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Table of Contents
- 1 Table of Contents
- 2 Name of Parts and Cross Section of the Lens
- 3 General Description
- 4 Perspective Correction for Analog and Digital Photos
- 5 Large Image Circle for Lens Shifts up to ¡¡ MM
- 6 Fixing and Removing the Lens
- 7 Replacing the Mount for a Different Camera
- 8 Parallel Shift
- 9 Focusing and Depth of Field
- 10 Measuring the Exposure
- 11 Filters, Lens Hood and Camera Mounts
- 12 Specifications
- Download this manual
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Table of Contents
Summary of Contents for Schneider Kreuznach PC-SUPER-ANGULON 28 mm f/2.8
- Page 1 PC-SUPER-ANGULON 28 mm f/2.8 User Manual Schneider Optics Inc . 285 Oser Avenue Hauppauge · NY ¡¡788 · USA Phone 63¡ .76¡ .5000 63¡ .76¡ .5090 info@schneideroptics .com www .schneideroptics .com Exclusive distributor for the USA...
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Page 2: Table Of Contents
List of Contents Name of Parts and Cross Section of the Lens General Description Perspective Correction for Analog and Digital Photos . . . . . . . . . . . . . . . . . . 6 Large Image Circle for Lens Shifts up to ¡¡... -
Page 3: Name Of Parts And Cross Section Of The Lens
Name of Parts and Cross Section of the Lens Focusing ring Distance scale Depth of field scale Aperture scale Aperture setting ring Pre-set aperture setting lever Shifting knob Index Knurled ring Camera mount Fixing screw for camera mount PC-SUPER-ANGULON 1,25 0 , 3 0, 3 5... -
Page 4: General Description
General Description The SCHNEIDER PC-SUPER-ANGULON 28 mm f/2 .8 is a very high-quality wide-angle lens for 35 mm analog and digital SLR cameras and provides a parallel shift facility like the sliding lens panel of professional large-format cameras for correcting converging vertical lines and for manipulating the perspective especially for use in architectural and product photography . - Page 5 Vertical shift is the most popular: upward, especially when photographing high buildings, so that the camera does not have to be tilted upward; and downward for product shots at an oblique angle or also for shots from high locations such as towers or mountains so that the camera does not have to be tilted downward .
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Page 6: Perspective Correction For Analog And Digital Photos
Perspective Correction for Analog and Digital Photography The equalizing of converging lines or of unfavorable perspective due to a camera location made necessary by obstacles, reflections or danger, e .g . traffic, is not only interesting for conventional analog photography, but also for digital photography when higher quality demands are made . While digi- tal images or digitized (scanned) analog images can be equalized on the computer using image editing software such as Photoshop, this is, however, associated with substantial degrading: If the rectangular image is distorted... - Page 7 es the sharpness, produces just visible bluish violet or reddish brown color fringes at edges which have been made perpendicular under fairly high en- largement and gives an image with incorrect proportions (width-to-height ratio) . Since the final image must, however, be rectangular, the triangular ar- eas projecting on two sides have to be cut off, which shows how many pix- els, which are important for high resolution, are lost .
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Page 8: Large Image Circle For Lens Shifts Up To ¡¡ Mm
Large Image Circle for Lens Shifts up to 1¡ mm The PC-SUPER-ANGULON 28 mm f/2 .8 already produces an exceptionally flattened image at full aperture within the 62 mm image circle which is thus twice as large in area relative to the image circles of other 35 mm lenses . Sharpness and contrast are increased further in the central area used with- out shift by stepping down slightly to f/4 to f/5 .6 . - Page 9 entation can always be chosen, e . g . irrespective of the shift direction with the knob at the bottom with free hands, or rather at the top at the tripod . Natural size max. ¡¡ mm max. ¡0.5 mm With a shift to the left or to the right, the shifting...
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Page 10: Fixing And Removing The Lens
¡0 Fixing and Removing the Lens The lens is available in a connection socket to match different 35 mm SLR camera systems and is inserted into the camera bayonet or thread for fas- tening to the camera such that the red dot on the connection socket is op- posite the corresponding marking on the camera . -
Page 11: Parallel Shift
Parallel Shift ¡1 The lens is shifted perpendicular to the optical axis relative to the bayonet mount and so also relative to the taking format by rotating a knurled shift- ing knob at a shaft which is elastically flexible to protect against its damage or injury to the user . -
Page 12: Focusing And Depth Of Field
¡2 Focusing and Depth of Field The focusing of wide-angle lenses appears to be relatively non-critical due to their large depth of field . However, careful focusing is actually necessary to utilize the high imaging quality of this lens to the full . To ensure maxi- mum brightness of the focusing screen and the best recognition of the ide- al focusing point, the aperture should be opened by pivoting the stopping- down lever toward the shifting knob . -
Page 13: Measuring The Exposure
Measuring the Exposure ¡ If the measurement is not carried out using a separate hand exposure me- ter, but using the TTL exposure meter integrated in the camera, it is neces- sary to measure in the centered position of the parallel shift while stop- ping down to the working aperture because the arrangement and align- ment of the measuring cell of almost all SLR cameras requires a direction of light incidence axially symmetrically to the lens bayonet . -
Page 14: Filters, Lens Hood And Camera Mounts
¡ Filters, Lens Hood and Camera Mounts Only the oversized B+W WA filters of the size 67 EW can be used with the SCHNEIDER PC-SUPER-ANGULON 28 mm f/2 .8 due to the extreme- ly large image angle utilized at maximum shift up to 93 .4° . The following table shows the order numbers of the most popular filter types –... - Page 15 ¡ Wide-angle filters of size 6 EW Order no. B+W UV Filter with MRC coating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40295 B+W Skylight filter MRC coating .
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Page 16: Specifications
¡6 Specifications Relative aperture . . . . . . . . . . . . . . . . . . . . . . . . . ¡:2 .8 Effective focal length .
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