Telephoto lenses. (varieties and how they are used for single lens reflex cameras)

PSA Journal | August 1, 1994| | Copyright

Telephoto lenses are used to obtain an image size larger than would be possible using a shorter lens at the same subject distance. Telephoto lenses have a fixed focal length as opposed to the variable focal length of zoom lenses. They have much less complex construction and if only one focal length is considered, a telephoto is much less expensive and has a larger maximum aperture than a zoom lens providing the same focal length. Some telephotos have focal lengths greater than even the longest zoom lens.

The special design of the telephoto produces a lens with the ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

	Lipoprotein Lipase Gene Polymorphism and Lipid Profile in Coronary Artery Disease Magazine article from: Archives of Pathology & Laboratory Medicine ; ...low-density lipoproteins (VLDL) from...circulation.1,2 Lipoprotein lipase is multifunctional...cholesterol.3 Lipoprotein lipase also...high-density lipoproteins (HDLs).1...key role in lipoprotein metabolism...
	Lipoprotein particles may predict heart attack risk Newspaper article from: The Milwaukee Journal Sentinel ; ...of testing for lipoproteins, the tiny spheres...heart disease. Lipoproteins have been compared...walls). Small lipoprotein particles can more...also improve lipoproteins. Although lipoprotein testing is gaining...
	Lipoprotein electrostatic properties regulate hepatic lipase association and activity.(Report) Magazine article from: Biochemistry and Cell Biology ; ...serum or very low density lipoprotein (VLDL) with oleic acid increased lipoprotein negative charge and stimulated...enrichment of serum or isolated lipoproteins with the anionic phospholipids...phosphatidylserine also increased lipoprotein negative charge and stimulated...
	Atherogenic remnant lipoproteins: role for proteoglycans in trapping, transferring, and internalizing.(Commentaries) Magazine article from: Journal of Clinical Investigation ; ...controlling remnant lipoprotein clearance...as these lipoproteins are highly...atherogenic lipoproteins (3, 4). Lipoprotein lipase (LPL...of remnant lipoproteins, apoE disappeared...defective remnant lipoprotein clearance...
	Lipids and lipoproteins in women Magazine article from: Mayo Clinic Proceedings ; ...circulation in lipoprotein particles. These...cholesterol. Lipoproteins are commonly...low-density lipoproteins (LDLs), and high-density lipoproteins (HDLs) on the...particles.10 Lipoprotein metabolism is...
	Discovery of the lipoproteins, their role in fat transport and their significance as risk factors Magazine article from: The Journal of Nutrition ; ...the low density lipoprotein (LDL) in 1950...revealed an array of lipoproteins that included...isolate an intact lipoprotein. THE DISCOVERY OF PLASMA LIPOPROTEINS In 1929, Michel...water-soluble lipoprotein that could be...
	Characteristics of lipoprotein peak x eluted from a column with the eluent of high-magnesium ion concentration in lipoprotein analysis using the cation-exchange chromatography. Magazine article from: American Journal of Biochemistry and Biotechnology ; ...very low density lipoprotein (VLDL), chylomicrons...for analysis of lipoproteins by ultracentrifugation...These TG rich lipoproteins are cataborized...interaction with lipoprotein lipase [19...to separate the lipoproteins. The gradient...separation of the lipoprotein classes were ...
	Changes of plasma lipoprotein(a) during and after normal pregnancy in Caucasians Magazine article from: Journal of Maternal - Fetal & Neonatal Medicine ; ...Elevated plasma concentrations of lipoprotein(a) are associated with an increased...development of atherosclerosis. High lipoprotein(a) concentrations may also be associated...but reference data on the course of lipoprotein(a) during uneventful pregnancies...
	Direct Determination of Lipoprotein Particle Sizes and Concentrations by Ion Mobility Analysis Magazine article from: Clinical Chemistry ; ...for a broad range of lipoprotein particles. Use of...concentrations of lipids and lipoproteins are strongly related...standardized lipid and lipoprotein measurements in algorithms...number of atherogenic lipoprotein particles-than by...apoB-containing lipoproteins provide clinical ...
	Genetically elevated levels of lipoprotein associated with increased risk of heart attack. Newspaper article from: Heart Disease Weekly ; ...that genetically elevated levels of lipoprotein(a) are associated with an increased...death despite targeting of low-density lipoprotein (LDL) cholesterol by statin therapy...treatment, is apparent. Elevated levels of lipoprotein(a) [a LDL particle bound to a plasminogen...