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.


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!

Tech Talk: Hyperfocal Distance

Greetings, volks. Welcome to Hohenfels Volks, THE place for our place! Today we’re going to learn about hyperfocal distance.

What is hyperfocal distance? It’s the distance you focus your lens for to have a maximum DOF. When you focus at this distance, everything from about half that distance to infinity is in acceptably sharp focus. To accomplish this and to define acceptably sharp focus you need to know your circle of confusion (COC.) COC is the largest size that a point or spot can be without appearing out of focus. For an APS-C size sensor, which most of us have, that number is .019. The smaller your COC, the greater your sharpness. Although, for different sensors and films that number is different. For 6cmx9cm film, it’s generally accepted to be .07, and for 35mm or full frame sensors, it’s about .03.

Things get mathematical here, so you may want your calculator. You can calculate the hyperfocal distance for a given lens and aperture using this method. Take the focal length of your lens and square it to get variable a, next take your aperture or f/stop and multiply it by the COC to get variable b. Divide a by b, and there you have your hyperfocal distance. Here’s how it looks in mathematical terms

H =F²/(f x C)

In the equation above
H = hyperfocal distance
F = focal length
f = f/stop
C = COC

As an example, your lens is 50mm, you wish to focus on something 10 meters away, use f/11, and you’re using an APS-C sensor. 50x50/(11x.019). This gives us 2500/(11x.019) or 2500/.209, and finally approximately 11.9 meters. If you focus at infinity on your lens, your DOF will run from 11.9 meters to infinity. If you focus at 11.9 meters, your DOF will run about 6 meters to infinity. By focusing at your hyperfocal distance, you can maximize your DOF in an image and get that winning shot. By using this calculation on a variety of focal lengths and f/stops, you can see why smaller apertures (bigger f-numbers) give you greater DOF.

There are 2 other ways to figure it out. Both are much easier, if you are using a higher end lens with a scale on it, you set the infinity symbol on your lens to line up on your f/stop at the far scale, then everything from the matching f/stop on the near scale to infinity will be acceptably sharp. That allows for Maximum DOF and zone focusing. The other easier way is to look it online. There are so many sites that you can find on Google just searching for hyperfocal distance, that you’ll never be at a loss. I prefer using DOF Master, as they have some great stuff there and it’s too easy. You just enter your info and away you go!

I hope this gives you some idea of how to use your focus for maximum DOF and how to get that extra bit of oomph to make your image stand out. Next time we’ll be calculating DOF, more math so keep that calculator handy!

Don’t forget to post any of your images you’d like to see here at the Hohenfels Volks Facebook page. Of course, commenting on both Facebook and here is always appreciated, too!

In the Zone- Zone Focusing

Greetings and welcome to Hohenfels Volks, THE place for our place. I hope you’re ready, Hohenfels, to learn about zone focusing. This is something that can make getting some of those passing moments in the can, as it were, quicker and easier.

First off, let’s explain what zone focusing is. Zone focusing is using a combination of focal length, aperture, and distance to allow for enough depth of field to make a usable print. That’s pretty straight forward, right? Well, there is more to it than that, including knowing your equipment.

Zone focus developed as a way for photographers to focus their equipment, as most older cameras had no viewfinder or way to check your focus. Many of the old time greats used zone focusing to maximize the sharpness and detail in their works. Given the nature of early lenses, high f/stops were often required to get good detail and enough DOF to be worth printing. Remember, sheets of film, and rolls, were costly to purchase, develop, and print, so lots of effort went into taking each shot. Zone focusing grew from the concept and practice of hyperfocal distance, which you use to give you the maximum DOF for each lens focal length. We’ll have more on that in another post.

The technique works best with lenses that have markings on them. A distance scale for focusing opposite an aperture scale with DOF markings as shown in the photo below works best. It’s quicker and easier. Unfortunately, most lenses today are auto-focus, and kit lenses generally don’t have such marking. Higher end lenses do have them, as do pro and manual lenses as a rule.


ISO 200, f/4.5, 1/30, 32mm
Notice the f/stops on the front of the ring. They go out from the diamond marking focal distance, to give you the range, or zone, of acceptable focus.

Referring to the image above, you can see that there is a diamond. That is the distance marker. On the focus ring, there are markers that aren’t shown, that tell you your focal distance. Line up the desired distance, then using the f/stops that radiate out from the diamond, identically on either side, determine your needed aperture and distance. The distance covered will line up with the marks for the desired aperture. It’s that simple, anything in that range will be in sharp enough focus for decent size prints, including 8x10 and 11x14 if your camera has the resolution.

If your lens has a focusing distance scale, much like Canon’s 28-135mm, you can figure out your DOF with a little legwork online. The key when using zone focus, is to turn off your auto-focus. The second factor is to shoot either Aperture Priority or Manual modes only! Any other mode nullifies your efforts!

