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uw_nikon

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Posts posted by uw_nikon


  1. You should be able to turn off the your MacBook Pro's dynamic screen brightness. (sysPrefs/Displays)

     

    Most monitor calibrators will calibrate screen brightness when set to advanced mode.

    (note: high screen brightness will amp the colors way up. But, the colors get pretty whacked.)

     

    If you're serious about color, consider using an non-Apple external monitor connected via DisplayPort (I've used the Dell 2408wfp, U2410, and currently U3011). In advanced mode, you can calibrate RGB and contrast before the color calibration occurs. That makes the monitor's color profile as good as you can get it.

     

    Take Care,

    ChrisS


  2. observations:

    -probably shot with one strobe w/a diffuser

    -no backscatter (good job in temperate water)

     

    my opinions:

    good: 5 (lighting, composition) and 2 (lighting, composition, good negative space: not sea barf; cropped too tight: more space in from of fish, back edge of gill cover cropped)

    neutral: 4(good detail, lighting, & negative space; form of nudi eggs: hunt for better spirals; cropped too tight)

    things to work on: 3(good detail on navanax face/head, kind of a C-curve; very distracting negative space: too much sea barf), 1(distracting foreground, no space in front of fish), 6(pogo stick shot* on so-so negative space)

     

    *pogo stick shot = camera pointed straight down on subject (I like to shoot tube anemones out on the sand flats and get the tentacles flowing in the current/surge)

     

    get low, get close, get closer, shoot up (this separates your subject from the sea barf background)

    eye level or slightly below your subject (make it a conversation)

    search for good background first; then look for subjects on that background

    crop in the viewfinder, not in the computer (I'm kind of old school. I prefer the 35mm aspect ratio instead of freeform cropping.)

     

    take care,

    Chris


  3. Curious if anyone has experience with the newer Thunderbolt display and/or a better display that they own?

     

    I have the Dell U3011 connected via DisplayPort.

    -better calibration

    -larger color gamut (see attached profiles created with i1 Display2; the snow leopard version of the calibration sw allows much better tweaking of u3011 monitor)

    -anti-glare (I wish Apple would get away from the glossy screen look. Yes, it makes very clean packaging and better color saturation; but, there's way too much reflection from the screen in most lighting conditions)

     

    Apple Thunderbolt Display profile:

    post-6274-1329685928.png

     

     

    Dell U3011 profile:

    post-6274-1329686930.png

     

    The Apple Thunderbolt display has a huge advantage _only if_ you have a 2011 MacBook Air and need FireWire, 1000BaseT Ethernet, and three more USB2 ports.


  4. First, look at your Sony HD video camera (or it's manual).

    Search for an iLink connection (that's what Sony calls FireWire/1394).

     

    If you camera has iLink, you could buy a FireWire 800 to 4-pin FireWire cable to connect your camera and iMac. ($10 to $15)

     

    I don't know what formats iMovie supports for import from cameras.

    You can always try connecting the camera via FireWire, launching iMovie, and seeing if your iMac sees the video camera and can import footage.

     

    Take Care,

    ChrisS


  5. There are plenty of bad images taken with superior equipment.

    I've seen people shoot 400+ images in a day of diving and get 2 or 3 decent images, nothing outstanding.

    (Your pencil draws pretty images. Not really true.)

     

    For:

    composition

    vision

    capturing the moment

    exposure

    point of focus

    lighting, etc.,

    it's the photographer not the equipment. (knowledge and experience)

     

    Great optics can provide an edge (but, without applied knowledge and experience that edge is very limited).


