WebJun 17, 2003 · REDUCES FOCAL LENGTH AND F/RATIO BY 37%: Simply thread the reducer onto your telescopes rear cell and an f/10 Schmidt-Cassegrain becomes f/6.3. An f/11 instrument becomes f/7. COMPATIBLE WITH ALL YOUR ACCESSORIES: Once the reducer is installed, you can add accessories like a T-Adapter, visual back, star diagonal … WebResize - Optionally, you can downscale JPEG images to further reduce file size [2]. Reduce Chroma Sampling - Implements less resolution for chroma information than for luma …
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WebJul 18, 2006 · Optec’s MAXfield unit is specifically designed to compress the field of an f/10 Schmidt-Cassegrain to a remarkable f/3.3 for CCD work. The spacing between the reducer and chip is critical, however, and changing it by even a millimeter degrades images. Also, the reducer has a maximum usable field about 11 mm across, too small for large chips. WebDec 12, 2014 · A focal reducer forms an image at a specific distance from the sensor. As I recall the f/3.3 focal reducer is designed for use with astrocameras and the body of a DSLR is too deep to allow it to get close enough to the sensor. In order to get f/3.3, it has to form the image very close to itself. 頭痛 声枯れ コロナ
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WebJun 17, 2003 · REDUCES FOCAL LENGTH AND F/RATIO BY 37%: Simply thread the reducer onto your telescopes rear cell and an f/10 Schmidt-Cassegrain becomes f/6.3. … WebJan 24, 2024 · The reducer-corrector does two things. It corrects some of the image distortion that is inherent in the design of the standard f/10 SCT. It reduces the effective focal length by .63x hence f/10 to f/6.3. Reducing the focal length has the effect of reducing the magnification and increasing the field of view. WebChoose "Target file size" to get an exact output file size. Choose "Target audio quality" when quality is of importance. Enter Target Size Percentage. %. Select a target file size as a percentage of the original. Smaller values compress more. For example, a 10Mb file would become 4Mb if you select 40%. Please set a value between 1 - 100. 頭痛 夜だけ