Serene Life

by garik

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8,325 reputation
1127
bio website sequoiagrove.dk
location Denmark
age
visits member for 2 years, 1 month
seen 12 hours ago

I work with R&D in computer vision and am an amateur photographer. I developed my own image viewer and editor, too, because I am tired of moving images around in different software and it gives me a common platform for including my own algorithms and formats used in my research.

http://500px.com/sequoiagrovevisions

My gear:

  • List item
  • Canon 40D with battery grip
  • Speedlite 430ex
  • Canon 28mm 1.8 USM, Pentax SMC M 50mm 1.4, Canon 85mm 1.8, Carl Zeiss jena 135mm 3.5, Sigma 17-50mm 2.8 EX OS HSM, Sigma 10-20 HSM, Helios 44-2 58mm F2
  • Image View Plus More (sorting, viewing, slideshows, raw developing, adjustments, retouching, all-in-one)
  • Photoshop Elements
  • Upgrade wish list: 14mm F2.8, 35mm 1.4L, Canon 400 F4, Jupiter9 85mm F2 or Samyang 85mm 1.4, Canon 70-200 F/x L. Canon 60mm Macro

Oct
16
comment How to photograph a lightbulb?
i like the first one best.
Oct
5
comment Was there ever a photo that made people cry?
Actually, that arbeit macht frei gave me shivers. But thats because I know all that is behind it. The pipers dont give me an emotional reaction, other than I think it is great that people keep up traditions like that, even if it looks funny. I listen to some good deaht metal bands with bagpipes, too.
Sep
23
comment How does focal length determine lens quality?
it doesnt say anything about quality.
Sep
21
comment When should I consider an image sharp?
photo sharpness is normally disappointing viewed 100%. Which means: dont.
Sep
16
comment How do zoom, magnification, and focal length relate?
you should add that the X:Y specs is given at minimum focus distance. Go away farther and you wont achieve it.
Sep
16
comment I tried to use the “Sunny 16 rule” but it didn't work, why?
The first is better. just need to fiddle with the dynamic range in the raw file. .
Aug
11
comment Too much “Grain” in photos
it says 200-2000 iso
Jul
18
comment How can I get perfect sharpness when shooting still art?
adjustments to you list: try F 5.6-F8, and use mirror lockup, delayed shot (timed). since nothing is moving stick to iso 100. You are shooting raw right? Your images are kinda low contrast. increasing contrast also aids the perception of sharpness.
Jul
8
comment Which of these lenses will work?
why do you think I think the difference is sensor size? ofc it is distance, duh. thats why min focus distance is important to minimize to achieve 1:1. total magnification? when talking about 1:1 ( or more) macro lenses, everything that goes on after projection through the lens is irrelevant. Magnification by the lens increase quality, magnification after sampling decrease quality (ie dec. resolution, e.g. printing the same image at 300 DPI or 150 DPI). You cant pool those two magnification techniques into one "total mag.". Projecting larger is really the best way to gain IQ.
Jul
7
comment Which of these lenses will work?
the trends Ive seen emerge is (dont know enough optics theory to state this IS the truth): the optics has a tendency to blur before you get to record anything if its not 1:1 squeezing the light is hard. in the link above notice how significantly sharper it gets at 1:1 vs 1:2 and 2:3. thats not the higher pixel count per inch alone that makes this sudden focus. thats also why the same lens performs better on FF than crop even if the crop has same/more pixels.
Jul
7
comment Which of these lenses will work?
If "crop factors" were important in talk about macro, then you could say that a FF with any lens could give you 10:1 or 29:1 if you crop the image. In macro magnification is the major spec. thats why specialty macro lenses like navitar and zeiss use magnification in the spec sheets instead of focal length. It doesnt matter which camera you put them on. It doesnt change the magnification. It just changes your FOV.
Jul
7
comment Which of these lenses will work?
dpreview.com/articles/6519974919/… "What happens if the subject is the same size in real life as its projection? If we shoot a 1cm fly and its projection on the sensor measures 1cm as well, the magnification is 1:1. The 1:1 ratio has an important meaning for macro enthusiasts. Technically speaking, macro photography means shooting at a magnification ratio of at least 1:1. Therefore, a 'true' macro lens has the ability to produce a magnification ratio of 1:1, or higher."
Jul
7
comment Which of these lenses will work?
1:1 is one to one, whether you have a 1mm sensor or a 10 feet sensor.
Jul
7
comment Do I have to resample images when resizing them (smaller)?
if this about a checkbox in a program, or image processing techniques?
Jul
6
comment What is considered high quality bokeh?
to me the shape is the contours, inner (if present) and outer, and the texture incl. light distribution.
Jul
5
comment What is considered high quality bokeh?
the doughnut shape from mirror lenses is in fact part of what we are talking about with "the shape of the bokeh".
Jul
3
comment How to align several pictures in LR?
you need a full 3D representation to change the angle in software. 2D warping only works on planes.
Jun
27
comment How can I get the exposure correct in this picture?
You dont need to use HDR on every occasion just because you can. The camera has plenty DR for most situations. It's just in camera jpeg conversion that didnt know what you wanted.
Jun
23
comment Is Canon 16-35/4 IS better than 16-35/2.8 II at f/4?
digital picture has only reviewed the theoretical performance and they look forward to testing if the MTF is right.
Jun
22
comment Techniques used in long exposure in a forest
his technique is described here: fototripper.com/category/hdr-tutorial