo unstable), catalyzing
EF-Ts
Protein helix–loop–helix motif
The EF hand is a helix–loop–helix structural domain or motif found in a large family of calcium-binding proteins. The EF-hand motif contains a helix–loop–helix
EF_hand
1973–1978 single-lens reflex camera
EF is a manual focus 35mm single-lens reflex camera produced by Canon between 1973 and 1978. It was compatible with Canon's FD-mount lenses. The EF was
Canon_EF_camera
visual novel series Ef: A Fairy Tale of the Two. by the Japanese software company Minori. The first anime adapts the whole first game Ef: The First Tale.
List_of_Ef_episodes
Association football club in Spain
qualified to the 2024–25 Copa del Rey after winning the Supercopa Regional. EF Dolorense on Instagram (in Spanish) "Escuela de Fútbol Dolorense" (in Spanish)
EF_Dolorense
Topics referred to by the same term
Canon EF-M may refer to: Canon EF-M camera, manual-focus 35mm film, SLR camera by Canon (introduced in 1991) Canon EF-M lens mount, lens mount for Canon
Canon_EF-M
Prokaryotic elongation factor
EF-G (elongation factor G, historically known as translocase) is a prokaryotic elongation factor involved in mRNA translation. As a GTPase, EF-G catalyzes
EF-G
South Korean boy band
R.ef was a boyband trio in South Korea. Their main genres were K-pop and hip-hop. In 1995, 21-year-old singer Lee Sung Wook (이성욱), 25-year-old rapper Park
R.ef
Star in the constellation Eridanus
EF Eridani (abbreviated EF Eri, sometimes incorrectly referred to as EF Eridanus)[citation needed] is a variable star of the type known as polars, AM
EF_Eridani
American cycling team
EF Education–Aevolo is an American UCI Continental cycling team founded in 2017. Since 2025 the team serves as a development team for UCI WorldTeam EF
EF_Education–Aevolo
Camera lens
Canon EF-S 18–55mm lens f/3.5–5.6 is a Canon-produced wide-angle to mid telephoto zoom lens for digital single-lens reflex cameras with an EF-S lens
Canon_EF-S_18–55mm_lens
Unicode character
MARK. The UTF-8 representation of the BOM is the (hexadecimal) byte sequence EF BB BF. The Unicode Standard permits the BOM in UTF-8, but does not require
Byte_order_mark
American two-way radio manufacturer, subsidiary of JVCKenwood
EF Johnson Technologies, Inc. is a two-way radio manufacturer founded by its namesake, Edgar Frederick Johnson, in Waseca, Minnesota, United States in
EF_Johnson_Technologies
U.S. twinjet night fighter aircraft (1951–1970)
operating the EF-10B on 17 April 1965 under Lt. Col Wes Corman at Da Nang Air Base Republic of Vietnam with six aircraft. No more than 10 EF-10Bs were in
Douglas_F3D_Skyknight
Family of camera lens
The EF 50mm lenses are a group of normal prime lenses made by Canon that share the same focal length. These lenses are based on the classic double-Gauss
Canon_EF_50mm_lens
Swedish post-rock band
Ef (stylized as EF) is a post-rock band from Gothenburg, Sweden. Using little vocals, they feature a wide variety of instruments. Their debut album Give
Ef_(band)
Soviet/German jet bomber project
The OKB-1/Junkers EF 131 was a jet bomber produced in Germany and the USSR from 1944. It was cancelled in August 23, 1948, after further work was stopped
OKB-1_EF_131
Mirrorless camera lens mount
that of the Canon EF and EF-S mounts at 44 mm and longer than the EF-M mount at 18 mm. An EF-EOS R lens adapter enables Canon EF, EF-S, TS-E and MP-E lenses
Canon_RF_lens_mount
American electronic warfare aircraft
Compass Call EB-57A Canberra EB-66C/E Destroyer EC-130H Compass Call EF-10B Skyknight EF-111A Raven ISTAR ESM Boeing RC-135 EC-121M Warning Star EC-130E/J
Boeing_EA-18G_Growler
Prototype German jet bomber
EF 131 which was flown on 23 May 1947, but by that time, jet development had already overtaken the Ju 287. A final much-enlarged derivative, the EF 140
Junkers_Ju_287
Camera lens
The EF 100–400 mm f/4.5–5.6L IS USM is a professional EF mount telephoto zoom lens manufactured by Canon Inc. The first version of this lens was announced
Canon_EF_100-400mm_lens
Standardized English language test
The EF Standard English Test is a standardized test of the English language designed for non-native English speakers. It is the product of EF Education
EF_Standard_English_Test
Unicode block containing some special codepoints and two non-characters
valid string of Unicode code points for display. The replacement character (0xEF 0xBF 0xBD) may get written out if the viewer saves or copies the text; these
Specials_(Unicode_block)
The Junkers EF 61 was a German prototype twin-engined high-altitude bomber aircraft of the 1930s. Only two examples were built, but it provided valuable
Junkers_EF_61
US code name for a type of military aircraft
specifications. Although in some documentation the F-105F was referred to as an EF-105F, that designation never existed in the operational flying squadrons.
