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Tech Tips

Tech Tips

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

Monday, May 12, 2008

Accessible Photography

I love picture-taking in our national parks. My wife is in a wheelchair. Do you know of tours for the handicapped, or whom I could contact about helping us when we go to the national parks?

Monday, May 5, 2008

Low-Light Macro

I’m a mycologist who wants to photograph mushrooms in the forest under low-light conditions. How would you get the camera and flash low enough to capture detail under the mushroom cap of ground-sprouting mushrooms (some are only an inch or two tall)? I currently use a Canon EOS 40D with 50mm, 100mm and 200mm Nikkor-Micro lenses with an EOS adapter, an Arca-Swiss ballhead and an older Gitzo Reporter tripod with a removable center column. I also have an EZ550 flash with an off-camera cord. Can you suggest equipment/techniques to facilitate this work?

Monday, April 28, 2008

Printing Panoramas

I have an Epson Stylus Photo R2400 printer—great printer, but I can’t coax it into printing a panorama of any significant size with the 13-inch x 32.8-foot roll of Epson Luster paper. The print preview looks fine, but it only prints a short segment of the image at the desired width.

Monday, April 21, 2008

What’s In A Name?

When you sign your prints, do you sign the photo itself or on the mat?

Monday, April 14, 2008

Best Digital B&W

When using a digital camera, is it better to get black-and-white photos by capturing in color, then processing as black-and-white, or by capturing the shot with the black-and-white setting in the camera?

Tuesday, April 1, 2008

Slicing Up Depth Of Field

Formulas And Focus • Size, Weight And Will it Float? • From JPEG To RAW • Charging Overseas Without A Charger • Bifocal Focus

Formulas And Focus
I shoot a lot of wildflowers and have tinkered a bit with Helicon Focus Software. The main objective is, of course, the soft background with a sharp subject. Do you have any formulas for the number of slices at various magnifications? I use a Really Right Stuff focusing rail and a Canon 90mm tilt/shift with and without extension tubes.

Tuesday, March 11, 2008

Keeping Sensitive To IR's Needs

Tripping With Infrared Film • Running Out Of Walls • How To Go Pro • Waiting For Long Exposures

I’m traveling to Patagonia, and I want to carry 35mm infrared film. What suggestions do you have regarding how to get it through international (Argentinean) security? Will they absolutely insist that the film be removed from the canister?

Monday, December 17, 2007


Would you recommend the use of a drop-in polarizer with the Canon 400mm ƒ/2.8 for wildlife or landscape photography?

Monday, December 10, 2007

Reflecting On Reflections

Do you have any suggestions on photographing through glass at museums? I want to capture a dinosaur exhibit.

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