Showing posts with label filters. Show all posts
Showing posts with label filters. Show all posts

Tuesday, September 17, 2013

Autumn Care

Greetings and welcome to Hohenfels Volks, THE place for our place! Here in Hohenfels, the Sun made a couple cameo appearances but wasn’t able to stir up any kind of significant warmth. The rain put a damper on the spirits, as did the fact that it’s a workday!

With autumn’s brutally chilled arrival, we’re nearing the time to shoot some real color! There’s always some excitement about the colors, shapes, textures, and patterns that accompany autumnal photography. As I mentioned in yesterday’s quote, now’s a great time to think about negative space and the use of color to create tension, balance, and harmony in your photos, and bring about the connection you’d like to make.

Hohenfels Volks: Black Velvet, flowers in Bayreuth
ISO 800, f/11, 1/60
These flowers were shot at the Hermitage in Bayreuth. A Wratten #8, yellow, filter was used. By using the filter, the green was brought up slightly, and the white flowers separated from both the red flowers and green leaves. By allowing a rich grey-black to fall on the leaves and red flowers, a velvety feeling of negative space results. While fragmented and carrying visual detail, it is by no means the subject, and yet becomes a subject of its own.

Along with the march of color into the dreariness ahead, comes other factors that photographers should take note of. First, is the rapid decrease in temperatures, the drop in temperature can take the starch out of an exciting day. Another factor is the rain, always something to be ready for in our Hohenfels area. Getting your camera wet can lead to issues that no one wants!

One of the biggies, I’ve found, is the increase in static. For the most part, photographers don’t have to worry about while photographing with digital cameras. It’s when the time comes to change cards or clean your sensor, or even change your lens that it becomes an issue. A typical “zap” can have as much as 30,000 volts jumping from one surface to another. Enough to ruin your day if it arcs over onto your sensor. Since most folks don’t clean their sensors beyond a squirt from a bulb blower, it’s pretty reasonable to say that the standard precautions are sufficient.

With film, though, static can be a big problem. Advancing film, rewinding film, activating the shutter, removing a dark slide, all these things can cause an arc that will ruin your shot. The can also damage your shutter curtains if your camera uses cloth. In the driest and coldest weather, it could damage your sensor, but that’s unlikely.

The biggest threat to digital cameras during this time of year is the condensation from thermal transitions. That’s a fancy way of saying going inside from outside. I’ve found one of the best ways to protect anything is a Ziploc bag and 30 minutes. Don’t plug your camera in, put your card in your reader, or power on your camera when you first come in. The temperature change can cause moisture, which we all know, doesn’t sit well with electronics! Think about glasses fogging over when you come in from the cold!

Another awesome tip- when you get in from the cold, make a big cup of hot cocoa, with extra chocolate. It’ll warm you up, and give time for your gear to reach a suitable temperature! It helps if you have someone to share it with. A nice cup of cocoa with my little princess makes for some fun talk time, and 30 minutes is gone before you know it!

Now’s the time get scouting and planning your autumn shots. Figure out where and when, the rest will follow. Then, make your shot and share it with us on our Hohenfels Volks Facebook page. We’d love to see your work.

Is there anything you’d like to see here? Do you have a question? Share your thoughts here or at the Hohenfels Volks Facebook page. Of course, commenting on both Facebook and here is always appreciated, too! Don't forget, Hohenfels Volks is on Google+, too!

Wednesday, October 26, 2011

Tools of the Trade- Filters

Hello, Volks! Welcome to Hohenfels and to our newest post. In today’s Tools of the Trade, we’re going to talk about filters.

Filters are glass that goes on the end of your lens. There are many types of filters, some for artistic purposes, some are for technical purposes, and some are to protect your lens.

The 2 basic set-ups are the square filter, which uses a holder that fits onto your lens, and the screw-in.

Most people use the screw-in filter. When selecting a screw-in filter, you must ensure that the filter’s diameter matches that of your lens. A 58mm lens requires a 58mm filter. The threads are universal, so moving from lens to another of the same diameter is not a problem. They come in many types, and are usually more widely available.

Square filters use an adapter ring that screws into your lens just like a screw-in filter. The ring remains in place when you switch your filters to another lens. Having one adapter for each lens allows you to move your filters easily from lens to lens, and back. Cokin makes the most common square filters, and they have several types and varieties. The basic and most common ones for our needs are the P series. With square filters, you have the extra advantage of staking several together without vignetting on your image.

The first filter you either did, or should, purchase is a UV. This is a cheap filter to place over the end of your lens. It limits UV radiation, but the main reason for having it is that it will protect the glass in your lens. Breaking a filter costs just a small amount to replace, whereas breaking a lens costs considerably more.

The next in the line of types is the circular polarizer, or CP. You can replace your UV with a CP and prevent vignetting caused by stacking your filters. It increases contrast and darkens blue skies. It can do a lot more than that, including improving the color contrasts. The main feature beyond that is that when properly turned, it can remove reflections from glass, water, plastic, and most sources, except metal and mirrors. This effect is strongest when your light is approximately 90 degrees to your left or right with the lens facing forward. You use this lens by turning the filter’s twist ring until you obtain the desired results. Look for one that has good coating and no impact on your color balance.

