| Photograph Information |
Photographer's Comments |
Challenge: Puzzle Macro VI (Standard Editing)
Camera: Canon EOS-1D Mark IV
Lens: Canon EF 35-80mm f/4.0-5.6 III
Location: A dustbin
Date: Feb 7, 2017
Aperture: 16.0
ISO: 1250
Shutter: 1/100
Galleries: Abstract, Macro
Date Uploaded: Feb 12, 2017
|
A hand-held focus stack with a home-converted true macro lens. The interior of a fairly new Macbook Pro. I'll leave commentary on the ventilation design quality of Apple products aside in this instance, and instead talk about the shot.
I mentioned that this is a photo with a home-converted lens - a bit of an experiment. An interesting trick that you can carry out with the otherwise fairly useless 35-80mm 90s plastic zoom is that by removing the front element group altogether, you can convert it to a fairly capable fixed focus macro lens. Well - although you've removed the front group which is the only part that moves to focus this lens, it's not really fixed focus, as you can still use the former zoom as a sort of magnification control. At its best, at 80mm, it provides a fairly formidable 1.7x magnification with a subject distance of around 30mm - not to be scoffed at, considering you can grab one of these otherwise crappy zooms for about £30 on ebay, and suddenly end up with a reasonable competitor to the far more expensive Canon MP-E 65mm.
At such magnifications, of course you need a lot of light and a small aperture; however, this was a snapshot taken while cleaning a business laptop, and I didn't really have time to set up the lights and a tripod - hence the fairly high ISO, as the light was an LED torch placed close to the board to project strong shadows. As mentioned earlier, this was a hand-held shot - in fact a focus stack of two images from a consecutive burst, to maximise the depth of field. I'm not entirely happy with the level of sharpness here, but I'm not sure there was much more I could do. Although I could have gone smaller than f/16, I would have started to lose more sharpness due to diffraction - and this jerry-rigged DIY lens has a rather curved field of focus anyway, so there are diminishing returns to be had in the depth of field department, anyway.
Editing: Curves to bring up the blues in the shadows and midtones and the gold in the highlights. Selective hue and saturation adjustments. Wavelet decompose, and suppression of large detail scales selectively on the surfaces of the board components. Clone of distracting details near the edges of the frame. Resize, and selective sharpen. |
| Author | Thread |
|
|
02/20/2017 07:35:58 AM |
Hello from the critique club
An appealing image that fulfils the challenge brief
You do use some interesting optics Eugene, or in this case, bog standard optics made more interesting. Its an interesting concept that has come out reasonably well considering it was a quick hand-held two exposure blend. You will be the first to recognise its shortcomings but the one that spoils it most for me are the blown highlights from the harsh lighting. Having said that thanks for another interesting entry. |
|
 Photographer found comment helpful. |
Comments Made During the Challenge  |
|
|
02/19/2017 11:58:42 PM |
| that's one bad mutherboard |
|
| Photographer found comment helpful. |
|
|
02/18/2017 01:09:59 AM |
| Lots of dirt and fluff adhering to a dirty, fluff covered thing. (Seriously, no idea what the thing is.) |
|
| Photographer found comment helpful. |
|
|
02/17/2017 11:10:07 PM |
| A computer built by mildew to reverse engineer Lysol. |
|
| Photographer found comment helpful. |
|
|
02/17/2017 10:08:40 AM |
| too many bugs prevented this from fulfilling its promise |
|
| Photographer found comment helpful. |
|
|
02/16/2017 12:19:15 AM |
|
| Photographer found comment helpful. |
|
|
02/15/2017 05:51:25 PM |
|
| Photographer found comment helpful. |
|
|
02/15/2017 08:16:54 AM |
|
| Photographer found comment helpful. |
|
|
02/14/2017 08:48:21 PM |
|
| Photographer found comment helpful. |
|
|
02/14/2017 06:39:55 PM |
|
| Photographer found comment helpful. |
|
|
02/14/2017 10:40:11 AM |
| Dust on some electronic circuitry. Bit blown out on the left, though. |
|
| Photographer found comment helpful. |
|
|
02/14/2017 07:58:40 AM |
| did u drag an old Circuit Board on carpet? |
|
| Photographer found comment helpful. |
|
|
02/14/2017 04:48:51 AM |
| An abandoned circuit board taken over by nanobot squatters. |
|
| Photographer found comment helpful. |
|
|
02/14/2017 12:39:48 AM |
|
| Photographer found comment helpful. |
|
|
02/14/2017 12:14:52 AM |
something great! USA
a molden chipset |
|
| Photographer found comment helpful. |
|
|
02/13/2017 08:52:41 PM |
|
| Photographer found comment helpful. |
|
|
02/13/2017 02:13:44 PM |
| Dusty transistor wasteland |
|
| Photographer found comment helpful. |
|
|
02/13/2017 10:17:01 AM |
| Dust on an electronic PCB? |
|
| Photographer found comment helpful. |
|
|
02/13/2017 10:07:18 AM |
| Is this a really dusty circuit board? |
|
| Photographer found comment helpful. |
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Prints! -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2024 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 04/19/2024 06:39:20 AM EDT.
Add photograph to your favorites
Add photographer to your favorites
