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1072 pages

Clinical Contact Lens Practice

Creator: Edward S. Bennett, Barry A. Weissman | Medical - 2005

contact lens prescription and the resultant spherocylindrical overrefraction automatically compensated for lens rotation. ... of Crossed After LARS Lens Rotation Aligns at Axis Overrefraction Cylinder Result Compensation 0° 180 Plano Pl -2.00 ...

Publisher: Lippincott Williams & Wilkins

About this book
This comprehensive text and reference addresses the full scope of contemporary contact lens science and practice. With two expert editors and 100 first-rate contributors, the book presents practitioners and students in optometry and ophthalmology with key facts on corneal anatomy, recent research, contact lens design, patient evaluation, clinical applications, patient education, and complications of contact lens wear. More than 600 illustrations complement the text. Clinical Contact Lens Practice will be the standard text for required contact lens courses and will be an invaluable everyday reference for practitioners.



58 pages

Catalogue of the Diatomaceæ, With References to the Various Published Descriptions and Figures

Creator: Frederick Habirshaw | Fragilariaceae - 1882

70, pl. 1. fig. 31; Prit. p. 884; H. L. Smith, Lens, p. 75, No. 25, pl. 2, fig. 3; Schm., Atl . pl. 26, fig. 50. PoRCELLUs, Kitton. Schm., Atl. pl. 26, fig. 25; pl. 39, figs. 15– 17. A. Mova-Caledonia, Grun. - PROBoscIDEA, Greg., D. C. p. 54, pl. 6, fig. 98; Rab.



421 pages

The Camera Assistant, A Complete Professional Handbook

Creator: Douglas Hart | Performing Arts - 2015-03-05

Figure 7-3 Arriflex Lens Mount. Arriflex has had three mounts in their history; the Standard mount is pretty much gone except for some elderly, privately owned cameras and lenses; the Bayonet is being phased out in favor of the PL mount in  ...

Publisher: CRC Press

About this book
Veteran camera assistant Doug Hart describes in this comprehensive technical guide all of the important facets and duties of the first and second camera assistants' jobs. Whether it is feature films, episodic television, documentaries, commercials, or music videos, The Camera Assistant: A Complete Professional Handbook explains both the practice and theory behind it with a concentration on technique rather than equipment. In addition, personal anecdotes from the author's years behind and beside the camera provide insight into this demanding field. Key topics include film formats and aspect ratios, testing lenses and camera equipment, focus theory, film loading and labeling, scene blocking, marking actors, shooting tips, slating, paperwork, equipment maintenance, set etiquette, and finding work. This is not a camera equipment handbook; it is a comprehensive procedures manual which describes and explains the most important responsibilities of the camera assistant on the set, the theory behind the practice, and the methods that get the job done properly and keep the assistant frequently employed. Douglas C. Hart has been a freelance first-camera assistant on feature films, documentaries, television shows, and commercials for more than 20 years, including 10 years (and 10 films) as first-camera assistant to Gordon Willis, ASC, as well as work in 42 states and 26 foreign countries. His work includes Presumed Innocent, Hannah and Her Sisters, The Cosby Mysteries, and CBS's Central Park West. He is a member and former president of the International Photographers Local 644, IATSE, and teaches the Camera Assistant Workshops at the International Film and Television Workshops in Rockport, Maine.


Lenses and Filters Directory

Arri PL - Wikipedia
Arri PL is a lens mount developed by Arri for use with both 16 mm and 35 mm movie cameras. The PL stands for "positive lock". It is the successor mount to the Arri ...

Lens.pl - Centrum Optyki Zeiss
Salon Optyczny Zeiss ... Bądź na bieżąco z promocjami i nowościami w sklepie. Podaj swój e-mail:

LENS MOUNTS in the RED Digital Cinema Store
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Lens mount - Wikipedia
A lens mount is an interface — mechanical and often also electrical — between a photographic camera body and a lens. It is confined to cameras where the body ...

Buy Contact Lenses at AC Lens. Order Contacts Online. Free ...
Buy contact lenses online from AC Lens for fast, convenient service. We carry the widest selection of lenses and offer expedited shipping for all your contact lens needs.