Know your location, and what’s happening there, and you can figure the ranges you will need. Let’s say for our purposes you’re shooting in a decently lit area at ISO 400 and you need to cover 3 meters and 6 meters, with room to spare. You get you’re framing, that will give you your focal length. You know it’s decently lit and you can get by with f/5.6-f/8. Going with a 55mm focal length, as most kit lenses like to go from 18-55mm, you should be focused at 4 meters for f/5.6 and 3.5 meters for f/8, although 4 meters is adequate, and has the advantage of allowing you to switch over to f/5.6 without losing too much DOF. If your lens doesn’t have a focal distance scale, measure off 4 meters, focus your lens, and mark it. An easy tip for marking your focus, is take 2 fat rubber bands and wrap one around the zoom ring of your lens at the focal length you wish to use, then wrap the other around the focus ring. Mark the one on the zoom ring at the top, focus your camera, then make a mark that lines up with the first mark you made. As time progresses and your lens drifts over the course of events, you always have your focus marked and can return to it in a snap. Then set your aperture and you’re cooking with gas!

A great online DOF calculator that just requires your focal length, camera model, and scale used (feet or meters) is DOF Master's DOF table. They also have some great information on hyperfocal distance and some nifty little software to play with!

If your shooting with a flash, your f/stop will be dictated by the flash when you use manual flash. TTL and E-TTL are great for using flash, but to use it right, you need a sync cable that’s designed for your camera maker or line to get it off camera. You can get a good one that’s about a meter reasonably priced. Add in a Flashbender or Sto-fen to diffuse the light some, and you’re off to the races. This allows you to hand hold your flash off camera and get some directional TTL or E-TTL light in your images that just adds to the quality.

Zone focusing is great for street photography, event photography, candids, and may other things. Try it out in your works and see how it can help you! You can also use it for this week's theme, as it will allow you to appear less obtrusive when shooting work getting done!

Enjoy the rest of your day, and remember to cast your vote for next week’s theme. Get yours in to have a say! Don’t forget to get your pics posted at the Hohenfels Volks Facebook page. Of course, commenting on both Facebook and here is always appreciated, too!

The One That Got Away

Greetings, Hohenfels, welcome to Hohenfels Volks, THE place for our place. I hope everyone is having a great weekend.

Today’s just going to be a thought for you. Something to mull over and think about when you’re going out to shoot. It’s called attention to detail. It’s something you need to practice, even when you’re visualizing your shot!

Yesterday was a long day! After work, I went over to the community tree lighting with the daughter, for her it was to see Santa, for me it was to take pics! Take pics I did, a whole lot! After getting a few shots, including some that couldn’t be redone, I discovered my IS was turned off on the lens I was using. That meant the pics I had shot at 1/30 were going to be slightly soft in the focus, and that also meant I was feeling a little down! After writing about IS in a previous post about lenses, I should have known better. D’OH!

Anyway, after kicking myself, and turning the IS back on, I went on to get some decent shots. After seeing Santa and some of our wonderful friends, we went to a little party for a friend’s birthday, and I shot a handful of keepers. Another thing I had forgotten was to bring the tripods and lighting mods, which meant more effort to get the light right, but the shots were worth it.

The point is, check your equipment before turning it on. Check it before you even begin thinking about using it. Check it as part of your visualizing; by seeing yourself take the actions to make your vision reality, you’re rehearsing the steps you need to succeed. It will make your pictures better and save you the shame of losing the one that didn’t get away until you snipped the line!

O.K., enough of that mourning the lost shots, remember to get your votes in for next week’s theme. We have a 4-way tie right now, and that means it’s my choice if we end the week that way! This week our theme is “Morning Moments.” I hope to see everyone participating! Get shooting and start posting at the Hohenfels Volks Facebook page. Of course, commenting here is always welcome, too!

Tools of the Trade- More on Lenses

Greetings, Hohenfels, welcome to Hohenfels Volks, THE place for our place. Here’s hoping today sees you starting on the downhill run of a great week!

Today it’s time to talk a little about lens attributes and traits.

We’ve already talked a little about lenses, so today we’re going to concentrate on some of the quality issues and features of your lenses. It’s a little long, for which I apologize.

One of the first things most folks need to know is that your old film lenses will work on digital cameras. They may have a crop factor, for instance 1.6X for APS-C, but if they can mount on your camera, you can use them. On the other hand, your newer digital lenses are unusable on full frame or film cameras. When you put a film lens on an APS-C sensor, the crop factor comes from the distance from the back of the lens to the sensor. The film lenses cover a larger area than the sensor; this in turn causes an apparent increase in focal length and the crop. Canon’s recent systems, the EOS cameras, use EF lenses, which have a 1.6X crop on your APS-C sensor. Their digital line of lenses for the EOS system is the EF-S line. They require no crop factor and apparent focal length is actual focal length. The reason the digital series of lenses don’t work on full frame or film cameras is due to their smaller projection of the image onto a smaller sensor. They won’t fill the frame or film, and most likely won’t even focus properly even if they could be mounted.