  6. For the 60mm and the 105mm I use this technique:

    -camera in manual (too many cameras make dumb choices underwater)

    -camera in Single Servo AF

    -f/16 or f/22 for aperture

    -1/250s for shutter speed (max flash sync on my camera)

    -wide angle focus light edge lighting subject

    -press shutter release half way to activate then Lock focus on your primary area of focus

    -recompose

    -depress shutter fully

    (note: some cameras will not fire if AF sensor says image is not in perfect focus; this can be very frustrating in surgy conditions; most cameras can be set to fire when shutter release is fully depressed regardless of AF status)

     

    another trick when shooting closer than to 1-to-2 (half life size on sensor):

    -pre-focus

    -set camera to manual focus

    -use careful bracing and body movements to get your images (become a human macro rail)

    (note: camera will fire regardless of what the AF sensor tells it when in manual mode)

     

    remember, depth of field is shallow when shooting macro, the closer to 1-to-1 you are the shallower it gets; 1/3 in front of perfect focus and 2/3 behind perfect focus.


  7. I have a Nikon D40X with a Sea and seaand sea case RDX-D60

     

    The D40X requires AF-S lenses to autofocus (AF motor built-in to the lens; the camera body has no focus motor to drive standard AF lenses).

     

    Maybe,

    -nikon 10-24mm AF-S f3.5-4.5G

    -sigma 10-20mm f4-5.6D

     

    plus zoom ring and 8" dome port.

     

    Another thing you could consider:

    -buy a low cost Manual focus or standard AF (not AF-S) lens

    -pre-focus it to the distance range you want to shoot

    -use the view finder to check focus before you shoot

     

    Take Care,

    ChrisS


  8. Just to ask about focussing for pin sharpness on macro.

    I am using the autofocus mode on my macro lenses- on the camera body I am using single focus point mode- but have now started to switch the focus mode into manual to stop the lens hunting and am trying this 'move back and forth' technique with some success(?).

     

    I cant use exposure or focus lock on my hosuing cause the button is not accessible on my DX-D200 housing.

    Txs in advance guys

     

    A couple of methods:

    both require:

    -a focus light (or diving in clear shallow water)

    Note: I use a wide beam focus light to edge light the focus area, the main hotter area of the beam is used to spot subjects from a distance.

    -flash sync to Rear curtain (flash button on left side of pentaprism, use back command dial until flash mode in LCD reads Rear)

    -f16 to f22

     

    #1:

    -single servo mode AF

    -single point focus (normally, the center point)

    -maybe, change AF-S mode priority to Release (menu= pencil/a/a2/"Release")

    Note: allows you to take shot with out camera locking you out when AF point thinks focus is bad. (AF-C is defaulted to "Release")

    -focus on what you want tack sharp by pressing shutter release halfway and keeping it half pressed (locks focus until full press)

    -recompose shot for final composition

    -pay attention to depth of field (it can be very shallow when shooting 1:1 a 3-4 mm; maybe 10mm when shooting 1:3; one-third in front of optimum focus point and two-thirds behind will be "in focus")

    -move camera in and out to achieve focus

    -take the shot by fully pressing shutter release

     

    #2:

    -decouple shutter release and AF activation

    -set the AF activation to the "AF-ON" button on the back of the camera (menu= pencil/a/a6/"AF-ON Only")

    -maybe, change AF-S mode priority to Release (menu= pencil/a/a2/"Release")(see note above)

    -set focus point and mode to whatever you want

    To shoot:

    -press AF-ON and get initial focus

    -release AF-ON (focus is locked)

    -recompose

    -pay attention to depth of field

    -move camera in and out to achieve focus

    -shoot by pressing shutter release

     

    Note: if your housing doesn't have access to AF-ON button, use single servo to focus on something of similar size, then switch camera to manual focus mode locking focus.

     

    Take Care,

    ChrisS


  9. I tried with Keynote '09 version 5.0.3 (791) on 10.6.4 by dragging QT movies from a finder window to a Keynote slide. That copies/embeds the dragged QT movie into the Keynote presentation.

    result: aspect ratio doesn't change (16:10 movies stay 16:10)

     

    Using the "Media" palette (near upper right corner of Keynote's main window, 3rd icon from right), appears to work correctly also.

    result: aspect ratio doesn't change (16:10 movies stay 16:10)

     

    Using menu: Insert/Choose..., same results.

     

    Hmmm...

    The movies you're importing don't happen to be a video format with non-square pixels?

