Schneider Makro-Symmar HM 120mm F/5.6
since: 2018/09/10
update: 2018/09/18
reference:
1. schneider Macro-Symmar HM
2. Makro-Symmar 5.6-120-1.0x
3. Schneider Kreuznach Makro-Symmar HM 120mm f/5.6 — Close-up Photography
4. Makro - Symmar , Jos. Schneider Optische Werke GmbH - macro-symmar.pdf
5. View Camera Magazine - July/August 1992: Macro Photography
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filter: 40.5mm
Simple determination of the scale and multiplying factor in the macro area
簡單確定微距區域中的比例和倍率
The formula often given in photography books and periodicals, v = (1+M)2, to compensate for the light loss caused by the bellows extension in close-up pho- tographs requires knowledge of the precise reproduc- tion ratio M and some calculation.
通常在攝影書籍和期刊中給出的公式，v =（1 + M）2，以補償特寫照片中波紋管延伸引起的光損失，需要了解精確的再現率M和一些計算。
The diagram at the left does it for you. Place the diagram or a photocopy of the original size on your template so that the basic line on the image on the focusing screen is parallel to the grid lines of the focusing screen, and the zero line falls on a perpendicular grid line.
左邊的圖表適合你。 將圖表或原始尺寸的複印件放在模板上，使聚焦屏上圖像上的基線平行於聚焦屏的網格線，零線落在垂直網格線上。
Then, at a distance of 1 cm on the focusing screen, read on the next grid line the scale of reproduction, the multiplying factor, as well as the correction factor corresponding to it in aperture increments.
然後，在聚焦屏上1厘米的距離處，在下一個網格線上讀取再現比例，倍率因子以及與孔徑增量對應的校正因子。
Either the time or the aperture is to be corrected, but not both, because that would constitute a double correction, which would then turn an underexposure without correction into just as large an overexposure.
時間或光圈要么被校正，而不是兩者都要校正，因為這將構成雙重校正，然後將不曝光的曝光不足變成過度曝光。
---------------------------------------------------------------------------
update: 2018/09/18
reference:
1. schneider Macro-Symmar HM
2. Makro-Symmar 5.6-120-1.0x
3. Schneider Kreuznach Makro-Symmar HM 120mm f/5.6 — Close-up Photography
4. Makro - Symmar , Jos. Schneider Optische Werke GmbH - macro-symmar.pdf
5. View Camera Magazine - July/August 1992: Macro Photography
filter: 40.5mm
Simple determination of the scale and multiplying factor in the macro area
簡單確定微距區域中的比例和倍率
The formula often given in photography books and periodicals, v = (1+M)2, to compensate for the light loss caused by the bellows extension in close-up pho- tographs requires knowledge of the precise reproduc- tion ratio M and some calculation.
通常在攝影書籍和期刊中給出的公式，v =（1 + M）2，以補償特寫照片中波紋管延伸引起的光損失，需要了解精確的再現率M和一些計算。
The diagram at the left does it for you. Place the diagram or a photocopy of the original size on your template so that the basic line on the image on the focusing screen is parallel to the grid lines of the focusing screen, and the zero line falls on a perpendicular grid line.
左邊的圖表適合你。 將圖表或原始尺寸的複印件放在模板上，使聚焦屏上圖像上的基線平行於聚焦屏的網格線，零線落在垂直網格線上。
Then, at a distance of 1 cm on the focusing screen, read on the next grid line the scale of reproduction, the multiplying factor, as well as the correction factor corresponding to it in aperture increments.
然後，在聚焦屏上1厘米的距離處，在下一個網格線上讀取再現比例，倍率因子以及與孔徑增量對應的校正因子。
Either the time or the aperture is to be corrected, but not both, because that would constitute a double correction, which would then turn an underexposure without correction into just as large an overexposure.
時間或光圈要么被校正，而不是兩者都要校正，因為這將構成雙重校正，然後將不曝光的曝光不足變成過度曝光。
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