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Long Exposure and Noise

July 9th, 2010 No comments

It’s a strange thing, but take this little bit of gem that I learned today. This is really only going to be a problem for night time celestial photographers (although I’m sure there are other instances that I cannot think of at the moment).

Comparatively, a single shot at relatively faster speed at 1600 ISO will have less noise than 20 shots at a lower speed with ISO 100, stacked on top of each other.

Yes, I didn’t believe it either. It all has to do with the randomness of noise and how the sensor actually deals with the noise. The random effect that is produced and is doubled and duplicated during stacking will make produce an image that has more noise than if you had taken a single shot at a higher ISO. I’m sure there is a cross over point at which this is more prone and even more true, but I have not done enough testing and reading to be able to tell you what that is, but for now know that 1 shot at a higher ISO is usually less noise then a stacked of images at a lower ISO.

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Photographying hummingbirds

July 4th, 2010 No comments

I wrote this for a meetup group, thought I would post it for everyone.  I’m hoping someone can get something out of it.

Please remember this is just my recommendations. This is the stuff that has or has not worked for me in the past. There is a better than good chance that you walk away with no photographs of a hummingbird. That’s just the way wildlife photography is. Out of maybe 1500 attempted bird shots (2126 frames, which I imagine about 500 are nature and macro shots) that I’ve shot at the sanctuary, I can honestly say I kept about 100 of them, and only like 6 of them. Only one has ever been sold or won anything. So keep all that in mind.

Why the hardware limitations, and what they mean:
Let me explain what has worked best for me:
I’ve tried it every which way, I even tried hand holding a 200mm f/2 lens once. That was not a fun day

You setup your camera on your tripod, and setup your exposure, white balance, lock in your aperture and shutter speed, you prefocus your lens and basically setup on a particular flower.

Now you sit there, and wait somewhat quietly AND WITHOUT ANYONE moving around, with your remote control in hand. Sooner or later the hummingbird comes to the feeder and when the feeder is not there they go for the most available flower. You click away until the bird leaves.

Why the distance:
Hummingbirds are extremely skittish and fast as lightning. What we have to do is NOT be a danger to them.

  • Movement is danger. That’s why you don’t want to swing your lens around from flower to flower.
  • If you’re too close you’re a danger. That’s why we’re going to sit far away.

Why the limitations on the short lenses:
These birds are small, inches as a mater of fact. If you’re 10 feet away, and you’re trying to photograph a bird that’s 2.5″ long and moving like greased lighting you need something at least in the vicinity of filling a 1/5th of the frame up with that bird to even get a chance of a decent picture. To give you an idea. Put two DD batteries on top of each other (AA will do in a pinch :-) ). Now go stand 10 feet back. Now try to compose a shot with a 200mm lens. That’s what you’re shooting.

You should actually bring a macro lens and a wide angel lens with you, just in case the birds don’t show up. That’s what is left to shoot there if no birds come.

Back to the suggestions:

WITH OUT flash:
1) Lens, focus on the flower you are setting up at, change your lens’ focus to “Manual Focus”. LOCK down your tripod.
2) White balance, (or just shoot RAW). The side of the 2nd building is pretty close to white, you can use that as your base.
3) Av, or Manual mode
4) F/Stop — f/11 (f/7.1 works as well) is a good starting point. == Why @ 9 feet a 300mm on a crop body at f/11 gives you Depth of field of 1″. Which is 0.5 inches in the back and 0.5 inches in the front of your subject.
5) In Manual — go for Shutter Speed, the maximum you can do. If you’re shooting RAW you can under expose by 1 stop and still bring it back with a little noise. When in doubt go for higher speed to freeze the bird. Don’t even imagine that you’ll freeze the wings this way. You won’t. Not even at 1/8000th.
6) If you have high speed drive, switch to it. You want the camera to take as many shots as it can as you press down on the remote.

WITH flash:
1) Lens, focus on the flower you are setting up at, change your lens’ focus to “Manual Focus”. LOCK down your tripod.
2) White balance, (or just shoot RAW). The side of the 2nd building is pretty close to white, you can use that as your base.
3) Manual Mode on the Camera
4) F/Stop — Start out @ f/7.1 and take a test shot after all of the setup is done and close down until you have a good histogram.
5) Shutter Speed – doesn’t really matter, but if it’s a nice day out go to your maximum sync speed. This is usually 1/200th or 1/250th. This will reduce the sun’s output as much as it can.
6) For the flash power, if you use the flash go to 1/4th power. If you use the camera, start off at -1 1/3 FEC. You want a tiny little flash to go off to freeze the bird that’s it. Increase/decrease based on the output of the histogram and the amount of light from the sun. The more sun is present, the more power you need to freeze the bird. Why? HIGHER POWER = slower recharge time. The slower you can shoot. Last thing you want is your flash to shutdown from the heat.
7) If you have a better beamer, use it. This is exactly the scenario it was designed for. Remember that you have to be using a 300mm or longer lens for it to work.