     

    Take Care,

    Chris


  10. You cannot use the camera's LCD to judge exposure.

    (turn the LCD illumination to minimum gives you a very slightly better idea of exposure)

     

    Instead use the RGB and combined histograms to determine if you have correct exposure. (histograms crashing in to the righthand side are over exposed, crashing into lefthand side are under exposed, there are no ideal histograms.)

     

    for wide angle:

    Red = flash exposure

    Green = ambient light (in most temperate waters)

    Blue = ambient light (in most tropical waters)

    Balancing strobe and ambient light can be tricky.

     

    Get used to shooting in manual mode. (most, if not all, cameras make very dumb mistakes when shooting underwater in program mode)

    Have a start point

    i.e., ISO100, f/8, 1/30s, strobes at 50%

    and adjust from there depending on conditions and which way you are pointing the camera relative to ambient light direction.

     

    To adjust red histogram: adjust strobe power, adjust strobe distance to subject, or add diffuser to strobe.

    To adjust green/blue histogram: adjust shutter speed (higher = darker, lower = lighter)

    You may have to increase ISO if you dive deeper.

     

    Also, use the "blinky blacks" to look out for highlight over exposure.

     

    Take Care,

    ChrisS

     

    hi, this is my 1st time using d90 for u/w shooting. When I shoot at u/w every thing is look ok from my LCD screen " as what I want " but when I down load to my computer my jpg totally look different "under explore" and I open my raw file even worse?

  11. Lack of delicate feel is normal for thick gloves.

     

    A possible solution:

    -buy a pair of 3mm gloves

    -on your thick glove (I assume the right one because the shutter release on most housings is on the right), mark between the base of finger and the first joint out from the base on glove's index finger.

    -cut off index finger on the thick glove at the mark (make a careful straight cut)

    -cut off one of the fingers on the 3mm gloves at the base so you have plenty of adjustment room (you've have 7 spares to use in the future)

    -put on your right thick glove

    -do test fits and trims of the 3mm finger until you reach the correct length of the new 3mm replacement

    -use wetsuit/neoprene glue to attach the 3mm finger to your thick glove

    -allow the glue seam to dry completely

    -think about doing some careful surface stitching to keep the nylon facing of each part from pulling the seam apart

     

    Take Care,

    ChrisS

     

    PS, I use five-finger 4mm skin-in gloves for all my cold water diving (Monterey, SoCal, and BC); I also dive a dry suit.


  12. For a FF, it depends on what you want to shoot.

    -nikkor 16mm AF f/2.8D fisheye is a great uw lens

    -nikkor 18mm AF f/2.8D rectilinear another great uw lens

    -nikkor 17-35mm AF-S f/2.8D rectilinear very flexible

    -nikkor 24mm AF f/2.8D lots of fun for sealion shots

     

    I shot all those with film behind an 8" dome.

     

    I haven't shot the nikkor 14mm AF f/2.8D.

    (it is a FF lens; but, it was probably designed with 1.5x crop factor in mind,

    21mm is very close to 20mm which behind a dome has about the same coverage as the nikonos 15mm)

     

    There are wetpixel threads covering the nikkor 14-24mm.

    I would bet, the 14-24mm beats the 14mm for image quality. It trumps it completely for flexibility.

     

    I don't know if you would need a huge(9.25"), high-quality, glass dome to make the 14mm and 14-24mm reach their full potential.

     

    Take Care,

    ChrisS


  13. No two external screens are possible on MacBook, Macbook pro or the iMac.

     

    Hmmm... maybe, the wording should be changed to:

     

    "The MacBook, MacBook Pro, and iMac only support one external screen (upto 2560 x 1600) with their Mini DisplayPort interface (and mini DisplayPort to <DVI, HDMI, VGA> adapter or DisplayPort to Mini DisplayPort cable)."

     

    Firewire 800 is supported on MacBookPro and iMac; but, not on the current generation MacBook (white unibody) which only has USB2.

    note: MacBookPro and iMac only have one FW800 port (you can daisy chain external drives and video cameras); the current Mac Pro has four FW800 ports

     

    As Jules said:

    It really depends on your workflow.

