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Tech Tips

Tech Tips

OP Expert George Lepp tackles your technical photography questions in Tech Tips.

Wednesday, November 1, 2006

Photographers In Harm's Way

How Far To Go For The Ultimate Photograph? • Reciprocity Compared • Digital Black-And-White • Snowy Details

There seems to be no end to the dangerous things photographers will do to get the ultimate photograph. Each of us has to decide how far to push the limits, but collectively, we're all influenced by other photographers' failed attempts. I'm increasingly concerned by the imposition of more rules and restrictions to our access in both public and private locations due to the government's or the private owner's perceived need to protect themselves from liability and to protect ourselves from our own recklessness.

Monday, October 30, 2006

Understanding Neutral Density

I’ve noticed a lot of different types of neutral-density filters. Could you describe them and talk about how to use the various kinds?

Monday, October 23, 2006

Making It Sharp

I have a Tamron 28-300 lens that I’ve been using with great success on my film camera. When I use it on my newer digital camera, there’s a softness to the images. Is the lens not good for my digital camera? Is there another lens as versatile as the 28-300mm that would give me tack-sharp images?

Sunday, October 1, 2006

Handling Condensation From Temperature Changes

Condensation And The Camera • Save, And Save Again • Scanning Formats • Are LCDs Worth Their Color? • Sensor Cleaning • Just Blowin' In The Wind

I recently was photographing in the tropics with air-conditioning inside and hot, humid conditions outside. I had to let the camera and lenses "thaw" for 45 minutes before I was able to shoot because of condensation. All was well after that, but I wondered if this practice was doing any long-term damage to my lenses or camera.

Monday, September 25, 2006

Exposing In RAW

Digital cameras have a linear response to light. Adobe, in its tutorials on Camera Raw, suggests “exposing to the right” in order to maximize the midtones and shadow information recorded by the camera. What's the best practice you suggest, and how does one go about determining the right “exposure” when using Raw capture?

Monday, September 11, 2006

Exposing For Silhouettes

I'm fascinated by strong silhouettes with the sun in the background when it's partially or totally obscured by foreground objects, such as trees. For example, in your picture of the Baobab tree from Africa at sunset, the tree is dark, yet detail is maintained in the tips of the branches, and there's beautiful color in the sunset. What's the secret to maintaining detail, while at the same time obtaining a proper exposure and rich colors? So far I've simply been bracketing like crazy and hoping for the best.

Monday, September 4, 2006

One Size Fits All

You mentioned the Singh-Ray variable neutral-density filter (Vari-ND) in a previous OP column. If I have my information correct, it appears to be made only in a 77mm mount. I don't know if I can find an adapter to mount it on my lenses with smaller filter sizes, but if I can, will it work properly with such an adapter?

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