Category Archives: Technique

Three-letter Acronyms for Success (TAS), TAS#1: HAC

June 15, 2009Cameras and Photography, Technique, VARIOUSFlowers, philosophyEd Rosack

Well, gentle reader, here’s the grand challenge in front of us…

Can I come up with a series of three letter acronyms for key ideas on how to be generally successful in life, apply them to photography, explain them in a way to make them interesting, and illustrate each with a photograph? If I do this, will you visit this blog and read about it?

I guess we’ll find out the answer together. This series of posts will be somewhat sporadic and I’ll be using them as a filler when I don’t have a photo expedition type of blog entry to post.

Here’s the image that goes with this post – it’s a Christmas cactus bloom:

OK, so let’s get started with TAS # 1. HAC stands for “Have A Clue”. To be successful in life and in photography too, you need to have a clue about what you’re doing. Oh, sure, you can buy a point and shoot camera and take some good pictures, but can you do that under all conditions? Can you do that when you need to, every time? When one of your photos doesn’t come out, will you be able to figure out why and then do better the next time? When you’re in a football stadium or a concert will you be one of the people trying to take pictures with your point and shoot flash going off?

How do you get a clue? How do you know what you don’t know? Take a course or workshop, read books or magazines, talk to someone knowledgeable, join a photography club and ask questions, do research on line, read photo blogs. Try things and see how they come out and then try variations when they don’t work. Learn about the basics of exposure, composition, depth of field. Keep trying and keep learning and don’t give up and don’t expect to get all the answers given to you in 5 minutes.

Once you have a clue, you still need to keep getting more and revising the ones you have, because things change. If you thought you knew photography 5 or 10 years ago, guess what … it’s a lot different now. You have to keep learning. All of your clues are a good foundation for continued learning, but learn you must. For example, if you grew up with film your brain might be conditioned to think of exposure as aperture and shutter speed – film speed was fixed for the whole role of film. Well guess what, now days it’s aperture, shutter speed, and ISO – we can vary the ISO sensitivity for each exposure. You have to keep learning or you might not think about things like changing the ISO.

OK, is that enough words on this? The point is, to be successful you have to have a basic knowledge of what you’re doing and then you have to keep building on that knowledge.

Now, back to the related image at the top of the post. See if you have a clue about what’s going on with depth of field in this image. If you think you know the answer, post a comment. I’ll grade your answers after the TAS #2 blog entry goes up.

To help you get started gathering your clues, here are some photo blogs where you can learn about photography:

Digital Photography School	http://digital-photography-school.com/
Luminous Landscape	http://www.luminous-landscape.com/
Photofocus	(link no longer available)
Nature Photographer magazine	(link no longer available)
Naturescapes.net	http://www.naturescapes.net/docs/
Thom Hogan	http://bythom.com/

Flower show follow up

June 6, 2009Cameras and Photography, Techniqueblack and white, Flowers, OrchidEd Rosack

We bought an orchid at the flower show last weekend. There was some nice light coming through the window this morning, so I decided to photograph it. I spent a little time playing with the image in various ways. Here’s version 1:

White background orchid

I then went back and changed the cloth background and re-photographed it. Here’s version 2:

Black background orchid

And here’s version 3 (a black and white conversion):

Black and white orchid

Look up!

February 8, 2009INSIDE FLORIDA, Techniqueastronomy, moon, night, palm, treeEd Rosack

Well, we had a tripod swap this week, so I went out last night to try my “new” used tripod. I made this photo in my front yard using my D90, Tokina 12 – 24mm zoom, and my new Nikon wired remote release. I set the lens at 12mm, f7.1, and exposed for 25 seconds at ISO 200, using matrix metering. I also set Exposure Delay mode on, Active D-Lighting on Auto, and used Long Exp. NR on. I recorded it in RAW and processed it in Adobe Lightroom. If you click on it, you can look at a larger version.

