The new Carl Zeiss C Biogon T* 2,8/35 ZM lens is the perfect addition to your light, mobile photo equipment. Its moderate speed of 1:2.8 permits an exceptionally compact construction. The symmetrical Biogon construction with 7 lens elements in 5 groups allows for practically distortion-free images. The ZM lens series from Carl Zeiss is suitable for cameras with the M-bayonet, and will be available in mid 2008 for € 590.00 (excluding VAT).

As the latest member of the ZM lens family, the C Biogon T* 2,8/35 ZM lens is the perfect addition to your light, mobile photo equipment. The C Biogon T* 2,8/35 ZM will inspire you with perfect images, even at full aperture. Together with the compact C Biogon T* 4,5/21 ZM, it creates the ideal equipment for a wide range of applications such as documentation and architecture photography.

The “C” in the title indicates another outstanding feature: rather unusual for a lens of this performance class, its moderate speed of 1:2.8 permits an exceptionally compact construction. The symmetrical Biogon construction with 7 lens elements in 5 groups allows for practically distortion-free images.

The ZM lens series from Carl Zeiss is suitable for cameras with M-bayonet. As with the other lenses in this line, the C Biogon T* 2,8/35 ZM features an intuitive operating concept, a robust all-metal frame and a precise, noticeable click in 1/3 aperture stops.

Features:

• Focal length: 35 mm
• Aperture scale: f/2,8 – f/22 (in 1/3 increments)
• Focusing range: 0.7 m – infinity
• Angular field, diag./horiz./vert.: 62°/53°/37°
• Coverage at close range: 41 x 62 cm
• Image ratio at close range: 1:17
• Number of elements/groups: 7/5
• Filter thread: M 43 x 0.75
• Weight: 200 g
• Dimensions (with caps): 52 mm diameter, length 55 mm

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FISH EYE LENS is a wide-angle lens that takes in an extremely wide, hemispherical image. Originally developed for use in meteorology and astronomy and called “whole-sky lenses”, fisheye lenses quickly became popular in general photography for their unique, distorted appearance.

They are often used by photographers shooting broad landscapes to suggest the curve of the Earth. Hemispherical photography is used for various scientific purposes to study plant canopy geometry and to calculate near-ground solar radiation.

The focal lengths of fisheye lenses depend on the film format. For the popular 35 mm film format, typical focal lengths of fisheye lenses are between 8 mm and 10 mm for circular lenses, and 15-16 mm for full-frame lenses.

All the ultra-wide angle lenses suffer from some amount of distortion. While this can easily be corrected for moderately wide angles of view, rectilinear ultra-wide angle lenses with angles of view greater than 90 degrees are difficult to design. Fisheye lenses achieve extremely wide angles of view by foregoing a rectilinear image, opting instead for a special mapping (for example: equisolid angle), which gives images a characteristic convex appearance. A panorama by rotating lens or stitching images (cylindrical perspective) is not a fisheye photo.

TYPES OF FISH EYE LENS

Circular

The first types of fisheye lenses to be developed were “circular fisheyes” - lenses which took in a 180-degree hemisphere and projected this as a circle within the film frame. Some circular fisheyes were available in orthographic projection models for scientific applications.

Full-frame

As fisheye lenses gained popularity in general photography, camera companies began manufacturing fisheye lenses that enlarged the image circle to cover the entire 35 mm film frame. Because of this, the picture angle produced by these lenses only measures 180 degrees when measured from corner to corner.

The first full-frame fisheye lens to be mass-produced was a 16 mm lens made by Nikon in the late 1960s. This is the type of fisheye most commonly used by photographers. Digital cameras with APS-sized sensors require a 10.5 mm lens to get the same effect as a 16 mm lens on a camera with an image sensor the size of a 35mm film image.

Focal length

The widest lens ever produced was a 6 mm circular fisheye made by Nikon. Initially designed for an expedition to Antarctica, it featured a 220-degree field of view, designed to capture the entire sky and surrounding ground when pointed straight up. This lens is still manufactured by Nikon upon special order, and is used nowadays to produce interactive virtual-reality images such as QuickTime VR and IPIX.

Because of its very wide field of view, it is very large and cumbersome - weighing 5.2 Kg (11.5 lb) and having a diameter of 236 mm (9.3 in). It dwarfs a regular 35mm SLR camera and has its own tripod mounting point, a feature normally seen in large long-focus or telephoto lenses to reduce strain on the lens mount because the lens is heavier than the camera.

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It is universally known that photographic lenses in general are very sensitive optical instruments that need careful treatment. They are not just mere glass. You have to pay decent attention to the way you take care of them. For example, it is essential that you minded the temperature you are using the lenses at and in general in what conditions they are at the moment. It is also important not to touch the optical details and always put the dust away from the lens with a soft and clean hair brush regularly and what not. Of course, it may seem to you that there are too many rules and they are hard to follow all the time, like letting the lens warm up in the case for three hours after bringing it from the cold into a warm room.

So if you used the lenses in the right way but still see some faults or just want to interchange the used telephoto lenses, Olympus, for example, you are free to do that. The great plus is the possibility to change them whenever you wish and in this way to improve the quality of the images you try to make, or in general the “appearance” of the camera itself.

The amount and the diversity of telephoto lenses are great; the most essential and so to say of the vital importance is, of course, to find a suitable one. The second most important fact is to know that not all cameras suit telephoto lenses of all manufacturers. For example MC Rubinar 10/1000 Macro Telephoto Lens can be used practically on any device, but still Canon EOS 10D camera is quite unlikely to work with this stuff unless, of course, you get the Teleconverter or some other Extension Tube. (Wanna see the bugs love?)

So as you see everything is not so simple, as it may seem at first: just buy and be satisfied. A lot of effort should be spent in order to find what you need and then be ready to take care of it like of a small baby. Anyway, those, who are crazy about photos and making them, will not complain, I am sure.

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