I’m not going to go into detail on why the Better Beamer is a good choice here, but you can do a search on the web and see thousands of articles on it.

I’ll be happy to answer any questions, on anything above or any other questions you may have.

P.S. FEC = Flash Exposure Compensation, EV = Camera Meter Exposure Compensation (two different things)

Amaryllis Farm Equine Rescue and Sanctuary

July 4th, 2010 No comments
Amaryllis Farm Equine Rescue and Sanctuary

Amaryllis Farm Equine Rescue and Sanctuary

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Avalon Preserve

June 27th, 2010 No comments

A couple of quick images from Avalon Preserve

Sweet Briar Nature Center

June 21st, 2010 No comments

From their website: Sweetbriar Nature Center is a private not-for-profit corporation which exists to provide natural science education services for Long Island residents of all ages and to engage in native wildlife rehabilitation services. Through education and examples, ECSS encourages responsible decision making, appreciation, and respect for the unique wildlife and ecosystems found on Long Island.

The butterfly room does have an additional charge of $3 for viewing/photography and if you like to use a tripod: $10.

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Planting Fields Arboretum

June 13th, 2010 No comments

Had a fantastic day shooting at the Planting Fields Arboretum.   Made some new friends.  The arbortum also had a Rose Show, sadly a lot of the roses were not prestine, although I did a lot of shots, not sure if most are keepers.

Long Beach Go Green Festival & Sand Sculptures

June 11th, 2010 No comments

Some fantastic pieces of art.

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What is the flash sync speed

May 1st, 2010 No comments

What is the flash sync speed?

The way the camera actually operates when doing an exposure is by pulling two curtains across the sensor. This is how an exposure is done in modern SLRs cameras. When the shutter opens the first curtain is pulled across, followed by the second curtain at the speed of the “Shutter”. At “sync” speed, the second curtain follows the first curtain exactly when the entire sensor is open. If your shutter is faster than your cameras sync speed, let’s say 1/500th. The second curtain has started to close when the flash goes off. This usually results in some portion of the image being darker than it should be.

A quick example, let’s assume that the camera’s sync speed is 1/250th. If you set your shutter speed to 1/60th, the first curtain fully opens, 1/60th of a second later the second curtain follows so that the entire sensor is fully exposed for 1/60th of a second. Now let’s assume that you set your shutter speed to 1/8000th. The first curtain opens, as soon as it does the second curtain starts to close as well since it to be able to keep the exposure on the sensor to 1/8000th of a second. That means only a small sliver of the sensor is exposed at any point in time. If there was a “fast” bright source (like a flash) that was introduced only several small slivers portions of the sensor would record that light.

To summarize, the sync speed of any SLR is the fastest speed at which the entire sensor is exposed before the second curtain starts to close.

Most consumer DSLRs have a sync speed of 1/200th, most professional cameras have a sync speed of 1/250th or higher. Some of the really good exceptions are the original Canon 1D bodies which had a 1/500th sync speed which is unheard of now days.

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Lightroom 2.6 and DNG Converter Camera Raw 5.6 have been released

December 17th, 2009 No comments

A update to Lightroom v2 is available from Adobe.

This is specifically a release to deal with:

  • Canon EOS-1D Mark IV
  • Canon EOS 7D
  • Canon PowerShot G11
  • Canon PowerShot S90
  • Nikon D3s

RAW files, but Adobe also included some fixes for a greenish tint issues as well.

You can read and download the full install package from adobe.

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Long Island Dahlia Society

October 5th, 2009 No comments

It’s a little late for this year, but keep an eye on the LIDS’s (Long Island Dahlia Society) website for their next event.  It’s a simply layout but the colors and types of Dahlia’s that they had were absolutely fantastic.  You can see a bunch of the images that I took with just one off camera flash hand-held on site in the full gallery pages.  I’m sure I’ll be including one or two of them in the main galleries as well.  Oh, it is ‘lord of the flies’ in there, so the visitors get to buy Dahlia’s at the show.  I have no idea if these are the rejects or just extra, but nonetheless they’re fantastic.  I bought two large vases, to do a more controlled set of photos as well.

Here is one from the show:Yello Dahlia

Cam&Lens Canon EOS-1Ds Mark II (Canon) & 100.0 mm     Shutter: 1/250 s
Create Date: 2009-10-04T10:44:26-04:00     Aperture: f/4.0
Exposure Mode Manual exposure     ISO: 500
:Flash Flash fired, compulsory flash mode.     Focal Length: 100 mm