I like the way the palm tree leads your eye to the constellation Orion in the top right part of the photo, and the wide angle distortion causes both trees to lean in and point up. I also think the dynamic range here is pretty impressive. The moon is completely blown out of course, but the detail in the trees (lit by street lights) along with the how the stars are captured by the sensor in this camera is something I’ve never seen in a photo I’ve made before. Especially with such low noise.

Also interesting is that at 25 seconds, star trails are already visible. 25 seconds = 25/(24*60*60) or ~.1 degree. At 12mm, this lens has about a 99 degree field of view, so .1 degree is about 4 pixels.

By the way, I found out recently that the reason the wired release changed from the D80 to the D90 is that the pin out had to be modified to accommodate the GPS unit. Otherwise I could have kept and used my D80 wired release.

Driving home from the Leo Kottke show

January 25, 2009INSIDE FLORIDA, Techniquebeach, birds, Great Blue Heron, landscape, treeEd Rosack

We had tickets to see Leo Kottke at the Lyric Theatre in Stuart Florida on Friday night. It was a wonderful show – the first time I’ve ever seen him live, although I’m long time fan. In addition to some great guitar music, he told a few very funny stories and we were both sorry to see the evening end.

On Saturday morning we took our time coming back and drove the first part home on A1A up the Atlantic coast, stopping at a few places to look for pictures. I had my photo backpack and tripod with me, and Lynn was a very good sport and even carried tripods and lens hoods for me and helped me scout for photos. She noticed this interesting tree (I think it was a seagrape ) along the beach at one place we stopped at. The early morning sun shining through the combination of new and old leaves and branches on this seagrape tree against the bright blue sky was very colorful. (You can go to my gallery to see a larger version of the photos in this post.)

On the other side of these trees was a little play ground with what I think were some Parrot Fish toys to play on. They were also very colorful in the early light.

Further on up the road, nearer to Port Saint Lucie we stopped at another little park called “Bear Point Sanctuary ” and walked out a dirt road along a canal. This little park is along the Indian River lagoon, and I didn’t realize it stretched this far down the coast. We saw several birds – even though it was almost lunchtime, some calm, scenic water, and some pretty mangroves:

Canal, mangroves, sky (with polarizing filter)

There are a lot of little parks like this in Florida, and if you have time when you’re driving around, it’s worth stopping and wandering around with your camera. You can almost always find a photo or two hidden away.

I used my polarizer filter to make the photo above. One of my friends asked me why they should get one and I wanted to show the effect, so I made a second version with the polarizer rotated 90 degrees. That’s my shadow at the corner of the dock. You can see a pretty dramatic difference between the two versions. Carry a polarizing filter. It’s one filter effect that is very hard to duplicate in post processing on the computer.

Canal, mangroves, sky (without polarizing filter)

The birds were pretty shy and flew off whenever we tried to get close enough for a good picture. (I just had my 16 – 85mm with me).

All in all, a pretty nice photo excursion, and an unexpected bonus well worth the little time we invested.

I posted these photos and a few more on my website here .

Sometimes you take the photo, and sometimes the photo takes you

August 20, 2008Cameras and Photography, OUTSIDE FLORIDA, Technique, Wisconsinblack and white, Cow, skull, travel, vacationEd Rosack

This is the story of a photograph that I made a couple of weeks ago when we were in Wisconsin at the Shalom Wildlife Sanctuary, and how I eventually made a print that I was happy with. Along the way, Lynn laughed at me for taking so much time to print a single photo and my photo friends gave me all sorts of suggestions on techniques to make this come out right (some of which I even used – thanks, Keith).

I knew when I saw this scene that there was a photo here. The lighting conditions were overcast and gloomy – exactly right for the kind of image I wanted, but this made capturing the photo a little difficult. And, it turns out – made printing the photo even more difficult.

I had my Canon G9 with me and used the built in flash in fill mode. I had visions of a 13×19 inch print, so I kept it in ISO 80 and saved it in RAW (like I always do). The skull on the ground looked like good foreground material, so I cranked the lens to the most wide angle setting and got up close to make this exposure (this is straight out of the camera, with no re-touching other than conversion from raw in Lightroom 2)(click on this image for a larger version).

