A) at what two points between object and screen may a converging lens with a 3.00 cm focal lenght be placed to obtain an image on the screen?
B) what is the magnification of the image for each position of the lens?
The imaging equation is
1/do + 1/d1 = 1/f
f = 3.00 cm
d0 + di = 18.0 cm
Substitute for do:
1/(18.0 - di) + 1/di = 1/3.00
di + (18.0 - di) = di*(18.0 - di)/3
54 = 18.0*di - di²
di² - 18.0*di + 54 = 0
di = 3.8, 14.2
di = image distance, or the distance from lens to the screen.
So the lens may be placed 3.8 cm from the screen, or 14.2 cm from the screen.
If the lens in 3.8 cm from the screen, the magnification is di/do = 3.8/14.2 = 0.27
If the lens is 14.2 cm from the screen, the magnification is di/do 14.2/3.8 = 3.74
If you ski in Spy Optics Trevor goggles, a Spy Optics Trevor replacement lens is a wise investment. When the unexpected happens on the mountaina hard face plant or a deep scratch from a tree branchhaving a Spy Optics Trevor replacement lens in your bag of tricks insures your vision for the long term.
Fitting like a glove and ready to lead you into the fray, the Spy Optics Logan Sunglasses feature a sleek, dense propionate finish that is all business. With wraparound styling, these baby's go aerodynamic on a straight line cliff shot, bike trail bender, or during motor assisted access. An 8-base Arch lens maintains clear vision with a natural eye curved designed, while a gnarly tough and light Grilamid frame keeps you floating like a butterfly, so you wont get stung like a bee after a mega jump or anticipated crash landing. A built-in hinge system gives cool styling and a head hugging fit. Give 'em the love.
Optics-what type of lens set up do I need to view an object which is close up, whilst my eyes are at infinity?
The application is an in-helmet screen for displaying information to a motorcylcist. I want my eyes focussed at infinity since this would prove much safer than having to adjust my gaze every few seconds. A HUD is too complicated and expensive - a suitable lens to view a hacked mobile phone screen (say) would work really well. Any ideas?
A lens with a positive diopter, i.e. a convex lens. It sounds like you are sort of reinventing the bifocal with a different position for the reading lens.
Cooled Ccd Camera is a sony handycam CCD-TR87 a good camera?
is it considered a fairly good camera? it does use tapes instead of digital,which sucks,and it doesn't take pictures,only video,but otherwise seems pretty cool.how much is it worth?
That camera, is extremely old. Which gives it a value of about 50 dollars. Sorry kid.
Since its introduction in May of 2008, the Orion StarShoot Pro has sent shockwaves through the astro-imaging community, setting a new standard for price and performance. Now we’ve outdone ourselves again by improving the StarShoot Pro with refined features and functionality to provide the very best in affordable imaging technology. Our enhanced StarShoot Pro V2.0 brings cooled, multi-megapixel color imaging into the realm of never-before-seen affordability. Its Sony 6.1-megapixel color CCD chip boasts a 3032 x 2016 pixel array in a 23.4mm x 15.6mm format. That gives the Pro 6.5 times the image area and over four times the pixels as similarly priced astro CCD cameras. In fact, it uses the same chip found in cameras costing thousands more! The Pro's square 7.8 micron pixel size provides an excellent balance between high resolution and sensitivity. With some cameras in cooler weather conditions, condensation can form on the surface of the optical window, due to the temperature of the optical window being affected by the cooled CCD. Our enhanced design prevents this by virtue of increased distance between the CCD chip and the optical window. You get detail-rich shots with enough resolution to make large format color prints! For the intermediate or advanced astro-imager, or for beginners seeking a camera they won't soon outgrow, the enhanced Orion StarShoot Pro V2.0 delivers award-winning high-resolution performance for an unprecedented low price. Get yours today!
