The Photocrati Blog

Pentax K-7 Digital SLR Camera: Field Test Report

Peter Burian tests this rugged, well-sealed 14.5MP camera with pro caliber versatility and extras such as Movie mode and in-camera HDR

The flagship of the Pentax DLSR series, the K-7 is an unusually rugged semi-professional 14.5 MP camera that’s built like a tank: with a splash-proof magnesium alloy body over a stainless steel chassis. While the 14.5 megapixel K20D is less pricey, the K-7 is even more desirable. This newer model retains all of the K20D’s best features but provides significant benefits: faster (5.2 fps) drive speed, larger 3″ LCD with 920,000 dot resolution, a viewfinder with 100% coverage, plus upgrades for the sensor, processor, autofocus system, built-in image stabilizer and evaluative metering (now with 77 zones). More importantly, the K-7 offers some entirely new functions, including HD Movie mode. (more…)

Q and A: What kind of lighting should I use for macro nature photography?

Question

I have started macro nature photography using a new Nikon 85 mm f/3.5G VR Macro lens on my Nikon D90 camera. What is best in terms of lighting? Should I use a shoe-mounted flash unit with a downward tilt, or a ring flash, or a bracket with two arms, each holding a separate flash unit? H. H.

Answer

In my experience, on-camera flash is not suitable for extreme close-up photography. The flash may not be able to light the bottom part of the subject in extreme close-focus image making. That’s because it does not allow for an adequate downward tilt and the lens barrel may block some of the light. If you do want to use a conventional flash unit, move it off-camera using a TTL extension cable or Wireless Off Camera Flash (if your camera supports the latter.) For softer lighting add a large diffuser accessory such as the Lumiquest Softbox III. (See this item at B&H ; See this item at Amazon Lumiquest The Softbox III – Lumiquest LQ-119)

The latest macro ring lights – such as the Metz 15 MS-1 that I recently tested – are very versatile and easy to use. They typically consist of a circular mechanism that’s mounted on the front of a macro lens with an adapter ring. The “ring” – with two individual flash tubes – can be rotated so you can place the two light sources at the desired position. The Metz kit (and some others) also includes a diffuser accessory that’s useful in extremely close focus work. (See the Metz unit at B&H; see this item at Amazon Metz MZ 15110 Digital Macro Slave (Black)) (more…)

Balancing flash with ambient light outdoors

Trying to balance your flash with bright sunlight for an outdoor portrait scares the pants off people. It’s one of those things that seems so hard to do, especially if you are using off-camera flash without TTL. In that case, it’s all math and numbers and my head starts to hurt just thinking about it. Fortunately, it’s not really that difficult to do once you learn a few tricks.

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The Tuesday Composition: Composing Images with Water

Surf, Garrapata Beach. Still images can't capture motion in water, but they can communicate the idea.

If you like this article, you can now get the book! Joe has expanded the “Tuesday Composition” series into an inspiring new ebook on composition, especially for nature photography. Check it out: The Tuesday Composition.

Like mist and fog, water is a subject that deserves it’s own consideration compositionally. With the exception of very still lakes and ponds, one of the things that makes water “look like water” to us is the way that it moves. We can’t present this movement in a still image to a viewer directly. Instead, we have to translate it into a still image by making an exposure; and we use a variety of controls such as shutter speed and composition to help communicate a sense of that motion.

When we want to capture a sense of movement in water there are several things to keep in mind. Shutter speed has a significant effect-a waterfall, cascade or even surf against a coastline will have a very soft, gentle feel if we use a long exposure. Faster exposures will stop individual droplets in air, creating a greater sense of energy. Shutter speed isn’t the only thing to keep an eye on, though. The way we compose the path of water through a scene can also affect how viewers experience water moving through a scene. Where possible, try and make it easy for the viewer’s eye to trace along the lines of the water’s path. Your images will (all other things being equal) be more effective if the visual flow of the water isn’t interrupted by things that block the view of the water. Diagonals and S-curves can also create an additional sense of motion. (more…)

Q and A: What’s the difference between the new Sigma 10-20 mm f/3.5 lens and the original?

Question

Is there really a difference in performance and innovation between the new Sigma 10-20 mm f/3.5 and the original 10-20mm f/4 lens. The latter is much more affordable. Is the difference of several hundred dollars justified? R. P.

Answer

Yes, the newer model is more expensive (though only by $170), but do note that the maximum aperture is a constant f/3.5 at all focal lengths. The other Sigma 10-20mm zoom does not have a constant maximum aperture; it’s an f/4-5.6 lens. In other words, the widest aperture is quite similar at very short focal lengths, but with the older lens, it diminishes to a smaller f/5.6 as you zoom toward the 20mm end.

That is the primary benefit of the 10-20mm f/3.5 lens and it would be important for photographers who often shoot in low light, without flash or a tripod. Granted, even f/3.5 is not an extremely wide aperture and we often shoot at f/11 to f/16 with an ultra wide angle lens (for extensive depth of field). On the other hand, the wider aperture at longer zoom settings can make the difference between the need to use ISO 800 (at f/3.5) versus ISO 1600 (at f/5.6) in a very dark location. And as you know, every camera produces superior image quality at a lower sensitivity setting.

