Advertisements
Aquatic Avenue Banner Tropica Shop Banner Fishy Business Banner
Results 1 to 6 of 6

Thread: Glare problem

  1. #1
    Join Date
    Jun 2003
    Location
    Singapore
    Posts
    136
    Feedback Score
    0
    Country
    Singapore

    Glare problem

    Advertisements
    Fresh n Marine aQuarium Banner

    Advertise here

    Advertise here
    Hi i'm new to digital photography, and would like to seek some pointers here.

    <img src="http://web.singnet.com.sg/~darkkon/Glare.jpg">

    This was taken with a Canon A70 set to the "Fast Moving Object" mode. I understand that the shutter speed in this mode is faster and hence will reduce glare. I also disabled the flash. However i still cannot get rid of the very prominent white patch of glare on the top. Any advise?
    ============================
    NEON TETRAS WOULD BE PERFECT IF NOT FOR THE ^#&*!()%@^&@%# NEON TETRA DISEASE!!

  2. #2
    Join Date
    Dec 2001
    Location
    Tampines, Singapore.
    Posts
    7,920
    Feedback Score
    0
    Images
    7
    Country
    Singapore
    well, probably a polarising filter will help, but I'm not sure if the A70 can accept any add-on filters. also do you have white balance setting on your cam? make sure it is set to florescence. You can also meter the exposure at the brighter area by aiming at a brighter area and half-pressing the shutter release, then recompose the picture while holding the shutter release. however this may also cause your focusing point to be off. some cam has a separate exposure lock, which allows you to meter the exposure, recompose and focus, then snap. best to RTFM.

    if you mail me the picture I could try some photoshopping
    why I don't do garden hybrids and aquarium strains: natural species is a history of Nature, while hybrids are just the whims of Man.
    hexazona · crumenatum · Galleria Botanica

  3. #3
    Join Date
    Jul 2002
    Location
    Beauty World
    Posts
    7,114
    Feedback Score
    0
    Images
    789
    Country
    Singapore
    ----------------
    On 10/25/2003 10:20:08 PM

    This was taken with a Canon A70 set to the "Fast Moving Object" mode. I understand that the shutter speed in this mode is faster and hence will reduce glare. I also disabled the flash. However i still cannot get rid of the very prominent white patch of glare on the top. Any advise?
    ----------------
    Hi Darkkon,

    What you have is over exposure, not glare. Glare is stray light entering your camera resulting in a section with muted colors.

    Faster shutter speed does not remove glare.

    Faster shutter speed only allows a shorter time for light be recorded on your media, which in this case is the CMOS. This will prevent motion blur from your subject when it's 1/60 secs and above.

    Disabling flash does not remove glare.

    Disabling the on camera flash will prevent hotspot when shooting directly parallel to the front glass pane. If it's the top portion that you are specifically refering to, the flash makes no difference to that portion, which is caused by your tank lighting.

    What reduces glare?

    A lens hood will reduced glare and flares. Most compact cameras (digital or film) does not use this device.

    How to get a better picture in your case

    1. Learn how to use the white balance on your camera. It will make your picture less sickly green as 6000K to 8000K lights have a greenish cast which the human eye compensate automatically.

    2. Use a tripod or any other form of steady support.

    3. Wear a black shirt and shoot further away if you can. You can see you own reflection in the current picture. Shooting further away will still give you enough resolution to crop down for internet presentation (if that's all you want). You will find that the tank lighting cannot reach far enough to cause a reflection on the front glass pane. Alternatively, you can stick a strip of black paper on the tank lights that just cover the water level. This will prevent stray light from reflecting your image when you shoot near the tank.

    4. Position your camera slightly lower will reduce the visual impact of the white portion as it will not be visible from that perspective. This will effectively reduce the white portion, but not entirely.

    5. If the portion is not a critical part of your aquascape, you can consider trimming it. Any floating plants or stem plants trailing on the surface will always have this over exposure problem as it's nearer to the light source. If it is an important part, then putting 2 powerful slave flash on each side of the tank and reduce the shutter speed will reduce the amount of light reaching that part of the tank and in turn reduce the over exposure. The slave flashes will ensure the rest of the tank gets adequate lighting for the overall picture. The slave flash option may not be financial logical if you only want to take pictures of your tank occasionally.

    Try the above and see if you can get a better picture. If not, take a picture of your tank setup, including the lights and a close up section of the plants at the surface and we will show you how to resolve it in more detail.

    Cheers,
    I have dwarf cichlids in my tanks! Do you?

  4. #4
    Join Date
    Jun 2003
    Location
    Singapore
    Posts
    136
    Feedback Score
    0
    Country
    Singapore
    Wow! That sure was a lot of helpful tips and advice! Thanks for even bothering to type so much, benny! Thanks a lot to hwchoy! Seems that digital photography is not as simple as i thought! [:]
    ============================
    NEON TETRAS WOULD BE PERFECT IF NOT FOR THE ^#&*!()%@^&@%# NEON TETRA DISEASE!!

  5. #5
    Join Date
    Aug 2003
    Location
    singapore
    Posts
    145
    Feedback Score
    0
    Country
    Singapore
    ----------------
    On 10/26/2003 2:35:14 AM

    Seems that digital photography is not as simple as i thought! [:]
    ----------------
    But digital photography allows you take LOTS of pics without having to pay for the proce$$ing & printing fee$, and lets you discard the ones that you don't like. Best of all, it allows you view the pic that you've just taken. This is the best INSTANT feedback. Then you can play around with the settings and note what works for you!

    Have fun!
    ckchua

  6. #6
    Join Date
    Jul 2002
    Location
    Beauty World
    Posts
    7,114
    Feedback Score
    0
    Images
    789
    Country
    Singapore
    Hi guys,

    I do agree that one of the greatest strength of digital photography is the cost savings from purchase of film and the subsequent development. On the average, it will cost me around S$20 per roll of film plus development (based on ASA 200). Over the last year, I have shot around 4500 pictures on my digital camera, which is about 125 rolls. This would have already costed me S$2500 if I had used film. To me, the cost and time savings justified the investment.

    As there is little cost (don't forget your print out) associated with photo development for digital photography, together with instant preview, I do find that I shoot more and from there, improve with different settings and arrangements during the shoot itself. I used to need about 30 to 40 shots before I get it right. Now, I only need about 5 shots to caliberate the camera for the whole shoot most of the time.

    So for those of you with digital cameras, go shoot more and share your pictures of your aquarium, fishes and plants!!

    Cheers,
    I have dwarf cichlids in my tanks! Do you?

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •