Optics Objective Lens

physics homework problem, has to do with optics, help!?

Which of the following is a correct statement?
a)the image formed by the objective of a microscope is smaller than the object
b)the image formed by the objective lens of a telescope is larger than the object
c)the image formed by the eyepiece is real for both a microscope and a telescope
d)the image formed by the objective lens of a microscope is larger than the object
I am really not so sure about this one (

I am thinking it is D... it's been a while since optics for me, but microscopes make images bigger than the object, just as telescopes make images smaller. C is iffy for me, as I know microscopes and telescopes both use multiple lenses, so I don't know if they are real images.

Countersniper Optics DOH329 Countersniper Optics 3x25 with 56 Objective $896.94 ATTRIBUTES. nbsp;Finish:nbsp;Anodized Black Matte. nbsp;Lens Coatings:nbsp;MultiCoated. nbsp;Magnification:nbsp;325X. nbsp;Material:nbsp;T6061 Aircraft Aluminum . nbsp;Objective Lens:nbsp;56mm

Objective (Optics) $90.81 High Quality Content by WIKIPEDIA articles In an optical instrument, the objective is the optical element that gathers light from the object being observed and focuses the light rays to produce a real image. Objectives can be single lenses or mirrors, or combinations of several optical elements. They are used in microscopes, telescopes, cameras, slide projectors, CD players and many other optical instruments. Objectives are also called object lenses, object glasses, or objective glasses. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 128 Publication Date: 2010/07/08 Language: English Dimensions: 5.98 x 9.01 x 0.30 inches

Excavator 6-24x50 Adjustable Objective Riflescope $296.5 Everything that you've heard about this scope is accurate! Excavator scopes feature an adjustable objective lens for parallax correction for specific ranges as will as an illuminated reticle. The reticle is designed with a rheostat that offers 11 brightness settings for a full range of light intensities and is specifically designed for big-game hunting and long-range target and varmint hunting. With its extensive list of features including multicoated optics, large objective lens for maximum light transmission, adjustable objective lens for parallax correction and illuminated reticle, Excavator is the ideal choice for hunters who want consistent accuracy in all types of lighting conditions. Backed by the manufacturer's Limited Lifetime WarrantyFEATURES:6-24x variable magnification with large 50 mm objective lens in a 100% waterproof and fogproof extra rigid shockproof construction Multicoated optics with Illuminated Target Dot reticles Adjustable Objective lens is built with a adjustable mechanism that allows for parallax correction for specific ranges starting form 20-25 yards to infinity.1" tube construction with fast focus eyebellBonus accessories includes set of 5/8" high ring, Sun-shade, and Flip-Up Covers. PRODUCT SPECIFICATIONS:Specifications:6-24xField of View (ft@100yds/m@100m) =15.0/5@6x-4.2/1.4@24xExit Pupil = 8.3-2.1mmEye Relief = 3.6"Click value = 1/8. Reticle: IR Target Dot

Excavator 4-16x50 Adjustable Objective Riflescope $260.75 Everything that you've heard about this scope is accurate! Excavator scopes feature an adjustable objective lens for parallax correction for specific ranges as will as an illuminated reticle. The reticle is designed with a rheostat that offers 11 brightness settings for a full range of light intensities and is specifically designed for big-game hunting and long-range target and varmint hunting. With its extensive list of features including multicoated optics, large objective lens for maximum light transmission, adjustable objective lens for parallax correction and illuminated reticle, Excavator is the ideal choice for hunters who want consistent accuracy in all types of lighting conditions. Backed by the manufacturer's Limited Lifetime WarrantyFEATURES:4-16x variable magnification with large 50 mm objective lens in a 100% waterproof and fogproof extra rigid shockproof construction Multicoated optics with Illuminated Target Dot reticles Adjustable Objective lens is built with a adjustable mechanism that allows for parallax correction for specific ranges starting form 20-25 yards to infinity.1" tube construction with fast focus eyebellBonus accessories includes set of 5/8" high ring, Sun-shade, and Flip-Up Covers. PRODUCT SPECIFICATIONS:Specifications:4-16xField of View (ft@100yds/m@100m) =19.8/6.6@4x-5.8/1.9@16xExit Pupil = 12.5-3.1mmEye Relief = 3.5"Click value = 1/8. Reticle: IR Target Dot

Barska Optics Binoculars AB10168 1030x50 Zoom Gladiator Ruby Lens $57.2 1030x50 Zoom Gladiator BK7 Ruby Lens Powerful zoom Multicoated optics Large objective lens for increased light transmission for brighter images Shockabsorbing rubber armor Ruby lens to minimize UV glare Tripodadaptable fittings for a steady view Ideal for all outdoor activities and sporting events Includes carrying case and neckstrap Barska s Limited Lifetime Warranty. Measurements:. Length: 8.3. Width: 3.3. Height: 8.7

Barska Optics Binoculars AB10796 721x40 Zoom Gladiator Ruby Lens $53.05 721x40 Zoom Gladiator BK7 Ruby Lens Powerful zoom Multicoated optics Large objective lens for increased light transmission for brighter images Shockabsorbing rubber armor Ruby lens to minimize UV glare Tripodadaptable fittings for a steady view Ideal for all outdoor activities and sporting events Includes carrying case and neckstrap Barska s Limited Lifetime Warranty. Measurements:. Length: 7.8. Width: 3.2. Height: 6.9

Barska Optics Binoculars AB10762 1030x60 Zoom Gladiator Ruby Lens $69.97 1030x60 Zoom Gladiator BK7 Ruby Lens Powerful zoom Multicoated optics Large objective lens for increased light transmission for brighter images Shockabsorbing rubber armor Ruby lens to minimize UV glare Tripodadaptable fittings for a steady view Ideal for all outdoor activities and sporting events Includes carrying case and neckstrap Barska s Limited Lifetime Warranty. Measurements:. Length: 9.1. Width: 4.1. Height: 10.6

Barska Optics Binoculars AB11180 824X50 Zoom Gladiator Ruby Lens $56.38 824X50 Zoom Gladiator BK7 Ruby Lens Powerful zoom Multicoated optics Large objective lens for increased light transmission for brighter images Shockabsorbing rubber armor Ruby lens to minimize UV glare Tripodadaptable fittings for a steady view Ideal for all outdoor activities and sporting events Includes carrying case and neckstrap Barska s Limited Lifetime Warranty. Measurements:. Length: 8.3. Width: 3.4. Height: 8.6

Hot Magnum 3-12x40 Riflescope with Adjustable Objective $210.75 By our calculation, this is one hot scope! Engineered with revolutionary bullet-drop technology, .17 Hot Magnum scopes will make you an extreme performer when it comes to .17 Magnum rimfire shooting. To provide extreme accuracy for the .17 Magnum rimfire caliber, the scope's elevation knob is precisely calculated to compensate for the elliptical drop of the .17 Magnum rimfire with a 17 grain bullet. Add features like high density optical glass for crisp edge-to-edge clarity, multicoated optics for brighter viewing and adjustable objective for parallax correction, this scope is unbeatable. Backed by the manufacturer's Limited Lifetime WarrantyFEATURES:3-12x variable magnification with large 40 mm objective lens in a 100% waterproof and fogproof extra rigid shockproof construction Multicoated optics with 30/30 reticles.Adjustable Objective lens for parallax correction.Specifically engineered for .17 Magnum Rimfire Rifle and Pre-calculated trajectory compensation form 100 to 300 yards by turn of a dialBullet Drop TechnologyPRODUCT SPECIFICATIONS:Specifications:3-12xField of View (ft@100yds/m@100m) =26.7/8.8@3x-7.4/2.5@12xExit Pupil = 10.8-3.3mmEye Relief = 3.1"Click value = 1/4.

Hot Magnum 6-18x40 Riflescope with Adjustable Objective $232.25 By our calculation, this is one hot scope! Engineered with revolutionary bullet-drop technology, .17 Hot Magnum scopes will make you an extreme performer when it comes to .17 Magnum rimfire shooting. To provide extreme accuracy for the .17 Magnum rimfire caliber, the scope's elevation knob is precisely calculated to compensate for the elliptical drop of the .17 Magnum rimfire with a 17 grain bullet. Add features like high density optical glass for crisp edge-to-edge clarity, multicoated optics for brighter viewing and adjustable objective for parallax correction, this scope is unbeatable. Backed by the manufacturer's Limited Lifetime WarrantyFEATURES:6-18x variable magnification with large 40 mm objective lens in a 100% waterproof and fogproof extra rigid shockproof construction Multicoated optics with 30/30 reticles.Adjustable Objective lens for parallax correction.Specifically engineered for .17 Magnum Rimfire Rifle and Pre-calculated trajectory compensation form 100 to 300 yards by turn of a dialBullet Drop Technology PRODUCT SPECIFICATIONS:Specifications:6-18xField of View (ft@100yds/m@100m) =14.5/4.8@6x-4.5/1.5@18xExit Pupil = 6.67-2.2mmEye Relief = 3.1"Click value = 1/4.

Hot Magnum 2-7x32 Riflescope with Adjustable Objective $167.9 By our calculation, this is one hot scope! Engineered with revolutionary bullet-drop technology, .17 Hot Magnum scopes will make you an extreme performer when it comes to .17 Magnum rimfire shooting. To provide extreme accuracy for the .17 Magnum rimfire caliber, the scope's elevation knob is precisely calculated to compensate for the elliptical drop of the .17 Magnum rimfire with a 17 grain bullet. Add features like high density optical glass for crisp edge-to-edge clarity, multicoated optics for brighter viewing and adjustable objective for parallax correction, this scope is unbeatable. Backed by the manufacturer's Limited Lifetime WarrantyFEATURES:2-7x variable magnification with large 32 mm objective lens in a 100% waterproof and fogproof extra rigid shockproof construction Multicoated optics with 30/30 reticles.Adjustable Objective lens for parallax correction.Specifically engineered for .17 Magnum Rimfire Rifle and Pre-calculated trajectory compensation form 100 to 300 yards by turn of a dialBullet Drop TechnologyPRODUCT SPECIFICATIONS:Specifications:2-7xField of View (ft@100yds/m@100m) =45.47/15.2@2x-14/4.7@7xExit Pupil = 10.8-4.6mmEye Relief = 3.1"Click value = 1/4.

