Projector lens 0.65X is used for Epson projector. Total length of the projector lens is 109.2mm,external diameter of small end is 77mm,external diameter of big end is 134mm - Update: 2012-06-20

Windows are applied to isolate different physical environments while allowing light to pass. When selecting windows you should consider materials, transmission, scattering, wave front distortion, parallelism and resistance to certain environment. Chi... - Update: 2012-06-05

Achromatic Lens is an achromatic consists of a positive low-index Crown Glass lens element cemented to a negative high-index Flint Glass lens element. Specification of our achromatic lens as follow: *Material:BK7 and ZF2(or according to your reque... - Update: 2012-06-05

Specification of our adapter ring as follow: *M25,27,28,30,30.5,34,40.5mm,43mm,46mm,49mm to 37mm *M37,40.5,43,49,55,58,62 to 52mm *M52,55 to 58mm *M55,58,62,67 to 72mm *M67,72,77 to 82mm - Update: 2012-06-05

Wide-angle lenses are great for capturing the expanse of a mountain view, or for giving one an appreciation of the entirety of an organism's habitat.? Specification of our wide angle lens as follow: 25mm 0.45X wide angle lens 27mm 0.45X wide a... - Update: 2012-06-05

Fisheye lens distorts straight lines into ridiculous curves. Straight lines, depending on where they are in the photo can be pulled a lot, a little, or not at all. The farther they are from the the center line of the photo, the more distortion there ... - Update: 2012-06-05

Telephoto lens has a narrower angle of view,it thus gives apparent magnification to objects,it also seems to compress distant things, and there is less depth of field. The most obvious is to allow photographs of distant organisms to be made. Speci... - Update: 2012-06-05

Fisheye lens distorts straight lines into ridiculous curves. Straight lines, depending on where they are in the photo can be pulled a lot, a little, or not at all. The farther they are from the the center line of the photo, the more distortion there ... - Update: 2012-06-05

Waveplates (retardation plates or phase shifters) are made from materials which exhibit birefringence. The velocites of the extraordinary and ordinary rays through the birefringent material varies inversely with their refractive indices. Specific... - Update: 2012-06-05

Wedge prism is an optical element having plane-inclined surfaces, usually the faces are inclined toward one another at very small angles. Wedges divert light toward their thicker portions. Specification of our wedge prism as follow: *Material:BK7... - Update: 2012-06-05