- SecurityMan hidden camera mirror- Color CCD camera surveillance kit- Excellent tool for discreet surveillance in convenience stores, buses, indoor ATMs and more- Do-it-yourself- Superb video image CCD color camera- Compact design mirror and easy install
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M13 & M57 Hypercam Road Test (Peltier Cooled Upgraded SPC900)
What does it mean if a digital camera does not have PicBridge?
ok, i thought this camera was such a cool camera and it has 10 mp and everything so i thought it was great. the only thing i noticed about it was that it did not have picbridge. What is that? what does it do? do i need picbridge for anything? I have a link to the camera.... scroll down on that page were it says specifications and it should say pictbridge, and then a ''no'' next to it. so tell me wahat to do, thanks!
Camera Nikon I am purchasing a Nikon camera and have questions about what type I need to purchases.?
The camera's primary use will be to capture photos of quick moving stingrays and fish in aquariums (without causing blurry photos). I am looking at the Nikon d3000. Is this good for the purpose I need? I am also wondering what I should be looking for? Does the camera need to have higher megapixles or less? Does the megapixles matter or just the lens? Any help would be great!
I order to photograph fish in an aquarium you are going to need at least one of three things.
High ISO
A bright Flash
A fast Lens
The D3000 only goes up to 1600 ISO, not nearly sensitive enough for a dark aquarium.
I moved over to the lenses page and it looks like all of the Standard lenses are f/1.4. Very fast. But they dont zoom, so lets move on.
This is better. http://www.nikonusa.com/Find-Your-Nikon/Product/Camera-Lenses/2164/AF-S-NIKKOR-24-70mm-f%252F2.8G-ED.html Its aperture is a little slower at 2.8 but it stays consistent to 70mm so you wont lose light when you zoom in for fish at the back of the tank. If thats too expensive, this one isnt as good, but might not leave dust in your wallet. http://www.nikonusa.com/Find-Your-Nikon/Product/Camera-Lenses/1929/AF-Zoom-NIKKOR-24-85mm-f%252F2.8-4D-IF.html
The flash that comes on your camera is dinky and wont do much good for anything, so if your aquarium allows flash, I'd go ahead and start looking for one here: http://www.nikonusa.com/Find-Your-Nikon/Flashes/index.page
9656 Belt Loop for convenient carrying Nikon - Coolpix P6000 Black Camera Carrying Case Digital Camera Case Leather Nikon Nikon Corporation www.nikon.com
11387 Zipper compartment offers protection Exterior pocket for accessories Black Camera Carrying Case Case for Camera Neoprene Nikon Nikon - COOLPIX L Series Nikon Corporation www.nikon.com
which brand is better for a digital camera nikon or cannon?
I have been using an old 35mm camera with a 50-200mm lens. I found that I enjoy taking photos and would like to pick it up as one of my hobbies. The problem with the 35mm camera is that you have to buy the film then pay to get them developed, and when you take a lot of pictures it becomes expensive. So I was wondering which digital camera brand is better Nikon or cannon
I would suggest to go with nikon.
Nikon F65 (N65) QD 35 mm SLR Camera Body in Black (Nikon F65 QD = N65 QD)
*Compact, lightweight design with fully automatic focus
*Ergonomic grip and camera controls fall naturally under your fingers
*Built tough with a durable metal lens mount for optical integrity
*Takes all of the guesswork out of fine photography
*Shoulder strap included
Color Wheel Lens Is it a good webcam specs? See details below:?
CIF (352 x 288) CMOS Sensor
Easy-Grip Focus Wheel with Close-Up to Infinity Viewing
Up To 30 Frames Per Second
24-Bit True Color
Auto Exposure/ White Balance/ Color Control
f/2.8 single plastic Lens
360º Swivel Base with +/- 20º Tilt
Standard 1/4" Tripod Mount
Store Files in JPG/ BMP/ AVI/ EXE
Super Bright On/Off LED Indicator
6-Foot USB 1.1 Cable
What can you say about the above specification of a Veo Stingray webcam?
