by damned truths

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54,713 reputation
bio website
location Aurora, CO
age 35
visits member for 4 years, 5 months
seen 2 days ago

I am a relatively new photographer, having been at if for only a few years. I chose Canon gear when I finally took the plunge into DSLR. I am an avid hobbyist now, and love everything about photography, from the gear, to the science, to the art. I spent years reading about the technology and photography theory, so I am very well versed in the technical aspects of photography. My artistic skills are moderate, but improving. You can see my work @ the following sites:

My interests lie primarily in nature photography:

  • Birds
    • Songbird Setups
    • Shore Birds & Waders
    • Raptors
    • All others
  • Astrophotography
    • Moon
    • Wide Field
    • Deep Sky
  • Landscapes
  • Wildlife
  • Floral Macro
  • Insect Macro
  • Abstract

I currently use the following gear:

  • Cameras
    • Canon EOS 7D
    • Canon EOS 450D (Rebel XSi)
  • Lenses
    • EF 16-35 f/2.8 USM L Wide
    • EF 50mm f/1.4 USM
    • EF 100mm f/2.8 USM Macro
    • EF 100-400mm f/3.5-5.6 IS USM L Zoom
    • EF 600mm f/4 L IS II
    • Canon EF 1.4x TC III
    • Kenko 1.4x Teleplus Pro 300 DGX
    • Periodic Rentals:
      • EF 300mm f/2.8 L IS II
      • EF 500mm f/4 L IS II
      • Canon EF 2x TC III
  • Filters
    • Lee Foundation Kit (x2) + Tandem Adapter
    • Lee .3/.6 ND
    • Lee .3/.6/.9 Soft Grad ND
    • Lee .3/.6/.9 Hard Grad ND
    • Lee CPL
  • Tripod
    • Gitzo Systematic GT3532LS 3S. Series 3 Tripod
    • Jobu Pro 2 Gimbal
    • Gitzo Mountaineer GT0541 4S. Series.0 Tripod
    • Gitzo GH1780QR Series.1 Mag. Center Ball Head