If you don’t often shoot in very low light, the good news is that the original Sigma 10-20mm f/4-5.6 EX DC HSM lens is excellent; you should be perfectly happy with that model. It’s also smaller and 8 ounces lighter (because of the smaller maximum apertures) and accepts smaller/more affordable 77mm vs. 82mm filters.

Granted the more expensive f/3.5 lens has some other benefits. (more…)

Pentax K-x Digital SLR Review: Field Test Report

Jack Neubart gets a taste of a sweet compact 12.4 MP CMOS APS-C DSLR with a suite of features.

Pentax K-x body, white version. Photo courtesy of Pentax.

I approach each new camera with a degree of skepticism. Unlike many out there, I’m not as easily swayed by all the media hype and promotional gobbledygook. I’m from Brooklyn and we need to see that something actually works. So when the Pentax K-x arrived, I looked at it, pleased that they sent me the “white” version, only because it reminded me of the Imperial Storm Troopers from Star Wars (would have been a great fit). I unpacked everything, mated the lens to the K-x body, installed the lithium batteries that came in the box, then added my own SDHC card-none included (also takes standard SD-but why hamper the machine out of the gate!). And I started to play with it.

Hmm, not bad, I thought. But let’s see how it performs in the real world. So, intrepid explorer that I am, I ventured outside. It may not be a tropical rain forest, but it is an urban jungle out there rife with photographic opportunities. (more…)

Panasonic Lumix DMC-GH1 Review: Field Test Report

With its HD movie mode, articulating LCD and ultra high resolution viewfinder, the GH1 may be the most desirable Micro Four-Thirds camera

The first manufacturer to develop a Micro Four Thirds camera, Panasonic now markets three distinct models. These include the original DMC-G1, the pocket-size DMC-GF1, and the DMC-GH1 which benefits from the best features of the other models. These 12 megapixel cameras are all smaller/slimmer than DSLRs because they’re not equipped with a reflex mirror or a pentaprism. They also accept smaller lenses but employ a much larger sensor than most digicams with built-in lenses. That allows for much larger pixels for “cleaner” images – with a less “grainy” effect – at ISO 400 and above. (more…)

Printed Portfolios

Even in this world of online meetings, websites and blogs we need a printed portfolio book to show prospects. I’m in the process of re-doing my books so I’ve been researching this pretty heavily.

The format and styling of your book will depend greatly on who you’re marketing to as well as your own personal style. A wedding book is not going to be anything like a commercial book which won’t necessarily look like a pj book. In general here are a few nuggets of wisdom I’ve been able to scrounge in my research. (more…)

Wedding Photography and Bounce Flash

I’ve been trying to write about bounce flash at weddings for about an hour now. The problem with explaining bounce flash is that it seems simple at first (just point the flash over your shoulder!) but then there’s a snag … a situation where that doesn’t quite work. So, you talk about the snag, which leads you down another path (diffusers and bounce cards!) … which veers off into some other tangent (shadows and background!) and the next thing you know you’re typing the words “raccoon” and “inverse square law” in the same sentence and you just have to stop.

So, here’s what I’m going to do: I’m going to post some pictures from a recent wedding and talk about the lighting in each one. Hopefully I will be able to stay on topic. (By the way, I am a wedding photographer in Tampa, FL and no raccoons were harmed in the writing of this article.)

This particular wedding reception was in a small room with low ceilings that were white (mana from heaven for a bounce flash photographer). I was able to shoot with my flash pointed back over my left shoulder most of the night. I think a lot of people tend to believe that you either bounce off a wall or you bounce off the ceiling in front of you. It’s important to realize that you can bounce off the ceiling behind you as well (especially if it’s low). You will typically lose some light, since most of it will bounce to the back of the room but you’ll still get some back from the ceiling, tablecloths, walls, etc. I had my flash dialed up to +1 most of the night. Could I have taken this shot with a diffuser or direct flash? Sure, but I would have lost contrast in the subject. The reason the dancing man stands out is because the light falls off across his body (notice the shadow on his face).

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The Tuesday Composition: Communicating Immensity

Cerro Torre, Los Glaciares National Park, Argentina

If you like this article, you can now get the book! Joe has expanded the “Tuesday Composition” series into an inspiring new ebook on composition, especially for nature photography. Check it out: The Tuesday Composition.

One of the most common challenges in landscape photography communicating the scale of large objects. Photographs seem to resist conveying the sense of scale we often feel in a landscape. When we take the photograph, we have the opportunity to move around in the landscape, to hike a half-mile and notice that our view of the mountain hasn’t changed much. Our brains unconsciously integrate that information into our perceptions of the world around us. Viewers of our still photographs see things much differently.

Small prints and web images are particularly challenging. Our minds seem to resist perceiving a mountain that stretches a mile into the air within a photograph that fits inside a lunch box. Even large prints sometimes seem to lack any real ability to communicate the size of the landscape they portray. As a result, rather than relying on making large prints, we have to understand how our brains perceive scale in still images, and take advantage of the cues our brains use in that process. (more…)