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| bio | website | throughaglassdarkly.zenfolio.… |
|---|---|---|
| location | Decatur, AL | |
| age | ||
| visits | member for | 3 months |
| seen | 12 hours ago | |
| stats | profile views | 106 |
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13h |
revised |
Does high reflectiveness of digital sensor lead to poor lens performance? added 314 characters in body |
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13h |
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Does high reflectiveness of digital sensor lead to poor lens performance? Those measurements have been made. Most, if not all, digital sensors are much more reflective than virtually any film commonly used in photography. It is commonly accepted knowledge. |
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13h |
answered | Does Earth's latitude affect the color of light? |
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13h |
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Does Earth's latitude affect the color of light? The color of the suns light reaching the ground changes as the sun's angle in the sky changes because at a low angle the rays are traveling through several multiples of atmosphere compared to when the sun is directly overhead. If the Earth were the size of an apple, the atmosphere would be thinner than the peel on an apple. Going straight down through the peel is only a few microns. Going through the peel at an angle near tangent is several millimeters. |
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13h |
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Does Earth's latitude affect the color of light? How does latitude affect only the sun's intensity? If you are talking about the angle of the sun in the sky, that also affects the temperature of the light. The more atmosphere the rays have to travel through, the warmer the color of the sun's light becomes. |
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14h |
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Why is my camera so forgiving for overblown exposure? The histogram on your camera is based on the jpeg preview generated in camera. The data is gone and unrecoverable in the preview, but it is still preserved in the RAW file. |
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19h |
revised |
Does Earth's latitude affect the color of light? added 268 characters in body |
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19h |
answered | Does Earth's latitude affect the color of light? |
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19h |
revised |
How do I choose between 24-70 f/4 and 24-105 f/4 Canon lens? added 28 characters in body |
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19h |
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How did film photographers deal with issues around dynamic range? deleted 10 characters in body |
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20h |
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How do I choose between 24-70 f/4 and 24-105 f/4 Canon lens? In the case of the EF 24-70mm f/4L IS vs. the EF 24-105mm f/4L IS the 24-105 is sharper from around 35-40mm on up. The EF 24-70mm f/4L IS is sharper at both 24mm and 70mm than it is at 50mm. WHile this is atypical, it has been confirmed by several independent reviewers including The-Digital-Picture and gear-head Roger Cicala at lensrentals.com. |
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20h |
answered | How do I choose between 24-70 f/4 and 24-105 f/4 Canon lens? |
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20h |
revised |
Does high reflectiveness of digital sensor lead to poor lens performance? added 280 characters in body |
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20h |
answered | Does high reflectiveness of digital sensor lead to poor lens performance? |
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1d |
revised |
Where does the strange purple/blue glow around the headlight wearing subject's front come from? added 350 characters in body |
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Where does the strange purple/blue glow around the headlight wearing subject's front come from? OK. I was thinking the rock outcropping might have been a lot brighter relative to the rest of the picture and you may have selectively reduced the exposure/brightness in that one area during PP. If not, then the most likely source of the haze effect is either a lot of localized humidity in the air (like fog, in only some spots) between the helmet light and the camera or there was some fogging on the lower left portion of the lens' front element. |
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1d |
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Where does the strange purple/blue glow around the headlight wearing subject's front come from? Depending on what you have done with tone curves locally on the area of the rock outcropping, I'm guessing it is mostly ghosting from that. Is it also possible there was enough moisture and temperature differential in the cave to cause the lower part of the lens' front element to fog? |
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1d |
answered | Where does the strange purple/blue glow around the headlight wearing subject's front come from? |
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1d |
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Where does the strange purple/blue glow around the headlight wearing subject's front come from? Could you post the original uncropped photo? This may be ghosting caused by internal reflections. If so, the ghosting is inverted and flipped along the vertical and horizontal center axes from the original bright light source. |
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1d |
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Why would I use a rear gelatin filter over a front filter? Thanks! So for use in a lens like the EF 17-40 f/4L you would still need to purchase a larger size of the material and trim to fit the holder at the rear of the lens? Do you know if more than one thickness of the ND gelatin would fit in the internal holder? I could also see using the ND material to create an internal graduated filter by trimming it smaller than the holder size in the vertical dimension. |