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Editor's picks


  • Elite Brands Inc

    Rokinon Xeen XN50-PL 50mm T1.5 Professional CINE Lens for PL Mount

    Photography (Elite Brands Inc)

    Rating (2 reviews):
    (5.0/5)
    Elite Brands Inc

    Identical in feel to a Zeiss CP.2

    I am a professional cinematographer and have used lenses with values into the six figures. I know what a quality lens looks and feels like. This lens feels like a Zeiss CP.2. In fact, it seems to be an exact clone. The only difference is Rokinon doesn't advertise these as being interchangeable lens mounts but from looking at it it seems like you could change the mount just like on a CP.2 if you had a lens mount kit.Anyway, the focus and iris barrels feel very smooth. Not too firm and not too loose. Again, almost identical in feel to a Zeiss CP.2.Another aspect of a good cinema lens is calibration of the focus and t stop scales. While I haven't had a chance to check the focus scales I did check the T stops and compared them against my Canon 50mm 1.2L. Wide open at F1.2, the Canon is about a stop brighter than the Xeen at T1.5, which is to be expected. Once you stop down to T2 and beyond the exposure levels match up perfectly to the same F stop on the Canon... 5/5 aroundlsu - See all my reviews Verified Purchase(What's this?) This review is from: Rokinon Xeen XN50-C 50mm T1.5 Professional Cine Lens for Canon EF (Electronics) I am a professional cinematographer and have used lenses with values into the six figures. I know what a quality lens looks and feels like. This lens feels like a Zeiss CP.2. In fact, it seems to be an exact clone. The only difference is Rokinon doesn't advertise these as being interchangeable lens mounts but from looking at it it seems like you could change the mount just like on a CP.2 if you had a lens mount kit.Anyway, the focus and iris barrels feel very smooth. Not too firm and not too loose. Again, almost identical in feel to a Zeiss CP.2.Another aspect of a good cinema lens is calibration of the focus and t stop scales. While I haven't had a chance to check the focus scales I did check the T stops and compared them against my Canon 50mm 1.2L. Wide open at F1.2, the Canon is about a stop brighter than the Xeen at T1.5, which is to be expected. Once you stop down to T2 and beyond the exposure levels match up perfectly to the same F stop on the Canon... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , December 20, 2015

    Incredible Lenses

    5/5 Gery Teague - See all my reviews, December 28, 2015
    List Price: $2,495.00
    Angle of view 28.4⁰ on full frame cameras; 18.7⁰ on APS-C cameras; 19.0⁰ on Super 35 cameras & 14.4⁰ on MFT cameras
    Features an aluminum body for increased durability, a tripod mount, large & easy to read markings, and a long focus throw (200 Degree)
    weighs only 2.7  lbs.
    Unified focus, aperture gear and T-stop scale positions  among all Xeen by Rokinon lenses
    Xeen by Rokinon lenses all have a 11 bladed diaphragm & unified 114mm front diameters for use with standard matte boxes



  • Rokinon

    3-Lens Xeen T1.5 PL Mount Set (24mm, 50mm & 85mm)

    Photography (Rokinon)
    List Price: $7,250.00
    Price: $7,249.00
    You Save: $1.00 (%)

    Metal Body
    11 Bladed Diaphragm
    3 Year Limited Warranty
    Full Frame Coverage
    6K Ready



  • AUKEY

    AUKEY Ora iPhone Lens, 3x Optical Zoom Clip-on Telephoto Cell Phone Camera Lenses for Samsung, Android Smartphones, iPhone

    Photography (AUKEY)
    List Price: $34.99

    Easily affix the 3x Telephoto Lens with perfect alignment to any mobile devices with the included clip
    Detachable soft rubber clip is easy to adjust and won't leave any scratches or marks on your mobile device
    Crafted with aluminum alloy and multi-element coated glass to minimize ghosting, reflections, lens flare, and other artifacts
    Optic Pro 3x Telephoto Lens ideal for capturing sports events, group shots, and distant subjects 3x closer
    Package Contents: AUKEY PL-BL02 Optic Pro 3x Telephoto Lens, Lens Clip, Carrying Pouch, Cleaning Cloth, 24 Month Warranty


  • AUKEY

    AUKEY Optic iPhone Camera Lens, 198° Fisheye Lens + 0.44x 150° Wide Angle + 15x Macro Mini Clip-on Cell Phone Camera Lenses Kit for Samsung, Android Smartphones