Barska Optics Binoculars AB11184 20140x80 Zoom Gladiator Green Lens $320.48 20140x80 Zoom Gladiator Green Lens BAK4 Powerful zoom Multicoated optics Large objective lens for increased light transmission for brighter images Shockabsorbing rubber armor Tripodadaptable fittings for a steady view Ideal for all outdoor activities and sporting events Includes carrying case and neckstrap Barska s Limited Lifetime Warranty. Measurements:. Length: 10.03. Width: 5.11. Height: 14.17

Barska Optics Binoculars AB11044 10x50 Escape Porro MC Green Lens $45.5 10x50 Escape Porro Green Lens Multicoated optics for sharp and crisp images Large objective lens for increased light transmission Shockabsorbing rubber armor Tripodadaptable fittings for a steady view Ideal for all outdoor activities and sporting events Includes carrying case and neckstrap Barska s Limited Lifetime Warranty. Measurements:. Length: 7.25. Width: 3.125. Height: 7.75

Barska Optics Binoculars AB11188 9x63 Blackhawk Fully MultiCoated Green Lens $106.07 9x63 Blackhawk Solid construction roof prism binoculars Large objective lens for improved light transmission Large ocular lens Fully multicoated optics delivers luminous and high contrast images Ergonomic and sleek rubber armor Ideal for all terrestrial observations and astronomy viewing Includes carrying case and neckstrap. Barska s Limited Lifetime Warranty. Measurements:. Length: 9. Width: 3.75. Height: 10.6

Barska Optics Binoculars AB11046 20x50 Escape Porro MC Green Lens $53.87 20x50 Escape Porro Green Lens Multicoated optics for sharp and crisp images Large objective lens for increased light transmission Shockabsorbing rubber armor Tripodadaptable fittings for a steady view Ideal for all outdoor activities and sporting events Includes carrying case and neckstrap Barska s Limited Lifetime Warranty. Measurements:. Length: 7.5. Width: 3.125. Height: 7.75

Barska Optics Binoculars AB11186 8x56 Blackhawk Fully MultiCoated Green Lens $97.07 8x56 Blackhawk Solid construction roof prism binoculars Large objective lens for improved light transmission Large ocular lens Fully multicoated optics delivers luminous and high contrast images Ergonomic and sleek rubber armor Ideal for all terrestrial observations and astronomy viewing Includes carrying case and neckstrap. Barska s Limited Lifetime Warranty. Measurements:. Length: 8.6. Width: 3.5. Height: 9.6

Microscope Objective Lens Stage Optical Slide $24.99 Microscope Objective Lens Stage Optical Slide - Photographic Print

AmScope Plan Objective Lens Set $293.02 These are a brand new microscope Plan Achromatic objective lens set with high quality. It comes with 4X, 10X, 40X &100X plan Achromatic objective lenses. They fit common size (DIN standard) compound / biological microscopes. Your satisfaction is guaranteed or your money back. Type: Microscopes

Barska Optics Binoculars AB10156 20x50 WA XTrail Ruby Lens $53.05 20x50 WA Xtrail Ruby Lens Porro prism binoculars Multicoated optics Wide angle models provides a wider field of view Large objective lenses maximize light transmission for sharper images Rugged and durable rubber armor with nonslip grip Ideal for all outdoor activities and sporting events Includes carrying case and neckstrap Barska s Limited Lifetime Warranty. Measurements:. Length: 8.5. Width: 3.1. Height: 7.9

Barska Optics Binoculars AB10176 10x50 Xrail Reverse Porro Ruby Lens $55.56 10x50 Xtrail Reverse Porro Ruby Lens Porro prism binoculars Multicoated optics Large objective lenses maximize light transmission for sharper images Rugged and durable rubber armor with nonslip grip Ideal for all outdoor activities and sporting events Includes carrying case and neckstrap Barska s Limited Lifetime Warranty. Measurements:. Length: 6.3. Width: 3.4. Height: 8.3

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Vignetting in photography and optics ..or fiction!

Projecter and Screen: Dealing with Lens Optics?

When the distance between a projector and the screen is increased, what adjustment must be made in the distance between the film and the objective lens to bring the image back into focus?

We have 1/f = 1/do + 1/di

so 1/do = 1/f - 1/di

Therefore do = f*di/(di - f) The object distance must be adjusted according to this equation