I want to know if it has a good performance before buying it...
(I don't know how to choose a good webcam.)
Thanks...
LightForce modular filter are made from an extremely unique grade of Polycarbonate. LightForce modular filters are able to withstand harsh environments and direct impacts that literally leave our competitors cheap grade Polycarb in pieces. This same material is used in the new F-22 Raptor canopies plus all Ferrari visual engine covers. LightForce employs this material in both its lens and filter system based on its supreme lightweight stength scratch resistance and its ability to resist extreme heat conditions. Manufactured in a veriety of color temperatures and clarity filtering options LightForce filters offer you true lighting tunablity in your own lighting needs.
LightForce modular filter are made from an extremely unique grade of Polycarbonate. LightForce modular filters are able to withstand harsh environments and direct impacts that literally leave our competitors cheap grade Polycarb in pieces. This same material is used in the new F-22 Raptor canopies plus all Ferrari visual engine covers. LightForce employs this material in both its lens and filter system based on its supreme lightweight stength scratch resistance and its ability to resist extreme heat conditions. Manufactured in a veriety of color temperatures and clarity filtering options LightForce filters offer you true lighting tunablity in your own lighting needs.
LightForce modular filter are made from an extremely unique grade of Polycarbonate. LightForce modular filters are able to withstand harsh environments and direct impacts that literally leave our competitors cheap grade Polycarb in pieces. This same material is used in the new F-22 Raptor canopies plus all Ferrari visual engine covers. LightForce employs this material in both its lens and filter system based on its supreme lightweight stength scratch resistance and its ability to resist extreme heat conditions. Manufactured in a veriety of color temperatures and clarity filtering options LightForce filters offer you true lighting tunablity in your own lighting needs.
LightForce modular filter are made from an extremely unique grade of Polycarbonate. LightForce modular filters are able to withstand harsh environments and direct impacts that literally leave our competitors cheap grade Polycarb in pieces. This same material is used in the new F-22 Raptor canopies plus all Ferrari visual engine covers. LightForce employs this material in both its lens and filter system based on its supreme lightweight stength scratch resistance and its ability to resist extreme heat conditions. Manufactured in a veriety of color temperatures and clarity filtering options LightForce filters offer you true lighting tunablity in your own lighting needs.
LightForce modular filter are made from an extremely unique grade of Polycarbonate. LightForce modular filters are able to withstand harsh environments and direct impacts that literally leave our competitors cheap grade Polycarb in pieces. This same material is used in the new F-22 Raptor canopies plus all Ferrari visual engine covers. LightForce employs this material in both its lens and filter system based on its supreme lightweight stength scratch resistance and its ability to resist extreme heat conditions. Manufactured in a veriety of color temperatures and clarity filtering options LightForce filters offer you true lighting tunablity in your own lighting needs.
LightForce modular filter are made from an extremely unique grade of Polycarbonate. LightForce modular filters are able to withstand harsh environments and direct impacts that literally leave our competitors cheap grade Polycarb in pieces. This same material is used in the new F-22 Raptor canopies plus all Ferrari visual engine covers. LightForce employs this material in both its lens and filter system based on its supreme lightweight stength scratch resistance and its ability to resist extreme heat conditions. Manufactured in a veriety of color temperatures and clarity filtering options LightForce filters offer you true lighting tunablity in your own lighting needs.
LightForce modular filter are made from an extremely unique grade of Polycarbonate. LightForce modular filters are able to withstand harsh environments and direct impacts that literally leave our competitors cheap grade Polycarb in pieces. This same material is used in the new F-22 Raptor canopies plus all Ferrari visual engine covers. LightForce employs this material in both its lens and filter system based on its supreme lightweight stength scratch resistance and its ability to resist extreme heat conditions. Manufactured in a veriety of color temperatures and clarity filtering options LightForce filters offer you true lighting tunablity in your own lighting needs.
