Serene Life

by garik

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5,823 reputation
1541
bio website sams.smugmug.com
location Mountain View, CA
age 36
visits member for 4 years
seen Oct 21 at 17:03

iOS engineer for SmugMug.com AND avid pro-am photographer.


Sep
9
comment Understanding Lenses Focal Length with Converters
@MichaelClark Totally agree w/that compression etc only changes if you try to keep the FoV the same (by changing the distance from the camera to subject). But I think thats the relevant discussion since if somebody is talking about a specific composition, the sensor size/lens choice is going to impact getting that specific composition since its FoV related. Which leads to the misconception I mentioned because people will say "Sensor size has no impact on compression/etc" because they're talking about it academically as opposed to keeping a consistent composition.
Aug
28
comment Understanding Lenses Focal Length with Converters
@MichaelClark By 'magnification' I assume you mean 'field of view' and I think what you're mentioning is actually a misconception. If you shot a landscape image with a 16mm lens that included a bird on a fence post and a barn 100' behind it and did a 50x crop on it such that it had the same FoV as a 800mm lens that shot just the bird, the DoF, compression etc would look very different on the two. Time to get some samples ;)
Aug
28
comment Understanding Lenses Focal Length with Converters
Only insofar as the field of view, there are many other things 'focal length' is related to (depth of field, focal compression, etc) and those don't change as @MichaelT mentions
Aug
26
comment Do film emulation presets assume a certain white balance setting?
Ah, hrmph, I'll have to go look back at my scans and see if thats the case in the software too. Thanks for the suggestion!
Jul
18
comment Do film emulation presets assume a certain white balance setting?
Agreed. I would expect if I shoot with actual Portra 160 film, in different color temperatures, to result in different casts, and I'd expect a Portra 160 preset to do those same casts and thats what I want to happen. The problem is, as you see in my image example, the color cast isn't the same as actual Portra 160 film.
Jul
18
comment Do film emulation presets assume a certain white balance setting?
" it likely assumed the photo was taken using either Auto WB or a WB set to the actual temperature of the light" I think that is the problem, the preset assumes you shot in daylight WB (or corrected to daylight WB) where I expect it should behave like Portra film which just has a color shift if you're not in Daylight.
Jul
17
comment Do film emulation presets assume a certain white balance setting?
What do you mean by "It seems like you may have applied the same bias to the RAW data twice."?
Jul
17
comment Do film emulation presets assume a certain white balance setting?
@mattdm Thanks for the nudge, done! :)
Jul
17
revised Do film emulation presets assume a certain white balance setting?
added 324 characters in body
Jul
2
awarded  Curious
Jun
13
comment Do film emulation presets assume a certain white balance setting?
You're right, I need to post some examples, will do!
Jun
11
asked Do film emulation presets assume a certain white balance setting?
May
12
awarded  Enlightened
May
12
awarded  Nice Answer
Apr
24
comment What options are there for a camera that's smaller than a full DSLR, but not a point-and-shoot?
I like that your answer is trying to be general (thus useful in the future) by offering "types" of alternative cameras w/specific examples as a fallback.
Mar
25
revised I can't get my new 580ex ll external flash unit to work on my 60D
Grammar police
Mar
25
comment Are regular external HDDs durable enough to be taken in a photo bag?
Hugely agree w/a SSD being a better solution, especially if we're just talking about enough for a single adventure, not backing up your entire collection.
Mar
25
comment Are regular external HDDs durable enough to be taken in a photo bag?
To address the "rugged" moniker, this is generally in reference to extra padding/protection externally on the drive enclosure, the actual drive itself is no more rugged than another.
Mar
19
comment What is background compression?
Indeed, according to wikipedia en.wikipedia.org/wiki/Perspective_distortion_(photography) If you keep the FoV the same by changing your distance to the subject, you get different perspectives (compression)
Mar
19
comment What is background compression?
I don't think this is true, its not just the perspective that impacts compression it is determined by the lens, take this photo for instance which is a panorama stitched from many 800mm photos: smu.gs/1j7GObt. There is clearly a lot of compression going on despite being a very wide image, if you did this same shot as a single 21mm photo, it would look quite different.