    Photography (AUKEY)

    Rating (143 reviews):
    (3.8/5)
    AUKEY

    Lenses are smaller than they look - case will fit easily into your pocket or purse

    5/5 Mary of Troy (SE Michigan) - See all my reviews Verified Purchase(What's this?) This review is from: AUKEY Optic iPhone Camera Lens, 198° Fisheye Lens + 0.44x 150° Wide Angle + 15x Macro Mini Clip-on Cell Phone Camera Lenses Kit for Samsung, Android Smartphones (Electronics) Just got these lenses for my husband's Samsung Galaxy Note 4. He bought a DSLR camera last fall for our 3-mos. stay in FL, plus our first cruise, but he didn't like carrying that bulky thing around. So, these petite lenses should be just the trick. First of all, they are a lot smaller than they look - the fisheye is the largest and is about the size of a quarter. The wide-angle+macro lenses are screwed together, and about the size of a nickle.The case is only about 3-1/2x5". It will easily fit in a pants' pocket. As far as quality, they seem well-made. I took a few before 'n after photos with each lense. I'm not overly excited by the wide-angle yet, but I just took the photos form my front sidewalk., April 12, 2016

    Great (not perfect) simple lens set for fun pics with your phone.

    This works well for some quick and easy wide angle, macro, or fisheye shots with your phone. I use mine on an iPhone 6S Plus. The clip is longer than in other sets but that actually makes it easier to handle. Since you have to adjust it to get the lens just right over your camera lens, the longer clip give you more leverage to do so. It comes with three lenses. It should be noted that the wide angle lens screws into the macro lens which then screws into the clip--you can't use the wide angle lens alone. This is only a pain if you think you're going to be switching quickly between wide angle and macro, but since the two are polar opposites, that's unlikely to happen. The effect quality is good with all three lenses, although I do wish the wide angle was a bit more wide. Overall, a great way to take some fun and different pictures with your phone.PROS:--Inexpensive--Easy to use--Works on any phoneCONS:--Have to get it over camera... 4/5 Frank V (LA, CA) - See all my reviews Verified Purchase(What's this?) This review is from: AUKEY Optic iPhone Camera Lens, 198° Fisheye Lens + 0.44x 150° Wide Angle + 15x Macro Mini Clip-on Cell Phone Camera Lenses Kit for Samsung, Android Smartphones (Electronics) This works well for some quick and easy wide angle, macro, or fisheye shots with your phone. I use mine on an iPhone 6S Plus. The clip is longer than in other sets but that actually makes it easier to handle. Since you have to adjust it to get the lens just right over your camera lens, the longer clip give you more leverage to do so. It comes with three lenses. It should be noted that the wide angle lens screws into the macro lens which then screws into the clip--you can't use the wide angle lens alone. This is only a pain if you think you're going to be switching quickly between wide angle and macro, but since the two are polar opposites, that's unlikely to happen. The effect quality is good with all three lenses, although I do wish the wide angle was a bit more wide. Overall, a great way to take some fun and different pictures with your phone.PROS:--Inexpensive--Easy to use--Works on any phoneCONS:--Have to get it over camera... Read more, July 20, 2016

    Awesome set of lenses!