Wild_Weasel
Camera lens manufactured by Canon
prime L-series lenses for the discontinued FD lens mount, for the current EF lens mount used on all Canon EOS SLR cameras and for the RF mount used on
Canon_L_lens
Type of aircraft
The EF 132 was a planned jet bomber, under development for the Luftwaffe during World War II. It was the last aircraft project development undertaken by
Junkers_EF_132
German rocket fighter project
The Junkers EF 127 was a rocket powered fighter aircraft designed by the Third Reich as a part of the Emergency Fighter Program in the closing year of
Junkers_EF_127
Pattern-recognition receptor (PRR)
EF-Tu receptor, abbreviated as EFR, is a pattern-recognition receptor (PRR) that binds to the prokaryotic protein EF-Tu (elongation factor thermo unstable)
EF-Tu_receptor
Eukaryotic elongation factors
eEF-1 are two eukaryotic elongation factors. It forms two complexes, the EF-Tu homolog EF-1A and the EF-Ts homolog EF-1B, the former's guanide exchange
EEF-1
American professional men's cycling team
EF Education–EasyPost (UCI Code: EFE) is an American professional cycling team. Founded in 2003, they have competed in the UCI World Tour since 2009. Headquartered
EF_Education–EasyPost
Photographic lens
features a maximum aperture of f/2.8. It was Canon's first EF pancake lens. The EF 40mm was the first EF lens equipped with a stepping motor (STM). It was discontinued
Canon_EF_40mm_lens
Group of teleconverter lenses made by Canon
The Canon Extender EF lenses are a group of teleconverter lenses made by Canon. These lenses are used between any compatible EF type lens and any of the
Canon_Extender_EF
Football club
Escuela de Fútbol Concepción is a football team based in Madrid in the autonomous community of Community of Madrid. It plays in the Preferente de Aficionados
EF_Concepción
24mm lenses for its Canon EF and EF-S lens mounts. Three have been discontinued after updated replacements were announced. EF 24mm f/1.4L USM, introduced
Canon_EF_24mm_lens
German-born British statistician and economist (1911–1977)
ISBN 9780671747664 Small Is Beautiful Section 2, Chapters 3–4. Schumaker, EF. Harper and Row Publishers. 1989. "Scott Bader". Scott Bader. Archived from
E._F._Schumacher
Canon SLR EF mount prime lens
The Canon EF 35mm lenses are a family of wide angle prime lenses with EF mount made by Canon Inc. The family also includes one EF-S lens that only mounts
Canon_EF_35mm_lens
Statistical tool used in project management
get an EF of 10.33. This EF is used as the ES for f. The ES for e is the greatest EF of its predecessor activities (b and c). Since b has an EF of 5.33
Program evaluation and review technique
Program_evaluation_and_review_technique
Super-telephoto lens
The EF 1200 mm f/5.6 L USM is a super-telephoto prime lens that was made by Canon Inc. It uses an EF mount, and is compatible with the Canon EOS camera
Canon_EF_1200mm_lens
Football club
Étoile Filante Bastiaise or ÉF Bastia was a French association football club from Biguglia, Corsica. Founded in 1920, they last played in the Regional
ÉF_Bastia
Swedish businessman
Swedish billionaire, known for founding educational and language school company EF Education First in 1965, and for being the patron and namesake of Hult International
Bertil_Hult
Proposed German jet fighter aircraft
The Junkers EF 128 was a project for a single-engine jet fighter, developed for the Emergency Fighter Program Luftwaffe design competition during the Second
Junkers_EF_128
Spanish football team
Club Deportivo Tedeón is a Spanish football team based in Navarrete in the autonomous community of La Rioja. Founded in 1947, it plays in Regional Preferente