Original photo - straight out of the camera

This is an interesting scene, I really liked the concept of this photograph, but the initial image left a lot still in my imagination. The sky is washed out, the skulls on the pole are way too dark, and the foreground skull is too bright. Also, the grass in the foreground is too bright and distracting (among other things).

I tried various methods over several days to make it work using mostly Lightroom2 and some Photoshop tools. Lightroom2 has some very nice new local adjustment tools which I played around with along with the usual curves, etc. to darken the sky and lighten the pole skulls. I also used the black and white conversion tools in Lightroom2 and generated the version of the photo that is posted in my previous blog entry. This was a lot better than the initial photo, but I thought it could be better. Here’s where Keith comes in. “Why not run it through Photomatix?” he said. “Why didn’t I think of that?” I said. And so …

Here are the steps I went through over several days (some of the steps multiple times – it’s a good thing Lightroom is a non-destructive editor)

1. Basic exposure, clarity, curves, etc. adjustments
2. Create 3 virtual copies of the image – one for the sky, one for the skulls on the pole, and one for the foreground. Adjust each one separately: First adjust the exposure and then convert to Black & White to highlight the appropriate features. Export these as 16 bit .tiff files.
3. Use Photomatix Pro 3.0 to create a combined HDR of the 3 B&W .tiffs, then tone map the HDR file and save.
4. Load the tone mapped file into Photoshop. Clone as needed from the appropriate B&W conversion file to highlight the skulls on the poles. Clone out a portion of the horn on the foreground skull. Crop to the final dimensions. Adjust levels, sharpen for output.

Here is the final image (click for a larger version):

If you want more details on the steps I went through, I’ve posted the intermediate photos for each step at this link .

It is quite a bit different from the original, and it looks pretty good enlarged to 13″x19″ (especially for a point and shoot camera). So I think it was worth the extra effort. What do you think?

Total Eclipse of the Moon

February 23, 2008Cameras and Photography, INSIDE FLORIDA, Techniqueastronomy, black and white, moonEd Rosack

I hope you were able to see the lunar eclipse last Wednesday. It was quite a show in Central Florida.

I used my Nikon D80 with a 70 – 300 VR zoom on a tripod in the driveway to make these photos.

It was quite cloudy at the beginning, but fortunately turned perfectly clear during totality. This first photo was made early as the earth’s shadow started to move across the moon.

The three photos posted here are all croped versions of larger files. 300mm is not quite enough lens to get full frame magnification. I had thought about trying to make some photos through my telescope, but I don’t have a camera adapter for it and didn’t want to try to hand hold an exposure. I used the spot meter mode in the camera and bracketed +/- one stop. The one stop underexposure was the best choice (as you might guess), since the meter coverage is a bit larger than the moon was in the sensor. I used both ISO 100 and 400. During totality, ISO 400 helped to reduce the exposure time and improved sharpness. I also played with turning the lens Vibration Reduction on and off , but I couldn’t see any difference in the results – which is good. I’ve noticed that the image stabilization in my Canon G9 will actually make a photo worse if left on when the camera is on a tripod.

The next photo was made during totality.

Finally, the last photo was made using a wider angle setting to also capture Saturn (lower left) and Regulus (above), which were especially impressive.

I have posted a few more of my eclipse photos
here.

Sunday morning macro: flowers in the mall parking lot

July 2, 2007Cameras and Photography, INSIDE FLORIDA, TechniqueFlowers, macroEd Rosack

Lynn and I were at the mall yesterday and noticed some new flower beds. I just got a 60mm f2.8D micro Nikkor lens for my D80, so I went back this morning to see how well it works. This is the first true macro (1:1 magnification) lens I’ve ever had. I like it a lot, but it will take a while to get used to.

