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Showing posts with label polarizer. Show all posts
Showing posts with label polarizer. Show all posts

Wednesday, 8 February 2012

Shooting In The Desert - My First Time

Posted on 15:35 by Unknown

 

A couple of years ago I noticed that one my friends started posting lots of "Dunes" pictures, they usually consisted of a car or two, a few guys and lots of sand. I wondered what they did in these trips and where did they go to, so he offered me to join him in one of the trips and I jumped at the opportunity. I wanted to enjoy the adventure and take better-than-camera-phone pictures, hit the jump for the full pictorial.

 

 

This is my friend's car, a 1997 Toyota Land Cruiser, fully prepped and modified for such treks, in this picture we have just left the asphalt and were reducing the tire pressure to get a larger footprint and avoid getting stuck in the soft sand.

Camera wise, I chose my 15-85mm lens and skipped everything else for two reasons, knowing that it will be windy, I was not keen to change lenses when there's a chance I might get dust on the sensor (never cleaned it, and hope to never need to), the other reason being the flexibility of the zoom, I knew I will be mostly shooting landscapes with a large DoF, and this lens provided a 24mm equivalent field of view, so the small aperture didn't put me off, I spent most of the time between f/8 and f11, and when I needed to zoom or get a close-up, it also served me well.

 

 

Of course with such environments a CPL is a very useful accessory, it really helped enrich the blue hues of the sky and darken the sand's color. The other accessories I took with me were a Manfrotto tripod + a remote shutter release /intervalometer for the night shots (review coming later), a couple of speedlights, the Lumiquest SBIII and a lens cleaning kit.

 

 

 

 

 

We spent the night behind the rocks you see in the picture above, it provided a good shelter from the wind. Once we settled in and setup our tents, it was almost sunset time, I took a few pictures of the beautiful violet sky hues like the picture at the top of the post, and the one below.

 

 

Once it got dark, I setup my tripod and started taking photos, the most difficult thing was focusing on far away objects in almost complete darkness. During the below shots, I learned that I don't have the patience for long exposures, I hope I can rectify this in the future.

 

 

 

 

In the photo above I wanted to light the rock to give it a more interesting look, so I setup the camera on the tripod, adjusted the exposure, and asked my friend to release the shutter when I signalled him.

The rock was quite far from the camera, so I left one speedlite with my friend and I took the other, and we agreed that I will signal him with a flash and he will release the shutter, then I will start using my speedlite's test button to light the rock, I had no idea how much light is enough, so I set my flash to full power and kept firing it during the exposure.

As you can see, I didn't really succeed (can you see me to the right of the rock?), and due to the failure of our signaling system and my lack of patience, the above shot was the only one I got. I slept very early that day and resumed shooting the next morning with the sunrise.

 

 

 

 

 

I enjoyed that trip very much, and would not hesitate to repeat it anytime. I was also happy with the IS performance of my lens, I took loads of nice shots from inside the car while we were jumping around.

 

 

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Posted in 15-85mm, cpl, desert, polarizer, tripod | No comments

Tuesday, 3 January 2012

Circular Polarizer: Miracle Maker

Posted on 14:18 by Unknown

Circular polarizers are a very interesting piece of equipment and usually overlooked by beginners who only buy UV filters as per the sales person's advice. I like to say that the polarizers are magic makers, the very first time you use one, you will be astonished with what it can do. Hit the jump to learn more.

 

The polarizer filter idea is the same as your sun glasses, I don't want to get into scientific details about light waves, polarization and stuff, but if you're interested, you'll find a good explanation here. Suffice to say, a polarizing filter cancels a part of the light reflected from any object, be it the sky, a car's windshield or the water's surface.

 

So how can this be of benefit for you? I'll give you a small exercise, go outside in the morning and try shooting your car from outside and see the car's interior through the glass, mostly (depending on your angle) you'll find that the glass reflects the sky and the surroundings. Check this example:



Now here's the same picture with the circular polarizer:



Just like magic, but the sharp reader will notice that the side windows have become reflective in the second picture, you can't have everything when there are different angles from which the light is reflected. But if I had to have them all clear, I would use a tripod, take two shots and use photoshop to merge the parts I needed.


Polarizers are generally useful in eliminating reflections like the example above, more examples would be shooting wrist watches, shooting fish through tanks, shooting through the surface of the water, etc...


They can also be used to get better contrasting skies and miraculously vibrant images, this works better when you're shooting 90 degrees to the sun (i.e. the sun is either to your left or your right), and since the polarizing effect depends on the angle of reflection, you'll usually find that the sky color doesn't become even across the picture. The picture below is a standard picture shot without the polarizer.



And here's the same picture with the polarizing filter:



Unbelievable! So how do one use a polarizer? See the picture at the top of the post? This is how it looks like, you thread it to your lens like any other filter and you have a part at the front that rotates, and you keep rotating the filter while looking through the viewfinder until you get the look you want. It will also be very good if your lens' front element doesn't rotate with focusing since this will change the filter's rotation each time the camera changes focus.


They always tell you to buy the best brands in filters since they have coatings that minimizes reflections and will not degrade the picture in terms of sharpness, however, polarizers are very expensive especially if you have a large diameter thread, and different lenses with different thread sizes. I myself went for a not-so-expensive 72mm (larget lens thread size I own) Chinese brand since I don't use it a lot, and I didn't find it cost me pixel sharpness at all, and for my remaining lenses I bought some cheap Bower step-down adapters like the one below.


 

 

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