I have a Nikon D40 DSLR, If I want to make great pictures to small objects what I need to know for choosing the right lenses, because there are several lenses on sale over the internet, some of them are cheap and some very expensive, what is the basic guide? is the optics quality? thanks for your help
Basic guideline is to stick with the original manufacturers lenses. So in the case of your Nikon, that means Nikon-Nikkor lenses. Nikon once regarded it's primary line of lenses are professional lenses and only gave special designations to their "cheaper" consumer grade lenses. That is no longer a hard and fast rule. Still you will not exceed Nikon optical quality with Tokina, Sigma or any other non-OEM brand of lens.
As for choosing the right lens, that's largely determined by how you'll use the lens and your budget. For small objects shot close up, you are generally talking about macro photography with lenses that allow very short minimum focus distances of only a few inches in most cases. Nikon gives their macro lenses a "micro" designation. At present, Nikon only offers four lenses with such a designation and the cheapest of them at $450 is their 60mm f/2.8D AF Micro Nikkor lens. This actually is a very good macro lens for your D40. The bad news is this lens will not autofocus on a D40 because D40s do not have a built-in autofocus motor like older and higher-end Nikon bodies such as the discontinued D70/70s or current D90. Thats not really a problem since most macro photography involves manual focus anyway.
The only Nikon lens meant for macro photography that will autofocus on a D40 at this time is the Micro-Nikkor 105mm f/2.8G ED-IF AF-S VR lens. This is also a very good lens but, you may find the 105mm focal length to be a bit too tight and depth of field will be practically non-existent. You can often use other lenses for macro photography but some lenses have fairly long minimum focusing distances that can make macro photography difficult at best.
Effectively cleans filmy residue at the microscopic level. Increases resolution and light transmission, restoring optics to their original performance level. Will not damage optical coatings. Also reduces dew formation.
Typhoon Optics Latitude Sunglasses, Black Frames With Horizon Gray Polarized Lenses . Sleek and lightweight polarized sunglasses offer 100% protection from damaging UV rays. Glare free lenses are made of virtually indestructible polycarbonate lenses. Horizon Gray lenses are a good choice for bright sunny days or large bodies of water. Horizon Gray lenses filter out all hazardous glare and softens intense light. Sunset Brown lenses are a good choice for variable light days and small bodies of water. They filter out hazardous glare and increase visual definition in low light. Limited lifetime warranty.
Typhoon Optics Harbor Sunglasses, Matte Black Frames With Horizon Gray Lenses . Sleek and lightweight polarized sunglasses offer 100% protection from damaging UV rays. Glare-free lenses are made of virtually indestructible polycarbonate lenses. Horizon Gray lenses are a good choice for bright sunny days or large bodies of water. Horizon Gray lenses filter out all hazardous glare and softens intense light. Polarized Polycarbonate lenses by SOLA Sunlens 100% UV-Protection Comfort-Fit Frame Geometry TR90 Grilamid Nylon Frame Lifetime Warranty
Typhoon Optics Cancun Sunglasses, Demi Frames With Sunset Brown Polarized Lenses . Sleek and lightweight polarized sunglasses offer 100% protection from damaging UV rays. Glare-free lenses are made of virtually indestructible polycarbonate. Optically correct Typhoon lenses are offered in two colors. Horizon Gray lenses are a good choice for bright, sunny days or large bodies of water filtering out hazardous reflected glare and softening intense light. Sunset Brown lenses are a good choice for variable light conditions and on small bodies of water. They filter out hazardous glare and increase visual definition in low light. Limited lifetime warranty.
Typhoon Optics Cancun Sunglasses, Black Frames With Horizon Gray Polarized Lenses . Sleek and lightweight polarized sunglasses offer 100% protection from damaging UV rays. Glare-free lenses are made of virtually indestructible polycarbonate. Optically correct Typhoon lenses are offered in two colors. Horizon Gray lenses are a good choice for bright, sunny days or large bodies of water filtering out hazardous reflected glare and softening intense light. Sunset Brown lenses are a good choice for variable light conditions and on small bodies of water. They filter out hazardous glare and increase visual definition in low light. Limited lifetime warranty.