LightForce modular filter are made from an extremely unique grade of Polycarbonate. LightForce modular filters are able to withstand harsh environments and direct impacts that literally leave our competitors cheap grade Polycarb in pieces. This same material is used in the new F-22 Raptor canopies plus all Ferrari visual engine covers. LightForce employs this material in both its lens and filter system based on its supreme lightweight stength scratch resistance and its ability to resist extreme heat conditions. Manufactured in a veriety of color temperatures and clarity filtering options LightForce filters offer you true lighting tunablity in your own lighting needs.
LightForce modular filter are made from an extremely unique grade of Polycarbonate. LightForce modular filters are able to withstand harsh environments and direct impacts that literally leave our competitors cheap grade Polycarb in pieces. This same material is used in the new F-22 Raptor canopies plus all Ferrari visual engine covers. LightForce employs this material in both its lens and filter system based on its supreme lightweight stength scratch resistance and its ability to resist extreme heat conditions. Manufactured in a veriety of color temperatures and clarity filtering options LightForce filters offer you true lighting tunablity in your own lighting needs.
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GEO Tri-color Circle Lens in Grey and Green, Super Nudy Lens in Brown
Optics Mount Will a Real Steel AK47 Scope Mount Fit on My Airsoft Echo 1 Red Star Akm?
ok i have an echo 1 red star akm and it is more convinet for me to acquire a real steel ak scope mount, will it fit? im taking about the mount thatclamps on to the side of the ak and give s you about 6 inches of picatinny space on the top to mount optics.
thanks
For the most part airsoft guns are made to be 1:1 scale replicas. And I know that Echo1 follows that guideline. So yes it should fit.
Rugged mounting solution for side mount equipped Kalashnikov type rifles Allows cowitness of iron sights Rifle can be field stripped w/o removing optic Lightweight (under 6oz) CNC machined aircraft grade 60661-t6 aluminum Positions 30mm optics in co-witness location Nearly .25" of side to side adjustment to ensure cowitness With adjustment optic can be placed directly over bore Steel locking lever retains zero Blind pin machined into mount allows user to permanently set position after zeroing Includes scope ring for 30mm optics such as Aimpoint M-Series Will require fitting as needed Mfg: Rs Products Llc
Transform your optics into a whole new experience with the Universal Tripod Kit. The kit provides stable viewing anywhere using the window mount or the arm stabilization pad paired with the tabletop tripod. It is a true Yukon product by providing three products in one. The kit comes with a tabletop tripod and window mount, which can be purchased separately from the kit, and an arm stabilization pad, which is only available in the kit. The Universal Tripod Kit makes an excellent gift for the outdoor enthusiast. Uses: Hunting Photography Camping Hiking Nature Observation Features: Image Stability Made of Sturdy Aluminum Alloy Lightweight Compact Durable Versatile
Car Window Mount Extremely handy. A perfect mount for your spotting scopes or binoculars. Ideal for observation from the comfort of your car. Measurements:. Length: 11.125. Width: 3.375. Height: 3.875
One-piece integral base and rings designed for traditional optics or similar sights that require two 30mm rings for additional support. Available in three different lengths for proper eye relief adjustment. AD-Scout-S is standard length for mounting traditional optics. AD-Scout Cantilever positions optics farther forward to provide 1½" of extra space at the rear for mounting night-vision devices or when additional eye-relief is needed. AD-Scout-X uses the same great cantilever design as the AD-Scout Cantilever but position’s optics 2½" farther forward for maximum room at the rear for mounting night-vision devices or making eye-relief adjustments. Mfg: American Defense SPECS: 6061 T6 aluminum hardcoat T3 mil-spec anodized matte black. Height measured from top of rail to bottom of scope body - .87” (2.2cm) high. Distance between rings - 2½” (6.3cm.) high. 7.1 ounces (201g) weight. AD-Scout - S - 4½” (11.4 cm) OAL. AD-Scout Cantilever - 6” (15.2cm) OAL. AD-Scout -