CD_Tedeón
Canon DSLR EF mount lens
Canon EF 24–70mm lens is a family of professional EF mount wide-to-normal zoom lenses manufactured and sold by Canon. The first of the family, the EF 24–70mm
Canon_EF_24–70mm_lens
Series of camera lenses manufactured by Canon
Canon EF Portrait Lenses Canon EF 200mm lens Canon EF 135mm lens Canon EF 100mm lens Canon EF 50mm lens Canon EF 35mm lens Canon EF 24mm lens Canon EF 14mm
Canon_EF_85mm_lens
EF mount wide-to-telephoto zoom lens
The EF 24–105mm f/4L IS USM is an EF mount wide-to-telephoto zoom lens. It was introduced by Canon in 2005 to complement the well-regarded 17–40mm f/4L
Canon_EF_24-105mm_lens
Open source object-relational mapping framework
Entity Framework (EF) is an open source object–relational mapping (ORM) framework for ADO.NET. It was originally shipped as an integral part of .NET Framework
Entity_Framework
GABA reuptake inhibitor
EF-1502 is a GABA reuptake inhibitor. It could potentially be used to treat seizures. EF-1502 has been shown to inhibit the type 1 GABA transporter (GAT1)
EF-1502
35mm SLR camera
The Canon EF-M was a manual-focus 35mm film, SLR camera which used the Canon EF lens mount. It was introduced in 1991 for export to the non-Japanese market
Canon_EF-M_camera
Canon SLR EF mount prime lens
The Canon EF 400mm are seven super-telephoto lenses made by Canon. These lenses have an EF mount that work with the EOS line of cameras. These lenses are
Canon_EF_400mm_lens
Type of aircraft
such as the EF-131 and '140', which used many components of the two EF-131's, as well as design work on the stillborn[clarification needed] EF 132 long-range
OKB-1_150
Camera lens
The EF 70–200mm lenses are a group of telephoto zoom full-frame lenses made by Canon. The lenses have an EF mount to work with the EOS line of cameras
Canon_EF_70–200mm_lens
2012 Japanese smartphone
The ARROWS ef FJL21 is a smartphone developed for the Japanese domestic market by Fujitsu Mobile Communications (under the Fujitsu brand, currently FCNT)
Fujitsu_ARROWS_ef
2012 Super-35 digital cinema camera
it only shoots in Full HD. The camera has an EF lens mount, making it compatible with EF, EF-S and EOS EF Cinema lenses. Canon Super 35mm CMOS Sensor AVCHD
Canon_EOS_C100
French football club
Federal (EF) teams were created at the request of the Vichy France government. These brought together professional players from D1 clubs. ÉF Reims-Champagne
ÉF_Reims-Champagne
Canon SLR EF-mount zoom lens
Canon EF telephoto zoom lenses carry the 70–300mm designation. EF 70–300mm f/4.5–5.6 DO IS USM EF 70–300mm f/4–5.6L IS USM EF 70–300mm f/4–5.6 IS USM EF 70–300mm
Canon_EF_70-300mm_lens
US Air Force supersonic fighter-bomber
endurance to effectively protect the F-105. The resulting EF-105F Wild Weasel III (the EF designation was popularly used but unofficial) supplemented
Republic_F-105_Thunderchief
Irish cyclist (born 2000)
2000) is an Irish professional cyclist, who currently rides for UCI WorldTeam EF Education–EasyPost. He has won stages at the 2023 Giro d'Italia and the 2025
Ben_Healy_(cyclist)
Lens mount by Sigma corporation
flange focal distance of 44.00 mm, identical to that of the Canon EF-mount. Like the EF-mount, the SA-mount uses electrical communication between body and
Sigma_SA-mount
Class of General Electric locomotives
Joes (or a set of EF-5 boxcabs) in the 1960s and 1970s. The external difference that most readily distinguished class EP-4 from EF-4 was the use of roller
Little Joe (electric locomotive)
Little_Joe_(electric_locomotive)