Typhoon Optics Aloha Sunglasses, Black Frames With Horizon Gray Lenses . Typhoon Aloha has AquaView hydrophobic lenses that repel water and smudges as well as reflected glare and UV rays. The lightweight hand-finished Grilamid frames are super rugged and resist perspiration. Shatterproof and lightweight lenses provides visual clarity and optical comfort for watersports or freeway driving. UV400 protection from harmful rays. Microfiber pouch which doubles as lens cleaning cloth, included. Water, dirt and other foreign particles are constant obstructions to visual performance when you are engaging in any activity while wearing sunglasses. Typhoon s NEW AquaView Hydrophobic Polarized lens guards your vision against these elements while providing you with a superior, clear, clean field of vision. 100% UV-protection Polarized glare shield Unbreakable injected polycarbonate lenses Lifetime warranty
High Quality Content by WIKIPEDIA articles Xray optics is the branch of optics which manipulates Xrays instead of visible light. While lenses for visible light are made of a transparent material with an index of refraction substantially different from 1, there is no equivalent material for Xrays. The only methods of Xray manipulation, other than simple image modulation, are through reflection, diffraction and interference effects, or by combining a number of lenses into a compound refractive lens. The basic idea is to reflect a beam of Xrays from a surface and to measure the intensity of Xrays reflected in the specular direction (reflected angle equal to incident angle). It has been shown that a reflection off a parabolic mirror followed by a reflection off a hyperbolic mirror can lead to the focusing of Xrays. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 104 Publication Date: 2010/07/01 Language: English Dimensions: 5.98 x 9.01 x 0.24 inches
Typhoon Optics Mission Bay Sunglasses, Demi Frames With Sunset Brown Polarized Lenses . Sleek and lightweight polarized sunglasses offer 100% protection from damaging UV rays. Glare free lenses are made of virtually indestructible polycarbonate lenses. Horizon Gray lenses are a good choice for bright sunny days or large bodies of water. Horizon Gray lenses filter out all hazardous glare and softens intense light. Sunset Brown lenses are a good choice for variable light days and small bodies of water. They filter out hazardous glare and increase visual definition in low light. Limited lifetime warranty.
Typhoon Optics Latitude Polarized Sunglasses, Matte Gray Frames & Copper Rose Lenses . Sleek and lightweight polarized sunglasses offer 100% protection from damaging UV rays. Glare free lenses are made of virtually indestructible polycarbonate lenses. Horizon Gray lenses are a good choice for bright sunny days or large bodies of water. Horizon Gray lenses filter out all hazardous glare and softens intense light. Sunset Brown lenses are a good choice for variable light days and small bodies of water. They filter out hazardous glare and increase visual definition in low light. Limited lifetime warranty.
Typhoon Optics Mission Bay Sunglasses, Black Frames With Horizon Gray Polarized Lenses & . Sleek and lightweight polarized sunglasses offer 100% protection from damaging UV rays. Glare free lenses are made of virtually indestructible polycarbonate lenses. Horizon Gray lenses are a good choice for bright sunny days or large bodies of water. Horizon Gray lenses filter out all hazardous glare and softens intense light. Sunset Brown lenses are a good choice for variable light days and small bodies of water. They filter out hazardous glare and increase visual definition in low light. Limited lifetime warranty.
The popular optics review manual, Last-Minute Optics: A Concise Review of Optics, Refraction, and Contact Lenses, has been revised and updated into a Second Edition. This unique resource boils down the overwhelming subject matter of clinical optics and refraction, helping the ophthalmologist cover the essentials in a single review manual. The content is based upon the practical experience of two clinically active experts who lecture on ophthalmic optics around the world. This updated Second Edition by Drs. David G. Hunter and Constance E. West includes new questions added to selected chapters and a new chapter covering refractive surgery, as well as a key chapter that helps you evaluate patients with symptoms related directly to optical or refractive concerns. The complex concepts of optics are revealed in easy-to-understand explanations enhanced by simple illustrations. Last-Minute Optics, Second Edition allows you to test your knowledge while increasing your understanding of optics. Designed in a clear, concise, question-and-answer format, this book allows for self-assessment and a chance to test your understanding before you read the answer. Features of the Second Edition: • Written in a light and approachable style to make optics accessible and understandable • Unique question-and-answer format allows for self-assessment while studying to identify areas where more work is needed • Perfect for limited study time • Includes real-life examples that are clinically relevant • Numerous practical tips to help enhance clinical practice • Includes 223 questions and answers Whether you’re an ophthalmologist, ophthalmic technician, resident or student, reviewing the optics facts and concepts is easier with Last-Minute Optics: A Concise Review of Optics, Refraction, and Contact Lenses, Second Edition.
