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visits member for 4 years, 1 month
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Dec
10
comment How should I specify minimum quality requirements for images submitted to my image archive?
Sorry, yes "dimensions in pixels" would be a better way to word that.
Dec
9
answered How should I specify minimum quality requirements for images submitted to my image archive?
Nov
18
awarded  Yearling
Oct
16
comment Is it possible to share albums privately on Flickr?
Or just create a separate account for just your family photos, if that is the only set of people you are concerned with.
Oct
10
answered Why does crop factor apply with APS-C lenses, and why aren't these brighter than FF ones at same aperture?
Sep
18
answered Does sensor size dictate lens size with all other things equal?
Aug
29
comment Is CMYK less blue than sRGB?
Modern color management just asks that all the devices in the workflow to have ICC profiles. That way the computer knows how the monitor displays colors, how the file expects its colors to be displayed and how the printer displays colors. But would a file that uses ProPhoto RGB give different results than a file that uses sRGB when printed? Both files will have the colors mathematically mapped to the device profile, so I wouldn't expect the difference to be huge -- but it is a good question.
Aug
29
answered Is CMYK less blue than sRGB?
Aug
21
answered film camera with waist level viewfinder
Jul
23
answered How do I take a photo of people before a bright window?
Jul
7
answered Will filters help me get better colors in my digital photographs of my paintings?
Jul
7
answered Why store both JPEG and raw?
Jun
23
comment Did film photography have lens correction counterparts?
Not an answer, but back in the day before computer pagination they would sometimes use an anamorphic lens on a large format copy camera to squeeze artwork (or text, or even whole pages) horizontally or vertically. It was about only way they could do non-proportional scaling.
May
22
comment Why image at 400mm is LARGER THAN DOUBLE of image at 200mm? (according to lens formula)
On the subject of 2A (crop factor = subject enlargement), I understand what you are saying, but from the standpoint of the image projected onto the sensor in principal there is no magnification. Here is another website that covers the subject: luminous-landscape.com/tutorials/understanding-series/… A quote: 'From Ansel Adams in his classic book “The Camera” (New York Graphic Society 1980) -- "All lenses of the same focal length give images of the same size at any given subject distance."' It's a technical point, but you seem like a smart, technical person.
May
22
comment Why image at 400mm is LARGER THAN DOUBLE of image at 200mm? (according to lens formula)
If you want to get a better picture of the design of modern multi-element lens ... I'm really not sure where to go. A starting point might be advanced amateur astronomy, where there are still folks who shape their own lenses.
May
22
answered Why image at 400mm is LARGER THAN DOUBLE of image at 200mm? (according to lens formula)
May
20
comment Exposure compensation or ISO sensitivity?
Assuming you have been correcting your underexposed images in post, I wonder if a better phrasing of the question might be, "What is the difference, if any, between changing the ISO and underexposing and then correcting in post?". Does that make sense?
May
9
answered Precise focus information in metadata
May
9
answered How do I get over my shyness when taking photos of strangers?
Apr
16
awarded  Editor