US Air Force supersonic aircraft, 1964–1998
Compass Call EB-57A Canberra EB-66C/E Destroyer EC-130H Compass Call EF-10B Skyknight EF-111A Raven ISTAR ESM Boeing RC-135 EC-121M Warning Star EC-130E/J
Lockheed_SR-71_Blackbird
Class of 22 electric locomotives
The New Zealand EF class locomotive (originally Class 30) is a class of 25 kV 50 Hz AC electric locomotives that operate on the North Island Main Trunk
New Zealand EF class locomotive
New_Zealand_EF_class_locomotive
Canon DSLR EF-S-mount zoom lens
The Canon EF-S 18–135mm lens is a standard to short telephoto telezoom for Canon digital single-lens reflex cameras with an EF-S lens mount. The field
Canon_EF-S_18–135mm_lens
35 mm camera lens
The EF 300mm lens refers to a family of telephoto prime lenses made by Canon, five of which have been sold to the general public and one of which was only
Canon_EF_300mm_lens
Proteins functioning in translation
growing polypeptide. Most common elongation factors in prokaryotes are EF-Tu, EF-Ts, EF-G. Bacteria and eukaryotes use elongation factors that are largely
Elongation_factor
1947 USSR jet bomber
OKB-1 EF 131 with Soviet turbojet engines. The initial version, a tactical jet bomber with a secondary reconnaissance role, was initiated as the EF-140
OKB-1_140
Canadian cyclist (born 2006)
professional racing cyclist, who currently rides for the UCI Women's ProTeam EF Education–Oatly. A native of Calgary, Volstad was initially a speed-skater
Alexandra_Volstad
Camera lens
The Canon EF 135mm f/2L USM is a short-to-medium telephoto lens. The "135/2" is mainly used for portrait photography and for indoor sports, where the lighting
Canon_EF_135mm_lens
35 mm camera lens
The EF 500mm lenses are a group of super-telephoto prime lenses made by Canon that share the same focal length. These lenses have an EF type mount, and
Canon_EF_500mm_lens
Camera lens for Canon
The Canon EF 100 mm lenses are used for Canon DSLR cameras. There are four different types of EF 100 mm lens for Canon. Certain lenses are best for macro
Canon_EF_100mm_lens
Elongation factor
Elongation factor 4 (EF-4) is an elongation factor that is thought to back-translocate on the ribosome during the translation of RNA to proteins. It is
EF-4
Country in Northwestern Europe
June 2025. Retrieved 5 June 2025. "10 British dialects you need to know". EF. Retrieved 5 June 2025. Track, Robert Lawrence; Stockwell, Peter (2007). Language
United_Kingdom
Series of camera lenses manufactured by Canon
The Canon EF-S 55–250mm f/4–5.6 IS lenses are a series of telephoto zoom lenses for Canon EOS digital single-lens reflex cameras with a Canon EF-S lens mount
Canon_EF-S_55–250mm_lens
6th Grand Mufti of Bosnia and Herzegovina since 2012
Husein ef. Kavazović (born 3 July 1964) is a Bosnian cleric serving as Grand Mufti (Reis-ul-ulema) of Bosnia and Herzegovina since November 2012. Son of
Husein_Kavazović
Scale for rating tornado intensity
with the Enhanced Fujita scale (EF-Scale) in the United States in February 2007. In April 2013, Canada adopted the EF-Scale over the Fujita scale along
Fujita_scale
EF 043 Junkers EF 050 VTOL design study Junkers EF 061 pressurized high-altitude bomber prototype Junkers EF 072 early design for EF 077 Junkers EF 073
List of German aircraft projects, 1939–1945
List_of_German_aircraft_projects,_1939–1945
Camera lens family
The EF 16–35 mm lens is a family of professional wide-angle lenses made by Canon Inc. The original version, the EF 16-35mm f/2.8L USM, replaced the EF 17-35mm
Canon_EF_16-35mm_lens
travel, tourism, insurance
EF
EF
EF
EF
EF
EF
EF
EF
EF
travel, tourism, insurance