What Professional type of direct sight cameras?
"Rangefinders" are often called primarily for the business market and are priced accordingly.
They include a few 35mm cameras such as the Leica and Contax, several for medium-sized roll film, and a few large-format portable cameras.
The viewfinders are for the most part "parallax-corrected", which means that the lenses shift the lines of the image down slightly as you focus.
An attraction of these cameras is their silent shutters, and the reduced weight compared to single-lens reflexes providing the same image format.
They are also sturdy and feature high-precision optics. The Leica features a virtually soundless focal plane shutter and a modest range of interchangeable lenses.
The viewfinder automatically changes its frame lines depending on your adjusting purpose.
The reading of the exposure is done through the lens taken, by a light sensor articulated just in front of the shutter, which moves in the way immediately before you photograph.
Medium-sized direct-sight cameras often have the same characteristics as interchangeable lenses and remote-sensing focus or have automatic zoom and focus.
Everything is magnified – if the size is 6 7cm t.
The standard lens is probably 80mm or zoom between 55 and 90mm on a 6 4. 5cm camera.
They are popular among some professionals for writing and studio work where both formal groups and more spontaneous photographs will be needed.
Wedding photographers are accustomed to working with medium-format cameras regularly,
but more recently, most have converted top-of-the-range 35 mm digital cameras as these offer the vital preview facility and the security of knowing that you have the shot!
Specials. Some roll-up cameras with direct viewfinders are designed for more limited special applications.
They include wide-angle cameras giving a pan-like format such as 617cm, and highly portable displaced lens cameras for architectural photography that allow you to elevate the lens to control perspective effects.
Some basic cameras also accept a direct vision viewfinder, corresponding to the lens used, and have an optical rangefinder connected to the mechanism of the focal path.
You can then take photos by hand on a 4–5-inch film or switch to medium format images by attaching a roll to the back.
Advantages of direct viewfinders.
1 - An all-in-one unit, especially fast to activate and save things as they occur.
– obtain a picture you would otherwise have missed. Press photographers often carry a compact auto like a backup camera.
2 - The viewfinder gives a crisp and brilliant picture. You can also see part of your subject in the viewfinder before it enters the market framework, good for sport and action.
3 - Modern compact pack in a wide range of practical features – motor drive, autofocus, automatic exposure adjustment program, zoom, flash – while remaining small.
4 - Medium format DV cameras can be designed for specialized roles, portable architectural photographs, panoramas, or broader work where portability and medium format results are required.
Drawbacks to the direct sight.
1 - The parallax error between the sight and the objective is a real problem when working near the objective. Even though "parallax-corrected" cameras provide accurate framing, the difference in point of view still gives you a slightly different alignment of the elements behind each other – sufficient to disrupt critical compositions.
2 - There is no practical way to visually verify the depth of field.
3 - It is easy to have a finger or strap accidentally blocking the lens, exposure sensor, or autofocus remote sensing.
4 - Inexpensive auto-focus compacts take a discernible amount of time to concentrate.The time it takes to press. And shooting may mean that you lose the key moment of quick action.
5 - The small flash integrated into compact cameras is not very powerful and only produces a flat light. It cannot be rebounded unless the camera has a shoe accepting a pocket gun.
6 - Most small-format compact packs completely depend on the power of the battery to run.