comment General guidelines on choosing a lens for an image sensor
@Naz: Sensors are pretty useless without some kind of lens to focus an image on them. As such, I think if you are trying to design a sensor, you really need to learn optics. It's kind of a critical bit of knowledge. There are plenty of resources out there that explain how optics works, for reflective or refractive elements (and combinations of the two)...educating yourself is really the best way to address your problems.
comment General guidelines on choosing a lens for an image sensor
@Naz: Can you explain what you are actually doing? Were kind of working in the dark here...
comment What apertures are required to enable autofocus, including cross-type or high-precision focusing, on Canon DSLR cameras?
Thanks, DL. Looks good to me. We just need to get some upvotes on the new one, so it floats to the top. ;)
comment Can I ask Lightroom to delete copied photos from the SD card?
@jdlugosz: It's a full parity RAID, so it has full error correction information distributed across all the drives. In my case, I have four drives in my array. I don't know the underlying details, as in specifically how it verifies each block, but I know it can and does make sure the data is correct everywhere on the whole array when it is doing it's scrubbing/resync process. I've actually done a live (online) drive replacement...I took out one of my smaller drives, and added a larger one. The device kept operating, and automatically rebuilt the data on the removed drive onto the newly added.
comment Can I ask Lightroom to delete copied photos from the SD card?
...then dropping again. In such situations, the device will launch right into a verification mode and start a resync, only to have power fail again right in the middle of that. I've never once lost any data on my ReadyNAS, and I've had it for years. It's a nearly impervious device, and it DOES regularly (weekly, on the schedule I've set) scrub and resync the array to ensure that the chance of bad blocks causing problems is extremely low.
comment Can I ask Lightroom to delete copied photos from the SD card?
@jdlugosz: Sorry, that is not the case. With the ReadyNAS, scrubbing is basically doing a resync. That touches every block on the device and verifies the data. It takes about a day and a half to complete, and the device is running heavily the entire time. The benefit of doing this on X-RAID is, unlike most resyncs, if the device loses power or is otherwise shut off in the middle of the scrubbing process, it will properly recover when it boots again. I've had some brownouts and power outages where the power flickers on and off a number of times, or dropping, then returning for a few minutes...
comment Can I ask Lightroom to delete copied photos from the SD card?
@jdlugosz: The Ready-NAS with X-RAID does regular scrubbing, which goes through all the data on the entire array and checks it out, reorganizes and optimizes it. So, there can't be silent corruption...the system is always checking itself, identifying bad blocks, and moving data. If a block on one drive is bad, it can always be rebuilt with parity.
comment How can I take long exposures on Nikon D7000 with a wireless remote?
Before we close this, let's make sure it really is a duplicate. The OP linked the original question, and stated the solution there did not solve his problems. I would prefer to see us investigate the question, root out the real problem, and possibly retitle this to better depict the issue at hand. In the end, I think that is a better approach to simply closing as a duplicate, as it would provide better internet search results, and possibly head off additional questions about the same thing if people can find the right answers for different, yet similar (not duplicate), issues.
comment Why can't I use my 64 GB SD card in my Nikon D60?
Just insert a new card without formatting. These cards are usually formatted right out of the box. See if that works. I have never formatted any of my memory cards even once, and I've never had any problems across multiple Canon and a Sony camera.
comment How does Jefry Chandra edit his photos?
I think there is also some kind of soft contrast technique applied here as well, which is more than just curves.
comment Screw-in or square filters in the field?
It was definitely ProGlass...given that it slipped out of my holder a couple weeks ago and broke. :(
comment Screw-in or square filters in the field?
Try this:… The price seems to have jumped considerably. I bought mine years was definitely not that expensive.
comment What lens design limits derive from the width of the lens mount?
...when your flange distance is very short might help alleviate some of those concerns. However, even with (and maybe more-so with) a large exit pupil, the light for any given point on the sensor that comes from the opposite side of the lens will ultimately cause vignetting due to the pixel structure. It may not be a lot, but it will diminish sensitivity. A longer flange distance ultimately improves the collimation of light reaching the sensor, which alleviates those problems.
comment What lens design limits derive from the width of the lens mount?
I don't know that there is necessarily a limit, not within reason. So long as the light "cone" is in focus by the time it reaches the sensor, that is all that matters. You could narrow the cone at the last element...or you could enlarge it. Whatever is necessary to support the entrance pupil of the mount. Problems ultimately arise when the flange distance is very small. In mirrorless cameras, it actually becomes a challenge to bend light the right way to reach the periphery of the sensor, and at an angle that is conducive to the photodiodes actually receiving light. A larger exit pupil...
comment How to share large number of photos for review by family, with comments saved with the pictures?
I don't think your going to find software or a web site that does exactly what you want. To my knowledge, there isn't web-based "get comments first" software that can archive a library of photos to disk. There are PLENTY of ways to share photos online for comment...however you'll likely have to handle the burning of the images, and their companion comments, to disk yourself.
comment What are the pros and cons of saving as DNG in camera and saving as proprietary RAW and convert in lightroom in post?
Hugo, there is no difference between converting to DNG during lightroom import, and shooting directly to DNG in camera. No difference, that is, other than the glaringly obvious. I am honestly not sure that you are asking anything unique here that isn't already covered by the other topic that mattdm linked. If you have a truly unique question, one that you do not already know the obvious answer to, please edit your question to ask it. Otherwise, I'll need to close this as a duplicate.
comment What, technically, is happening when one adjusts the 'Exposure' setting in a raw editor?
I am not sure we can get a good single answer to this question, and certainly not a technically accurate one for all major RAW editors (given that some use proprietary technology.) I know that RawThearapy tends to be fairly linear in many of it's adjustments, where as Lightroom is most decidedly non-linear (i.e. adjusting exposure shifts the middle range of tones more than it does the highlights and shadows.) This question may be difficult to answer adequately.
comment What was done to this photo to get a surreal tone of pastel-like purples and blues?
user28116: You should write your own answer, as I think you nailed it on the head. Magic was done in real life with light, not in post. You deserve and up-vote and an accepted answer. ;)
comment Applications of dynamic range trick
I am not sure that this question is a good fit for our forum. It's fishing for other people to come up with answers that they cannot already know and which cannot be researched. As such, it really isn't exactly a question, it's a work order. Is there any way you can turn this into an actual question that may have benefit for the photographic community at large over a long duration of time?
comment Why can't my camera autofocus in low light with a small aperture?
Don't make the mistake of assuming the performance of your NEX is indicative of all cameras and all brands. I use a Canon 5D III with the EF 600mm f/4 L II lens. I never missfocus, focusing in BLAZING fast, and it's DEAD ON every time. Canon's current 61pt PDAF sensors are top of the line, with very high precision and accuracy, with an extremely low miss rate. Mirror-slapping DSLRs are highly refined devices, and PDAF is not a handicapped mode of AF operation...when done right, it's simply the best way to do AF these days.