    Aukey lenses comes with hard case, additional carry pouch, mini lens cloth, a clip for the hard case (in which to clip it onto a backpack or purse), all 3 lenses and clip for the lenses. Lenses screw on. They seem to be good quality. The macro and wide angle lenses come together as one, and twist apart to separate them in order to use the macro lens by itself.Fish eye lens came with a scratch on the back side of the lens. It doesn't seem to cause any differences and cannot see it in the photos.It appears that the front of the lenses have a lens cap to protect them from scratches, but the backside does not. I can see where that can easily get dirty and get scratches.Lenses are small. Dropped easily as they have no grip.Just to note, you have to get up really, really close with the macro lens. Like 1-2 inches away from the subject you're capturing.Overall I'm very pleased with these lenses. I'm excited to venture out this summer and collect new images using... 4/5 Michelle (Washington) - See all my reviews Verified Purchase(What's this?) This review is from: AUKEY Optic iPhone Camera Lens, 198° Fisheye Lens + 0.44x 150° Wide Angle + 15x Macro Mini Clip-on Cell Phone Camera Lenses Kit for Samsung, Android Smartphones (Electronics) Aukey lenses comes with hard case, additional carry pouch, mini lens cloth, a clip for the hard case (in which to clip it onto a backpack or purse), all 3 lenses and clip for the lenses. Lenses screw on. They seem to be good quality. The macro and wide angle lenses come together as one, and twist apart to separate them in order to use the macro lens by itself.Fish eye lens came with a scratch on the back side of the lens. It doesn't seem to cause any differences and cannot see it in the photos.It appears that the front of the lenses have a lens cap to protect them from scratches, but the backside does not. I can see where that can easily get dirty and get scratches.Lenses are small. Dropped easily as they have no grip.Just to note, you have to get up really, really close with the macro lens. Like 1-2 inches away from the subject you're capturing.Overall I'm very pleased with these lenses. I'm excited to venture out this summer and collect new images using... Read more, April 22, 2016
    List Price: $24.99
    Easily affix the lenses with perfect alignment to any mobile devices with the included clip
    Package Contents: AUKEY PL-A3 Optic Pro 3-in-1 Lens Kit, Lens Clip, Carrying Pouch, Cleaning Cloth, 24 Month Warranty
    Optic Pro 3-in-1 Lens Kit includes 198° Fisheye Lens + 150° Wide Angle Lens + 15X Macro Lens - Ideal for capturing detailed shots, wide landscapes, travel scenes, and wild selfies
    Crafted with aluminum alloy and multi-element coated glass to minimize ghosting, reflections, lens flare, and other artifacts
    Detachable soft rubber clip is easy to adjust and won't leave any scratches or marks on your mobile device


  • Hoya

    Hoya 77mm HRT Circular PL Polarizer Multi-Coated Glass Filter

    Photography (Hoya)
    List Price: $47.95

    As much as 25% more light, appx 1/3 stop more than regular polarizer
    Newly developed High-Rate Transparency film
    The HRT is a combination UV/Circular polarizing filter
    Passes more visible light through filter, yet filters the same amount of polarized light!!


  • AUKEY

    AUKEY Ora iPhone Lens, 0.45x 140° Wide Angle + 10x Macro Clip-on Cell Phone Camera Lenses Kit for Samsung, Android Smartphones, iPhone

    Photography (AUKEY)
    List Price: $39.99

    Package Contents: AUKEY PL-WD07 Ora 2-in-1 140° Wide Angle + 10x Macro Lens Kit, Lens Clip, Carrying Pouch, Cleaning Cloth, 24 Month Warranty
    Detachable soft rubber clip is easy to adjust and won't leave any scratches or marks on your mobile device
    Premium Ora 2-in-1 Lens Kit includes a 140° Wide Angle Lens + a 10X Macro Lens - The perfect combination for capturing travel scenery, wide landscapes, detailed close-ups, and unique selfies
    Macro lens gets you 10X closer to your subject for extreme close-ups. Wide Angle Lens opens up your field of view for breathtaking landscape photos or selfies. Pair with 58mm CPL filters for beautiful effects.
    Crafted with aluminum alloy and multi-element coated glass to minimize ghosting, reflections, lens flare, and other artifacts


  • Neewer

    Neewer for DJI Phantom 3 Professional and Advanced, 3 Piece Filter Set: (1)Polarizer Filter + (1)ND4 Filter + (1)ND8 Filter, Not for DJI Phantom 3 Standard

    Photography (Neewer)
    List Price: $22.99

    ND4 filter and ND8 filter effectively reduces the amount of light coming into the sensor without affecting the color, allows wider apertures and longer exposure time and helps to avoid overexposed photos
    Polarizer filter helps reduce glare and improve image contrast/saturation
    NOTE: * ONLY WHEN the original filter that comes attached to the Phantom 3 Professional/Advanced is removed, CAN these filters be mounted!
    The filter set includes: (1)Polarizer Filter + (1)ND4 Filter + (1)ND8 Filter. Note: * Compatible with DJI Phantom 3 Professional & Advanced. NOT for DJI Phantom 3 Standard. * DJI camera NOT INCLUDED
    Made of high resolution glass for razor sharp images and videos. Lightweight aluminum frame, easy installation and removal


Lenses and Filters