Some observations:
– Focus is very critical at high magnification ratios, since the depth of field is so small (even at f16 or f22). The auto focus works well, but it’s difficult to get it exactly on what you want. The D80’s ability to select which focus sensor to use helps.

– Camera shake is worse at high magnifications, too. I took most of these handheld, and using a shutter speed of 1/focal length (x1.5 for the sensor size factor) wasn’t fast enough to freeze my motion. Luckily, it was bright enough that I could use a fairly high shutter speed at f16.

Today’s flower photos are here.

Before and After

June 30, 2007Cameras and Photography, INSIDE FLORIDA, Ocala, Techniqueblack and white, landscape, treeEd Rosack

I listen to the Digital Story podcast . The June 2007 photo assignment is “Before and After”. The idea is to submit two images showing how you “developed” the final photo.

I also just bought the book Examples, The Making of 40 Photographs , by Ansel Adams. He writes about how he re-visited his negatives over the years and was able to make better prints with additional effort / technique.

So these two things inspired me to go back to a photo I took in March, reprocess it and submit it to the Digital Story. Here are the steps I went through:

This view looked interesting from the road, and I talked Lynn into stopping (_DSC1423: 3872 x 2592 Pixels)

The first photo is the scene as I saw it from the road. Lynn and I were driving to an auction up in Ocala Florida and this looked like it could make a good image. It was a bit cluttered, and the composition wasn’t good, so …

I took this shot after stepping inside the gate. A little under exposed, no detail in the clouds and the road into the trees goes dark. (_DSC1425: 3872 x 2592 Pixels)

The second photo was taken after I stepped inside the gate. Better composition, I think. This is how it appears with no adjustments after importing it into Lightroom . I had underexposed it a bit so that the clouds would show up well. As a result, the road into the trees was pretty dark (and there still wasn’t enough detail in the clouds). I played around with it in the Develop module, but still couldn’t get the exposure quite right. So …

I exported two images from Lightroom. One at +2 exposure and the other at 0. This is the result after processing in Photmatix. (_DSC1425d-_+: 3872 x 2592 Pixels)

Photo 3 shows the result after I exported two 16 bit TIFF versions of the image from Lightroom and combined them. One with an exposure bias of +2 and a second with it set at 0. Then I used Photomatix to create a High Dynamic Range / tone mapped version. Much better exposure and detail both in the clouds and trees. This was pretty good, but I still wasn’t happy …

I loaded #3 into Photoshop Elements, cloned out the distractions (lights, signs, houses, rags, fire hydrant, wires) and then re-imported it into Lightroom …

I loaded the previous image into Photoshop and cloned out distracting features (powerlines, etc) then imported the result back into Lightroom. This is the final version after converting to B&W. (_DSC1425-_+cloned8bit: 3872 x 2592 Pixels)

Photo 4 shows the final result after using Lightroom’s wonderful B&W conversion tool. You can play around with different color channels to emphasize different things in the picture. It’s like being able to use color filters over your lens after you’ve taken the picture! I think the final result is much better than the original.

Here’s a link to my gallery with all of the images in sequence.

You can see all of the entries in the Digital Story June photo assignment here .

Shuttle launches from Orlando

June 10, 2007Cameras and Photography, INSIDE FLORIDA, Rocket Launch, Techniqueshuttle, spaceEd Rosack

Tendai asked me about camera settings for shooting space shuttle launches. Rather than write them down, I looked through my photos and posted the ones I’ve taken, along with the EXIF data (where available) giving the settings I used.

Space shuttle launch as seen from Orlando – 1/160 sec @ f/8, ISO 100, 300 mm, Cropped 1936 x 1296, Nikon D80

I took a new set of pictures yesterday. I’m really pleased to be able to see the Solid Rocket Booster sequence from my front yard. (We’re 35 – 40 miles from the launch site). I used my new Nikon 70 – 300, F4.5 – 5.6, IS lens and mounted the camera on a tripod on my driveway. I really like the lens.

My gallery of shuttle pictures is here.

Central Florida Photo Ops

What and where they are and how to photograph them.