One-piece integral base and rings designed for traditional optics or similar sights that require two 30mm rings for additional support. Available in three different lengths for proper eye relief adjustment. AD-Scout-S is standard length for mounting traditional optics. AD-Scout Cantilever positions optics farther forward to provide 1½" of extra space at the rear for mounting night-vision devices or when additional eye-relief is needed. AD-Scout-X uses the same great cantilever design as the AD-Scout Cantilever but position’s optics 2½" farther forward for maximum room at the rear for mounting night-vision devices or making eye-relief adjustments. Mfg: American Defense SPECS: 6061 T6 aluminum hardcoat T3 mil-spec anodized matte black. Height measured from top of rail to bottom of scope body - .87” (2.2cm) high. Distance between rings - 2½” (6.3cm.) high. 7.1 ounces (201g) weight. AD-Scout - S - 4½” (11.4 cm) OAL. AD-Scout Cantilever - 6” (15.2cm) OAL. AD-Scout -
One-piece integral base and rings designed for traditional optics or similar sights that require two 30mm rings for additional support. Available in three different lengths for proper eye relief adjustment. AD-Scout-S is standard length for mounting traditional optics. AD-Scout Cantilever positions optics farther forward to provide 1½" of extra space at the rear for mounting night-vision devices or when additional eye-relief is needed. AD-Scout-X uses the same great cantilever design as the AD-Scout Cantilever but position’s optics 2½" farther forward for maximum room at the rear for mounting night-vision devices or making eye-relief adjustments. Mfg: American Defense SPECS: 6061 T6 aluminum hardcoat T3 mil-spec anodized matte black. Height measured from top of rail to bottom of scope body - .87” (2.2cm) high. Distance between rings - 2½” (6.3cm.) high. 7.1 ounces (201g) weight. AD-Scout - S - 4½” (11.4 cm) OAL. AD-Scout Cantilever - 6” (15.2cm) OAL. AD-Scout -
One-piece integral base and rings designed for traditional optics or similar sights that require two, 30mm rings for additional support. Available in three different lengths for proper eye relief adjustment. AD-Scout-S is standard length for mounting traditional optics. AD-Scout Cantilever positions optics farther forward to provide 1½" of extra space at the rear for mounting night-vision devices or when additional eye-relief is needed. AD-Scout-X uses the same great cantilever design as the AD-Scout Cantilever, but position’s optics 2½" farther forward for maximum room at the rear for mounting night-vision devices or making eye-relief adjustments. SPECS: 6061 T6 aluminum, hardcoat T3 mil-spec anodized, matte black. Height measured from top of rail to bottom of scope body - .87” (2.2cm) high. Distance between rings - 2½” (6.3cm.) high. 7.1 ounces (201g) weight. AD-Scout - S - 4½” (11.4 cm) OAL. AD-Scout Cantilever - 6” (15.2cm) OAL. AD-Scou
One-piece integral base and rings designed for traditional optics or similar sights that require two, 30mm rings for additional support. Available in three different lengths for proper eye relief adjustment. AD-Scout-S is standard length for mounting traditional optics. AD-Scout Cantilever positions optics farther forward to provide 1½" of extra space at the rear for mounting night-vision devices or when additional eye-relief is needed. AD-Scout-X uses the same great cantilever design as the AD-Scout Cantilever, but position’s optics 2½" farther forward for maximum room at the rear for mounting night-vision devices or making eye-relief adjustments. SPECS: 6061 T6 aluminum, hardcoat T3 mil-spec anodized, matte black. Height measured from top of rail to bottom of scope body - .87” (2.2cm) high. Distance between rings - 2½” (6.3cm.) high. 7.1 ounces (201g) weight. AD-Scout - S - 4½” (11.4 cm) OAL. AD-Scout Cantilever - 6” (15.2cm) OAL. AD-Scou