Typhoon Optics Mariner Ii Reader Sunglasses, Black Frames With Horizon Gray Polarized Lenses +1.5 . Don t call it a reading glass because it s really so much more. Typhoon s Mariner with AquaView II lenses features optical enhancement with three available magnification powers; +1.5, +2.0 and + 2.5. Its polarized polycarbonate lenses block 100% of harmful UV rays. The Hydrophobic coating keeps your view clear of water, dirt and other particles that can hinder your vision. Magnification powers: +1.5, +2.0 and +2.5 100% UV-protection Polarized glare shield Unbreakable injected polycarbonate lenses Limited lifetime warranty
Typhoon Optics Mariner Ii Reader Sunglasses, Black Frames With Horizon Gray Polarized Lenses +2.0 . Don t call it a reading glass because it s really so much more. Typhoon s Mariner with AquaView II lenses features optical enhancement with three available magnification powers; +1.5, +2.0 and + 2.5. Its polarized polycarbonate lenses block 100% of harmful UV rays. The Hydrophobic coating keeps your view clear of water, dirt and other particles that can hinder your vision. Magnification powers: +1.5, +2.0 and +2.5 100% UV-protection Polarized glare shield Unbreakable injected polycarbonate lenses Limited lifetime warranty
Typhoon Optics Mariner Ii Reader Sunglasses, Black Frames With Horizon Gray Polarized Lenses +2.5 . Don t call it a reading glass because it s really so much more. Typhoon s Mariner with AquaView II lenses features optical enhancement with three available magnification powers; +1.5, +2.0 and + 2.5. Its polarized polycarbonate lenses block 100% of harmful UV rays. The Hydrophobic coating keeps your view clear of water, dirt and other particles that can hinder your vision. Magnification powers: +1.5, +2.0 and +2.5 100% UV-protection Polarized glare shield Unbreakable injected polycarbonate lenses Limited lifetime warranty
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
This high-quality animated film details the structure and function of the human eye. It is chock full of diagrams from every angle, showing what structures the eye is made of, and the flow of light into the eye...
This insightful educational film explores the inner workings of the human eye, its care, and its diseases - plus somewhat graphic footage of eye injuries. The first part shows how eyes are used and how vision is discovered at the early stage of development of an infant...
PEC PADs are the ideal photo wipes for those who hate photowipes! Until PEC PADs came along, photowipes fell apart, left lint and scratched emulsions. PEC PADs are extremely strong, lint-free and so soft and pure it is almost impossible to scratch an emulsion with them...
The MJ-50 LED Lighted MagniFold from Carson Optical represents the latest in Handheld Magnifier design. Its rectangular lens is shaped for the way you naturally view things, and a collapsible handle locks into any of six different positions for the most comfortable alignment...
Jerky Spice - Original (6 Pack)Manufacture ID: BJ-6SKThe most popular jerky flavor Original has been a real hit! This six pack includes 6 Original Flavor Spice packs and 6 Cure packs so you can give it a try yourself!
Optical glass binocular magnification in a headset made of lightweight, durable, impact-resistant material. Headband is easily adjustable to fit any size. Can be tilted up when not needed. Wear with or without glasses.
The Backyard Safari™ Field Binoculars Are Standard Issue For Every Outdoor Enthusiast. The 5X30 Power Crystal Clear Optics Bring Nature Up Close In Crisp Detail. Adjustable, Rugged, And Waterproof, These Binocs Are The First Piece Of Equipment You Need In Your Collection Of Essential Field Gear...
MicroPro 48-piece Microscope Set 50x, 100x, 150x, 300x, and 600x magnifications With the GeoSafari MicroPro, young scientists can investigate everything from cells to crystals! Perfect for individual or classroom use, the glass eyepieces and power settings from 50x to 600x provide users with superior precision viewing...
Cleaner is specifically design to safely clean PS3 game systems10-brush plus pocket cylcone clean process includes 10 flexible brushes strategically placed in a cyclone formation for optimal cleaningIts unique Zero-Clearance technology allows each brush to retract into a pocket to prevent knocking the delicate optical lens out of alignmentPatent-pending system is especially important for Blu-ray players because the optics can be as close as 0...
Cleaner is specifically design to safely clean Xbox 360 game systems10-brush plus pocket cylcone clean process includes 10 flexible brushes strategically placed in a cyclone formation for optimal cleaningIts unique Zero-Clearance technology allows each brush to retract into a pocket to prevent knocking the delicate optical lens out of alignmentPatent-pending system is especially important for Blu-ray players because the optics can be as close as 0...
It is necessary if your system has the following symptoms:
System shows a message "Disc Read Errors" or disc appears damaged or dirty on the screen.
System reads certain games or movies.
System loads games or movies longer than normal...
Specially designed to remove dust from a CD and DVD player's lens, this laser lens cleaner contains six brushes to gently remove dust and dirt from your disc players' lens, and seven sound optimization tools for use with audio setup and designed to optimize the sound quality of your stereo system.
Night Owl NOB5X 5.0x NexGen Night Vision Binoculars with 50mm Lens
Tifosi Optics Lenses
My new antifog swimming goggles are all out of focus. Is there something wrong with the lenses?
These goggles are like really bad glasses. They magnify and distort objects. I'm not a glasses wearer. Perhaps there is something wrong with the optics?
Not much detail there, like the brand or anything, so not much to go on.
First question--are the lenses flat, or curved? Flat lenses will still be subject to refraction in water, but vision shouldn't be distorted as such (things will just look a little closer than they are). Curved lenses will definitely cause distortion though.
Secondly, this may be a dumb question, but you did already remove any protective plastic films from the lenses, didn't you? Of course you did.
Sorry, comments for this entry are closed at this time.
Sorry, comments for this entry are closed at this time.