    Many high-end video people have two machines:

    -a portable to log footage on the road, xfer footage to harddrive(s), review what they shot, and project manage their video projects

    -a desktop (with all the fancy post processing PCI cards) to do hardcore editing.

     

    Take Care,

    ChrisS


  14. Hi Espen,

     

    I have a calibrated profile from both:

    -17-inch MacBookPro (Early 2009)

    -LaCie electron22Blue IV (CRT monitor)

     

    They have very similar gamuts. (MacBookPro's is very slightly larger)

    Both calibrate well with xrite Eye1 Display2 (output curves on LaCie are better because it has more manual controls)

     

    Look at attached image for visual comparison.

     

    Take Care,

    ChrisS

    post-6274-1256749838.jpg


  15. I'm pretty sure, this question was answered before.

     

    my criteria:

    -mask fits your face (this is #1 for any mask)

    -black silicone skirt (knocks most of the glare down, much easier to look through the view finder)

    -low volume (glass is closer to your eyes, good peripheral vision, easier to clear)

     

    One other note:

    some of the ultra-low volume freediving masks have molded plastic lenses which might be more easily scratched the the standard tempered glass lenses that most masks have.

     

    For me, the Cressi-sub Super Occhio works best.

    For you, go to your local dive store and try on low volume masks.

     

    take care,

    ChrisS

     

    So, the question is:

    What is the best mask to use with SLR housings? (for those who do not wish to invest in a magnifying viewfinder, of course)


  16. <snip>

    K. Rockwell claims different working distances, both being shorter and the difference between the lenses being 1".

     

    For underwater photography, 1:1 with either 60mm is almost a moot point.

    -subjects have to be brain dead to get that close

    -very difficult to light the subject with the flat port pretty close to squishing it against the glass/plexiglass

     

    I did a quick experiment with my D200 and the 60mm AF-D

    -set the 60mm to 1:1 (manual focus)

    -move camera perpendicular to a flat vertical surface

    result:

    minimum focal distance = 8.5" (216mm)

    --focal distance is from film plane to subject

     

    minimum working distance = 2.875" (73mm)

    --working distance is from front element of lens to subject

     

    subtract another 15-20mm for your port and you're down to 53mm (about 2")

     

    --ChrisS


  17. Hi Jeremy,

    I have around A$500 to spend and i am processing photos for making various sized prints for people to purchase.Will also be displayed on a web page.

     

    What about the Dell 2408wfp?

     

    I have one at work.

    1920 x 1200

    pivots between landscape and portrait

    It calibrates well.

    Lots of ports:

    -DVI (2)

    -DisplayPort

    -HDMI

    -composite

    -VGA

    -4 port USB hub

    -2 card reader slots (CF, xD, SD, MS, MMC)

     

    around $400 US on sale from Dell (check dealmac.com)

     

    Take Care,

    ChrisS


  18. The real solution is to:

    -make your rig close to neutral in the water (slightly negative)

    -floatation strobe arms

    -floatation collar for macro port

    -balance your rig

    -domes ports tend to want to float the front of the camera toward the surface (small weights can be stuck to the back of the dome; i.e., alloy wheel balancing weights)

    -macro ports tend to make the housing nose heavy (floatation collar; James did a thread on that)

     

    Take Care,

    ChrisS


  19. How do you steady the camera to prevent blur at 1/30s?

     

    1/30s is not that slow for wide angle.

    (some people even go down to 1/15s; I shoot in Monterey, home of green water and kelp canopies , 25' vis is a good day.)

     

    The mass of the housing, arms, and strobes provide pretty good stabilization for shooting at 1/30s.

    Also, the strobe freezes the action. Although, unless you're shooting something fast (i.e., sealions) you shouldn't have to worry too much about freezing action. Lots of slow and non-moving subjects.

     

    If you want to shoot faster, up your ISO.

     

    Take Care,

    ChrisS

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