It is ideal for use on volk lenses, microscope eyepieces, cameras and other precision optical surfaces. Ensure you get the highest quality lenses to deliver the highest resolution, distortionfree imaging. I was surfing on ebay, and i saw these cheap tele converters. Jan 07, 2016 volk double aspheric lens introduction volk s 60d,78d and 90d fundus lenses have establishes slit lamp indirect ophthalmoscopy as a standard diagnostic procedure for comprehensive fundus evaluation. Each lens comes in a sterile pouch and is supplied in quantities of 10 per box. Home lenses slit lamp lenses volk 78d slit lamp lens. The vsfnc lens is designed for diagnostic use and vdisfnc is designed for use with the argon diode laser. There has been considerable emphasis on the need for pupil dilation eg it is. Question about these 2x3x4x tele converter lenses dec 11, 2009 hi.
Is said to not fit to many other zuiko lenses, through mechanical differences. Examination of the retina by slit lamp and volk double aspheric lenses is called a bio microscopic indirect ophthalmoscope bio. Get a multilens case free of charge if you are placing an order for a new volk lens. For decades, volk optical has provided discerning practitioners with the finest lenses for visualization and treatment of the eye. Volks digital lenses are the latest generation non contact lenses for examination at the slit lamp and bio. Mar 22, 2014 a short video using a digital camera attachemnt and volk lens slitlamp biomicroscopy. The volk 20d acs lens is an industry standard general diagnostic lens. Volk is known worldwide as the premier designer and manufacturer of the highest quality ophthalmic lenses. Ditch the chocolate this valentines day and opt for something more unique. Indirect bio lenses 16 slit lamp lenses 11 indirect contact laser lenses 14 direct contact laser lenses 17 special treatment lenses 5 gonio lenses 9 volk retinal imaging camera 1 lens accessories 3 price. Lenses clean and dry instantly, completely free of smudges, haze, lint and water spots, restoring light transmission to maximum levels for optimum. In the 70s pentax made a monocular converter k which did just what you were asking. Volk1 single use lenses aim to reduce the potential for transmission of infectious disease while eliminating reprocessing costs sterilization patented double aspheric optics provide enhanced imaging of the optic disc and macula. Our striking pink lenses are the perfect addition to any collection.
Volk is a company that produces these lenses, and such is the popularity of the manufacturer that fundus biomicroscopy lenses are now commonly referred to as volk lenses. The digital series are the 3rd generation, double aspheric, noncontact slit lamp lenses. High magnification provides excellent views of the optic disc and macula. Volk lens cleaning cloth pack of 24 highly absorbant, lintfree optical towelette moistened with oil removers and cleaning agents. When cleaning lenses, a good practice is to rinse under tap water to remove particulate which can scratch the lens coating and glass. By way of example using the table below, if a 60d lens were used to measure the size of the optic disc and the measurement made was 1. Volk double aspheric lens introduction volks 60d,78d and 90d fundus lenses have establishes slit lamp indirect ophthalmoscopy as a standard diagnostic procedure for comprehensive fundus evaluation.
Quality of volk manufactured optics deliver highresolution images in a sterile, onetimeuse design. Volks doubleaspheric lenses eliminate more distortion for better overall imaging. Where can we buy cheap and good lenses student doctor network. Let them do the choosing with a volk gift certificate. All your needs from consulting room equipment to vision testing disposables and magnification solutions, designs for vision can help. Where can we buy cheap and good lenses student doctor. Digital slit lamp lenses volk indirect aspherical slit lamp lens primary application. This will extend the range of your pen to take stunning pictures with impressive detail and interesting perspectives. Im not sure about the superfield, but i recently purchased the digital widefield and digital clearfield bio lenses and have some opinions on each.
The older nikon teleconverter works well with all of my lenses that have an aperture ring that can be set manually. Over time, indirect ophthalmoscopy has come to replace the previously widespread use of direct ophthalmoscopy, and with good reason. A mild detergent and water is ideal to clean the surface. The image below represents an actual side by side comparison of a volk 20d lens compared with a nonvolk lens over a 2mm grid. I have a zuiko 70300 lens and im wondering that could these glasses be useable with this lens. Volk precision optical lens cleaner wipes are highly absorbent, lintfree optical towelettes moistened to an exact saturation level with a unique combination of oil removers and cleaning agents. Volk diagnostic lenses volk 25d bio lens designs for vision is a specialist provider of products to the ophthalmic and optometry sector for over 40 years. Digital clear field indirect bio lens for highest resolution pan retinal examination. The following image shows all five nikon lens converters. Do not use micro fiber clothes as they will remove. Digital widefield lens any advice would be helpful. Sep 15, 2005 newer noncontact lenses, such as the digital wide field volk and the digital 1. I once had a tamron version that worked with their adaptall2.
K301110 fundus this lens was designed to provide a central 0. Buy online and choose from a range of cameras free delivery on orders over 50 pounds. A slit lamp is an instrument consisting of a highintensity light source that can be focused to shine a thin sheet of light into the eye. The products represented on this page represent the best in class for each of our product categories.
Quality of volkmanufactured optics deliver highresolution images in a sterile, onetimeuse design. It is important to know the magnification factors for condensing slitlamp lenses because this allows. The image below represents an actual side by side comparison of a volk 20d lens compared with a non volk lens over a 2mm grid. In the volk spirit of improvement, our 2nd generation, digital series bio lenses were developed from the classic, 1st generation bio lenses, in a similar fashion to volk s digital series slit lamp lenses using computeraided optical design, improved glass materials, and enhanced antireflective coatings. Jan 10, 2012 photochromic dynamics of ophthalmic lenses article pdf available in applied optics 512. They are now quite rare almost impossible to find and when one comes up on ebay you have to snipe to even have a chance. Newer noncontact lenses, such as the digital wide field volk and the digital 1. Cleaning in a counter clock wise direction may loosen the glass element from the ring. Vmlcase keep your personal lens sets together with our multilens case. The volk lens is a positive lens and the aerial image is therefore inverted and laterally reversed and is located between the back of the lens and the slit lamp.
Be it the microscope, a camera or a lens, it has to do with quality of the optics. My nikon 1870 zoom lens no aperture ring will take an exposure although the image will be severely underexposed, presumably related to the lack of an electrical connection to allow proper aperture control. Lens converters gain versatility from your existing olympus lenses by using a lens adaptor. Volk enhanced their double aspheric designs further with advanced computer modeling. Also, gains in the quality of the ar coating provided a noticeable reduction in glare and reflections. They employ improved designs, coupled with superior materials and coatings for the highest resolution imaging of any non contact lenses. The diopter value of a lens is a unit of refractive power of an optical lens, and is denoted by the inverse of the focal length of the lens. Ive been impressed over the years with the quality of volk optics, both diagnostic and therapeutic lenses. Teleconverters, as opposed to closeup lenses and typical camera lenses, are negative powered lenses. Ocular instruments has no affiliation with volk optical and provides product statistics from published literature for informational purposes only. Fundus biomicroscopy lenses are probably the most important tool that the majority of optometrists have at their disposal to screen and diagnose posterior eye pathology. I would recommend the 28 d lens, you can get farther to the periphery. Find low everyday prices and buy online for delivery or instore pickup.
Volk lenses all volk lenses are manufactured from highgrade glass material. Shop ophthalmic lenses 30 diopter volk lens small shopping cart log in or register contact us 89752020 toll free 8005215257 mailing list. Lenses clean and dry instantly, completely free from smudges, lint and water spots. The volk 78d slit lamp lens features symmetrical double aspheric optical design which can be held with either surface facing the patient. Maxlight cr39 lenses are impact, chip and fracture resistant and are up to 44% lighter than comparable glass lenses. Volk product maximum spot size microns product maximum spot size microns omraprp165 275 super quad 200 omrawf 400 quadraspheric3 200. Searching for the perfect gift for the recent graduate or doctor in your life.
