• 01Nov

    — in progress post — (hope to finish this week) — Here are my initial thoughts:

    I tried UniWB to improve determining exposure when shooting RAW using the RGB histograms.

    The idea behind uniWB is that it addresses the problem with the limitations of the histograms produced from shooting in “normal” mode (not using UniWB). The normal histograms show clipped channels, over-exposed areas, blown whites with no detail as right leaning histograms even if they do have detail in the actual RAW. This is because the histograms are determined using the in-camera generated JPG – which has a smaller dynamic range than the original real RAW.

    So far, I don’t think I like it, I prefer using spot metering, with the in-camera meter and then the Zone system. I am going to post more details about this approach and my results in my blog shortly.

    Tags:
  • 26Sep

    Wouldn’t you like to explore your environment through a microscope? I have wanted to this for a while and been intrigued by the world of Super Macro Photography for over a year now.

    Super macro magnifies subjects and enables you to see the details of the eye of an insect or the texture of a hundred dollar bill or each pollen stuck to a bee’s leg.

    It is surprisingly easy to do – all you need is  (1) a camera (duh!), (2) two lenses and (3) a coupler attaching the two lenses face to face.

    The two lenses should be a combination of a wide angle lens and a longer focal length lens attached face to face.    I used a 105 mm  lens attached directly to the camera and a fifty at the outer end attached in reverse.  The lens directly on the camera (the 105) is in the regular position on the camera and the fifty is attached via a ‘reversal coupler’ facing the camera. The coupler allows me to screw on the fifty like it is a filter.

    Here is a link the coupler that I used (a male 52mm-52mm) – it attaches on the filter end of the fifty. I also had to use a step down ring to fit the thread on the 52mm coupler to my 105 at 62 mm (see this one here). That one attaches to the male coupler and to the filter end of the 105. Although not necessary – I also put an adaptor on the ‘reverse’ end of the fifty so I could put a protective filter on it because I felt is was exposed to the elements.  I got a Nikon BR-3 to allow for that (see link here). After attaching lenses, rings , and filters – make sure that the lens closest to the camera is set to manual focus (the 105 in my case) and the aperture on the outer lens (in my case the fifty) is wide  open – i.e., the dial is set to  (f/1.4 to f/2.8) to maximize the amount of light entering the lens while avoiding vignetting (so f/22 would be too small of a aperture – and surely would create a heavy vignette). … the focusing was strange, you have to be very close to the subject (just an inch or so) and  the DOF was super thin.  I found Nikon’s Live View handy for this.   I also used a tripod since again – the DOF was so thin – and I wanted to avoid camera shake. You may want to use a flash to allow more light and freezing any movements – I used an off-camera speed light to avoid sharp shadows.

    Summary of  Equipment (as attached from  the camera and outwards)
    • 1 dSLR (e.g., D300)
    • 1 long lens (e.g., 105 mm lens)
    • 1 step down ring (if needed)
    • 1 coupler (52-52 mm  male filter)
    • 1 ‘wide or normal’  lens (I used the 50mm f/1.4D)
    • 1 (optional) lens protection kit of outer lens (BK-3) with 52 mm UV filter.

    My  complete setup:

    From left to right:  A D300, a long lens (105mm for my setup), a step down ring (from 62mm to 52mm), a 52mm-52mm coupler ring, a reversed ‘wider’  lens – I used the 50 mm, and then finally the optional kit , consisting of  an adaptor, Nikon’s BR-3, allowing my to attach a filter on the far end of the fifty and a  52mm UV filter.

    Blogs and web pages that helped me get started:
  • 06Sep
    Categories: Geeking Comments: 0

    A quick entry (and test). I just installed “ScribeFire” in my browser to ease the process of doing blog entries – and it works!

    It is a lot easier and more enjoyable to use. I am going try to write more entries, here now. Next up will be an entry (with pictures) on reversing lenses.

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  • 08Jun

    I finally decided to clean up the disk space that is currently distributed on 3 computers and 3 or 4 external drives.  I have a Mac Pro and a MacBook Pro – and I will use the Pro for performance and as a “home” for my data and software.

    The Mac Pro has 4 bays for disks. The two first bays will be for my two 150G WD VelociRaptors (WD3000HLFS — blackplane ready) for my bootable OS, applications and home directory – I will receive these two disk tomorrow morning from newegg.  The two other bays will be for 2 1T WD’s caviar black disks and they will host images and other media files AND a photoshop scratch disk.  I am considering RAID 0 for these two disks as well, but I am still undecided – maybe it is too risky.

    WDs VelociRaptor 150G SATA disk.

    WD's VelociRaptor 150G SATA disk.

    A Speedy VelociRaptor

    A Speedy VelociRaptor

    My backup will be a three tier process with (1) Time Machine on a Drobo/DroboShare – nightly backup (2) SuperDuper bootable & Media backup weekly – and cycling two external disks and (3) Off-site/backup.   I have three tiers because my main computer will be setup for performance (RAID 0).  Drobo uses a proprietary RAID like system and allows for variable size disks that can be replaced as needed.  The DroboShare allows the DRobo to be treated as network attached storage (with a gentle hack).

    Drobo FW800 & USB 2.0 4 Bay Storage Array with DroboShare

    Drobo FW800 & USB 2.0 4 Bay Storage Array with DroboShare

     

    I will use Shirtpocket’s SuperDuper both to make a weekly bootable copy of my OS and apps and a clone of my media & cycle two disks for each (so a total of 4 disks). I got Other World Computing external firewire 800 disks and also also Western Digital My Book Studio disks to accommodate this cycle.

     

    Shirtpocket

    Click here to get an overview of SuperDuper

     

    For offsite, I am seriously torn (and waiting for suggestions here  and elsewhere). I have a lot of data, close to the terabyte range – and it will continue to grow at a rate of 200-400GB per year. I would like a place that is both reasonably priced and doesn’t take ‘forever’ to transfer the initial copy,  preferable a place that accepts a disk(s) for the initial backup. So far I have looked at, Mozy, Carbonite, Backblaze, Carboncopy and Safecopy. I found this review here via a quick google: