The pixels are never shifted though it is theoretically possible near the edges of the pixel array. It is always the micro lenses, CFA and light guides (especially for smaller pixels like 1.4um or smaller). Ulenses are to shifted to guide the optical energy into the pixel and mitigate color crosstalk. It is not as big a deal as it is for cellphone cameras. And this technique is running out of steam for really small pixels (<1.4um) and a lot of sensor makers are shifting to BSI (pixels on the top and all the metal below, eg. Sony Exmor, iPhone4) techniques.
denoir wrote:
It's possible, even probable that it's the micro lenses and not the pixels. I used the encompassing expression "photo sites" because of that. This is what Lloyd Chambers writes:
Ajay C wrote:
The pixels are never shifted though it is theoretically possible near the edges of the pixel array. It is always the micro lenses, CFA and light guides (especially for smaller pixels like 1.4um or smaller). Ulenses are to shifted to guide the optical energy into the pixel and mitigate color crosstalk. It is not as big a deal as it is for cellphone cameras. And this technique is running out of steam for really small pixels (<1.4um) and a lot of sensor makers are shifting to BSI (pixels on the top and all the metal below, eg. Sony Exmor, iPhone4) techniques. ...Show more →
Thanks for the info Ajay!
Do you perhaps know why the color shift is asymmetric (red on one side, cyan on the other). I thought at first it had to do with the CFA arrangement, but since the standard seems to be GRGB in a square arrangement, I can't really see the reason for the antisymmetry.
dennist wrote:
These shots were focused @ infinity just using focus confirmation. I look forward to getting out and using this lens with a tripod and live view.
At this distance and with a WA lens you can also use live-view handheld, because moving the camera back and forth 5-10cm won't change anything (at very close distance this is more difficult): You compose your photo more or less in the viewfinder, try to focus as precisely as possible with LED or by eye-sight, then press the Liveview button, pull back your head a bit in order to see the LCD, adjust the focus if necessary a bit, then close the mirror again, recheck exact framing and press the shutter. I do it with the ZF lenses on my 5dII, I have to close the aperture also, but it is possible. At medium to long distance no problem, with close distance it is more difficult because when changing from viewfinder to display it is difficult not to move the camera back and forth a few inches. At close distance it is still possible by using a support for the arm, like a tree trunk, or whatever - by holding the camera free it is difficult then...
I explain this because I am often too lazy to carry a tripod around specially in good light, but I still like to use liveview with my manual lenses in order to reduce the number of frames with misfocus.
denoir wrote:
Do you perhaps know why the color shift is asymmetric (red on one side, cyan on the other).
Are you sure it's asymmetric? I've seen some color shift on DSLR shots with UWA's, and I believe the cyan cast was near the borders and the magenta cast in the center (or vice versa).
philber wrote:
Magnificent shots, Einar! Your Jaguar picture is to die for!
Great share. Your landscapes and the first jaguar shot are gorgeous. Ironically, your 21 macro/close up shots are a lot better than your macros from the 100.
Your composition and choice of subject with the 21 is more interesting than the 100 shots.
It's taken a lot to work up the courage to post a pic on this thread - the collective work here is astounding - but here it is. My old dog, Ella, is now 13.5 years old and has become a fantastic sundial as she follows the sun around the house to sleep in its warmth. The new toy is my new 100MP that showed up on Wednesday. This was taken an hour or so ago, in the kitchen. Thanks for the inspiration.