Next up is the neutral density filter. These little gems can help reduce the light to your sensor, allowing for slower shutter speeds and nice effects in fog, or when shooting running water. They are great landscape tools, and properly placed in a shot can darken the sky, while allowing the landscape portion to be shot at a decent shutter speed. They come in numbers like 1, 2, 3, 4, etc. When numbered this way, the numbers refer to stops of light. 1 being a 1-stop reduction in light, and so on. The other system used to rate them in their density, in .3 increments. Each .3 increments equates to one stop. ND filters do not change the colors, as they pass light of all colors equally. When used on extremely bright objects, they increase contrast and improve image detail. There is also a graduated ND, which is an ND filter with reduction only about halfway down the length of the filter. This allows for darkening a sky while allowing the remaining portion of the image to remain unaffected.

Black and white photographers use colored filters to change to light hitting the film or sensor. Red filters pass red light and darken green and blue. Green filters pass green light and darken red. There are a whole series of color filters for both black and white and color photography. Most are labeled by their Wratten numbers, for instance 81A is a light warming filter. The Wratten system is available online and filters using this designation can be purchased online.

There are filters to soften the contrast, and other special effects, including adding starbursts, grids, and to increase the magnification of a lens. By knowing something about filters, you can get the right kind, and the best one for you and your photography.

There are shops in the local area, including Amberg and Regensburg that carry the different types of filters, and you can any of them online. Try to get a decent one, as low-end filters can add colorcasts and vignetting that will leave you wishing you hadn’t used a filter.

Enjoy the rest of your week! Surrounding the Hohenfels area are towns and sites worth shooting and adding a filter can make your art that much better.

Remember to get out and shoot with your filter and share your pics and questions by posting at the Hohenfels Volks Facebook page, and or by commenting here!

Tuesday, October 11, 2011

Tools of the Trade- Lenses

Welcome to another Hohenfels Volks photography article. Today in Tools of the Trade, we’re going to discuss lenses. The lenses are like the eyes of the camera. Without them, your light is useless!

You may hear someone talking about their “glass.” Photographers like to refer to them that way, it’s a kind of insider speak. A fine example is the statement that for shooting pro-sports, you need “fast glass.”

Here are the basic parts of a lens;

The Focusing Ring - this allows you to focus your lens on your desired center of interest.
The Zoom Ring - this allows for changing your focal length on zoom lenses.
Front Optical Lens- the front-most element in a lens. This is where the light enters your lens for image recording.
Rear Element- the last element before the curtain or sensor. This is special because of back focus.
Lens Mount- this is where your lens connects to your camera body. It usually has electrical contacts for the camera to communicate with the lens.
Auto-focus On/Off selector- turns off the lenses auto-focus motor.
IS On/Off selector- if your lens is equipped with IS, this turns it on or off.
Diaphragm Blades- these are the blades used to adjust your aperture. they are sensitive and easily damaged. The more blades, the more circular your aperture.

Never try to mount a lens with a different mounting system than yours to your camera. Canon’s lenses cannot be used on a Nikon without a special adaptor, and vice versa. When mounting your lens, remember to align the mounting marks, and firmly seat the lens on the body. Once your lens is seated, you’re off to the races!

When shooting on a tripod or at higher speeds, turn your IS off. This saves battery life and prevents blurring caused by the IS looking for motion that doesn’t exist. A sufficiently high speed is no slower than 1 over your focal length in seconds. For a 300mm lens, you can safely handhold at no slower than 1/300 second.

Lens Care

When handling your lenses, never touch the glass!
Always keep the camera side of the lens facing down whenever the cover is removed to prevent dust settling on it.
When your lens is mounted, the best option is either a cheap UV filer or Circular polarizer. This will protect the glass of your lens from being scratched or broken.
Clean your lenses with either a cleaning kit or soft lint free microfiber cloth.
Always use a blower bulb to remove the dirt before wiping. Then wipe in a circular motion from inside to outside.
If it still needs cleaning, place a couple drops of lens cleaning solvent on the cloth and wipe again. Never put liquid on the lens.
Store your lenses in a clean dry place. Try to ensure it is free from dust, dirt, and moisture.
The case most lenses come with is a good place to store them.
Never subject your lenses to hard banging or jostling. This can damage the diaphragm blades used to adjust your aperture.
Take care of your lenses and they will provide a lifetime of great images and memories!

Not all lenses are created equal, some are better than others, but taking the time to learn about yours will make it more valuable and your images that much better!

Well, after that long-winded discussion, I’m sure your dying to get out and take some pics. Choose your lens and shoot away! There’s enough around Hohenfels to give all your lenses a workout! Make sure you post the pics to the Hohenfels Volks Facebook page and share the joy with all of us!

Remember; leave your comments and questions here and on our Facebook pages, also.

I'm looking forward to hearing from you!

Thanks to all of you, have a great day!