Another concern about your lens on zoom lenses is often the aperture. Less expensive lenses read something like 28-135 f/3.5-5.6. This is because the aperture size doesn’t change during zooming, that is the largest it can go. The area of the aperture remains constant, requiring a change in f-number. If you remember, your f-number is a ratio of focal length and aperture. It represents the focal length divided by that number, that’s why it’s written f/2, f/5.6 etc. The longer a lens is, the less light reaches the sensor. That’s why the f/number changes throughout the range of zooms. If your area doesn’t change, your f-number must. The reason for this is the cost and weight added to vary the aperture size throughout the zoom range. That doesn’t mean a constant aperture means a cheap lens, it doesn’t mean less quality, it just means less light as you zoom in.

A great feature of lenses over the past few years is the addition of IS. The affordability of technology has made it possible to use feature that used to be unavailable to the hobbyist. IS allows slower shutter speeds when enabled. Using it hand held, you can get down to about 3 stops lower that the handheld limits. The systems work by compensating for motion with motion in the opposite direction. When hand holding your shot, using proper shooting styles, with arms tucked in etc, will enable the IS to really slug it out with vibration. The most important thing to remember is turning it on for handheld, and ALWAYS turn it off for tripod shots. When on a tripod, the IS searches for motion in the lens and can cause vibration rather than reducing it. The big drawback to IS is that it uses your camera’s battery for power.

The last thing I’ll bring up for now is a quality issue. The problem is chromatic aberration or CA. This is distortion caused by different colors, or wavelengths, of light focusing at differing areas on your sensor. There are several types and names, but we’re not going into it that deep here. It often causes the purple fringing that you see along borders with bright highlights and dark shadows together. Using a smaller aperture can help mitigate this, as can a longer lens. Low dispersion glass and good coatings can combat this effectively. There seems to be many complexities involved in CA, including the types and calculations. The best practice when purchasing a lens, if possible, is to take a test shot using that lens of a high contrast area, and zoom in looking for fringing. CA can also cause blurriness in Black and White photography, so keep that in mind. You can see examples on Google to get more information and some idea of what to look for. According to the reviews I’ve read, Canon makes the most advanced software correction to mitigate CA and other distortions available. Because Canon’s EF lens system is actually all electronic, and records the information on individual lens models, Digital Photo Pro can compensate for it. Yet another advantage of shooting RAW!

Whenever you look to purchase a lens, make sure you read a variety of reviews, and look at loads of test photos taken with that lens, it could save you some headaches! If you have a lens that you favor and would like to write it up here, let me know, and I’ll get it posted for you!

Now on to other things, remember to get your votes in for next week’s theme. This week our theme is “Morning Moments.” Dazzle me with your work! Get shooting and start posting at the Hohenfels Volks Facebook page. Of course, commenting here is always welcome, too!

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!

FOCAL LENGTH

Welcome to another post!

Our topic this time is FOCAL LENGTH, and covers more than just lens sizes.

Let’s start out with the basics; FOCAL LENGTH refers to the length of your lens, usually in millimeters. A 300mm lens is 300 millimeters, but crop factor can change the apparent FOCAL LENGTH of the lens. Crop Factor refers to sensor size on a digital camera. Most of us use cameras with an APS-C sensor, which provides a 1.6x crop factor, or 1.6 times the magnification of the lens’s FOCAL LENGTH. Unless a lens is made for the specific crop factor, for instance Canon’s EF-S lenses, crop factor must be counted to provide the correct focal length. Therefore, a 300mm lens at 1.6x crop factor has an apparent FOCAL LENGTH of 480mm. Since most of us now use the digital lenses that either came with our camera, or we purchased later, I’m not going to make too much of crop factor, that’s for another post.

A large number of folks believe that the perceived change between two FOCAL LENGTHS is caused entirely by magnification. This is actually not entirely true. When you zoom in closer, your lens covers a smaller area of the scene. It doesn’t really magnify it, just shows less in the same amount of space, although there is some magnification from the optics. If you look through a toilet paper tube and take note of what you see, then look through a paper towel tube of about the same diameter, you’ll notice this effect.

Another effect of FOCAL LENGTH, is longer FOCAL LENGTHS, compress the distance between objects in your scene, making them appear closer together. This is great for a portrait with a shallow DOF, as it can blur out and compress the background for a nice effect. It’s something to pay attention to, as the effect can make a great picture look somewhat flat and plain.

For more the rest of this article about FOCAL LENGTH, check out our Intro to Photography page, which contains our full intro series posts so far. And for a great article about the effects of FOCAL LENGTH, check out Photo Tuts+. You can also get into the maths of it at Wikipedia!

I hope this article will be useful on your photographic journey. The knowledge really helped me! Enjoy the weekend folks, and keep your eyes open for more articles, tips, and Hohenfels Volks photo goodness!