Volk s digital lenses are the latest generation non contact lenses for examination at the slit lamp and bio. Volk digital wide field lens bib ophthalmic instruments. Volk digital wide field lens slit lamp lenses volk. The first aspheric indirect ophthalmoscopy lens was. Coloured lens available on request, delivery 3 to 4 weeks. These are manual lenses such as spotting scopes and telescopes. Teleconverters reduce the amount of light transmitted to the film or image sensorby 1 stop for a 1. All lenses have a custom antireflection coating and can be used with the appropriate therapeutic lasers. For a limited time only, choose from our timeless classics. I need to get volk lenses for lab and i was wondering if you guys could help me out. Volk diagnostic lenses volk 30d bio lens designs for vision is a specialist provider of products to the ophthalmic and optometry sector for over 40 years. Ocular instruments 1, 2 volk3 product specification ranges differences ezview 15d 14d 15d magnification 4. Australian and new zealand distributors for all optometric and opthalmic supplies and equipment.
Perfectly corrected for field curvature, astigmatism, aberrations and coma. Doctors call it the super 90 the volk super field nc slit lamp lens delivers the same magnification as your 90 diopter lens, but with higher resolution and up to a 26 degree larger field of view. Volk optical introduced the 60d lens in the early 1980s and, in subsequent years, extended the range of lenses for the slit lamp by adding additional powers. Retina lens competitive comparison chart more ocular instruments advantages safer due to our superior optical design, we can use a larger spot size setting with our lens designs than volk. The indirect ophthalmoscopy lenses and the slit lamp biomicroscopy lenses are designed following a patented double aspheric design. Also, a noncontact ruby lens provides a view that is neither reversed nor inverted. In some articles a lot of emphasis has been placed on the fact the image is laterally reversed and inverted. Classic slit lamp lenses volk indirect aspherical slit lamp lens primary application. All volk lenses are optically engineered using proprietary computer ray tracing. Lens converters lens accessories accessories olympus. Nikon manufactures five lens converters for modifying the oncamera focal length.
Dec 11, 2009 the main problem i found with them on zoom lenses was very bad chromatic aberration, and exaggeration of the lenses faults for example, if its soft wide open, the telelens will make it much worse. These lenses offer unmatched imaging, focusing capability, and minimal glare for retinal and anterior segment examinations and laser treatments. Volk 78 diopter slit lamp indirect ophthalmoscopy lens. Using a global network, designs for vision provides diagnostic and surgical products to a range of customers spanning across the healthcare sector. Lenses clean and dry instantly, completely free from smudges, haze, lint and water spots, restoring light transmission to maximum levels for optimum lens performance. When you add a converter, the amount of light your camera sensor receives is reduced. There has been considerable emphasis on the need for pupil dilation eg it is necessary to dilate with appropriate. Use fundus contact lenses if you suspect subtle thickening or edema. Gain versatility from your existing olympus lenses by using a lens adaptor.
Accessories and other items can also be purchased by phone if you prefer. The lamp facilitates an examination of the anterior segment and posterior segment of the human eye, which includes the eyelid, sclera, conjunctiva, iris, natural crystalline lens, and cornea. Unfortunately, however, there still seems to be a general impression that volk lenses are to be regarded as a special technique, unsuitable for more routine optometric work. Clean your lens one side at a time in a clock wise direction. The super series lenses are volk s 2nd generation slit lamp lenses consisting of four lenses designed to deliver either wider field or higher magnification imaging than volk s classic series lenses. Which of the following lens do you guys recommend and why. Addon and converter lenses are camera accessories that often get lost in the shuffle. If you add one to a gardenvariety camera lens you effectively create a telephoto lens out of the two, positive on the front lens and negative teleconverter in the rear. I know that the quality wont be fantastic but if anybody have some experience in this it would be a big help for me. To make a telephone order, or to discuss any item purchase please call 01438 740823. The view compared to the 90d is smaller image detail, but a. Although an adapter may have a lens, its not the same as camera addon lenses that screw onto the front of existing lenses to change their focal length. In the volk spirit of improvement, our 2nd generation, digital series bio lenses were developed from the classic, 1st generation bio lenses, in a similar fashion to volks digital series slit lamp lenses using computeraided optical design, improved glass materials, and enhanced antireflective coatings. Its easy to identify the need for an extra memory card, a camera case, an extra battery, a dedicated flash or in the case of an slr, an additional lens or three as addon options for your camera.
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