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| View Poll Results: Important foctors contributing to a good Aquatic Photo | |||
| ISO is most important |
   
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3 | 17.65% |
| Aperture is most important |
  
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3 | 17.65% |
| Shutter is most important |
  
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3 | 17.65% |
| Lighting is most important |
  
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15 | 88.24% |
| Focusing speed of the camera is most important |
  
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8 | 47.06% |
| Photographer + Patience is most important |
  
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9 | 52.94% |
| Other contributing factors to a good Aquatic Photo |
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3 | 17.65% |
| Multiple Choice Poll. Voters: 17. You may not vote on this poll | |||
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Thread Tools | Display Modes |
18-08-2008, 09:14 PM
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#1 |
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Guest
Posts: n/a
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The X-factor in obtaining an excellent aquatic photo
Please poll and/or add more comments.
Contribution with photos is most welcome. personally, i chose good lighting and focusing speed cos usually i like to use "autofocus" and "shoot" the fish before it swims away with good lighting, i do not need to worry about iso, aperture or shutter Last edited by slooow; 18-08-2008 at 09:37 PM. |
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18-08-2008, 11:07 PM
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#3 |
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Moderator
 
Join Date: Mar 2004
Posts: 7,140
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How come no vote for type of equipment ?
1DsMK3 solve all the problems 
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18-08-2008, 11:39 PM
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#5 | ||
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Guest
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Quote:
 i forgot about "timing" also  [timing your perfect shot] guess usually i just point and shoot Quote:
Do remember to share your photos + techniques
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19-08-2008, 01:16 AM
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#6 |
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Guest
Posts: n/a
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I am still using an old D70s, set to 3D Matrix metering
And with this, the camera determines that the correct overall exposure should be 0.125sec @ f/2.8 While maintaining this exposure, I took two more photos at f/8.0 and f/22.0 to demonstrate the effect of a bigger f/number. Two things are affected. - the exposure time is increased f/2.8 ----->0.125sec f/8.0 ----->0.777sec f/22.0 ---->6.000sec - the rock behind the watch gets sharper as the f/number gets bigger this is because of the Depth of Field. It gets bigger and anything within this depth becomes sharper. With this, we can conclude that maintaining the smallest f/number will maintain the faster shutter speed too (although DOF is narrower) 
Last edited by slooow; 19-08-2008 at 02:32 AM. |
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19-08-2008, 01:51 AM
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#7 |
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Guest
Posts: n/a
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The faster the shutter, the better it will be for fish photography
This is because the fishes will swim and move away, unlike my watch. Hence faster shutter means less blury photos due to fish movement. Setting a faster shutter is most desired but it causes the image to be underexposed At f/2.8, how much faster can i push the shutter? As mentioned, 0.125sec + f/2.8 is the ideal exposure set by my trusty D70s From the images below, you can see that they are underexposed as the shutter speed increases from 0.125sec ---> to 0.066sec ---> to 0.001sec (photos were maintained @ f/2.8) 
Last edited by slooow; 19-08-2008 at 02:32 AM. |
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19-08-2008, 02:31 AM
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#8 |
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Guest
Posts: n/a
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So far, smaller f/number (f/2.8) is known to allow faster shutter speed.
However, f/number does have its limitation (unless you buy a brighter lense at f/1.8 or f/1.4 eg..) Increasing the shutter beyond the stipulated speed (0.125sec in my situation) will cause the image to be underexposed as demonstrated. There is one more aspect of the camera to adjust. It is known as the ISO. By increasing the ISO, the sensitivity of the sensor is therefore increased. The higher the ISO setting (the more sensitive the sensor) results in brighter photos. This ideally allows f/2.8 and faster shutter speeds. iso200 @ 0.125sec iso800 @ 0.025sec iso1600 @ 0.012sec And nothing comes free, having a higher ISO will cause severe noise. It makes the photos grainy. Although it does give a higher shutter speed at the end of the day. 
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19-08-2008, 03:24 AM
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#9 |
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Guest
Posts: n/a
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Having demonstrate the effects, and limitations, of f/number + shutter + iso...
We can safely say that there is nothing else we can adjust on the camera for a brighter, clearer and sharper photo (unless you buy a better lense or better camera). Hence i chose better lighting. The above "test photos" are all taken with 1x normal taiwan-made fluorescent tube (brandless pink tube 40w] The following photos will be taken 4x normal taiwan-made fluorescent tube (mixture of brandless green blue pink red tubes each 40w) played around with f/number + shutter + iso... and finally here are the photos (no use of flash) photo 01 photo 02 photo 03 photo 04 photo 05 Last edited by slooow; 19-08-2008 at 06:47 AM. |
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