The Blog: See what
Sigma is saying.

Tag: Robert O’Toole
09.10.2013

Macro Photography: How Sensor Format Affects Image Depth of Field

© 2013 Robert OToole Photography | Lens: Sigma Macro 150mm F2.8 EX DG OS HSM |  Camera: NIKON D800E | ISO: 100 | Aperture: f8 | Shutter speed: 1/250 sec | single SB-R200 flash. This flower was framed in the viewfinder with a full frame sensor format body in FX (full frame) mode.

One of the biggest challenges with macro photography is working with a limited depth of field or DOF. When I am shooting macro I am always trying to make sure the subject and elements in the frame appear sharp by adjusting the aperture and making sure the important elements in image fall on the plane of focus by adjusting my angle of view. But there is another important element that has a huge effect on DOF that most people don’t even know about, how a different sensor format can and will effect the depth of field in your image. Moving to a smaller sensor format at the same apparent magnification will give you lots more DOF to work with in your macro images.

Read more >>

07.10.2013

Macro Photography: Working Distances with the Macro 105mm F2.8, 150mm F2.8 and 180mm F2.8

Sigma 180mm F2.8 EX DG OS HSM APO Macro. Image copyright 2013 Robert OToole Photography

Judging by the number of questions I get from photographers concerning the working distances of macro lenses I think it is a good subject to talk about.

The working distance of a macro lens, not to be confused with minimum focus distance, is the distance between the front of your lens and the subject. This is different from the minimum focus distance which instead means the distance to the subject as measured from the focal plane mark on the camera body, not from the front of the lens. Working distance is a more important figure since it tells how much space you have between the front of your lens and your subject. Working distance generally increases with longer focal length lenses, shorter lenses usually have shorter working distances.

Read more >>

11.26.2012

Spectacular wildlife in Pantanal, Brazil

Brazil’s Pantanal is one of earth’s most biologically rich areas and truly spectacular photography destination. Last month I took a scouting trip to the Pantanal for wildlife with with special emphasis on the jaguar. It was my first trip here and I have to say the photographic opportunities in the Pantanal were even better than I expected. Jaguar was the main target of the trip and I would have been happy just to see a single one but as it turns out we had the chance to photograph them each day and every day I was there. This is one of the best locations if not the best location on earth to photograph jaguar.

Read more >>

10.15.2012
09.26.2012

Top Macro Photography Tips by Robert O’Toole

1. Shoot low for the best angle of view Shooting at your macro subject’s eye level gives you a much […]

Read more >>

09.03.2012

Shades of Blue

For pure photographic opportunities Alaska is one of my favorite places on the globe. So spending time there each year […]

Read more >>

07.18.2012

Bee photography with Sigma’s 150mm f/2.8 EX Macro OS lens

This week I had a chance to take out the Sigma 150mm f/2.8 EX DG HSM APO Macro OS lens […]

Read more >>

06.21.2012

Handheld Macro Photography Field Techniques

Summer is here and this is a great time to get out in the field for some close-up photography. There […]

Read more >>

05.31.2012

Macro photography by Robert O’Toole

Honey bee hovering over a Calandrinia flower. Sigma 180mm f/3.5 EX APO Macro HSM lens, single flash with diffuser at 1:8 power, handheld, Manual mode 1/250th sec, f8, ISO 500.

Macro or close-up photography is one of the most enjoyable and rewarding forms of nature photography. The proper set up […]

Read more >>

05.31.2012

LENS EXPLORATION: 120-300mm F2.8 EX DG OS HSM, Part II

120-300OS-2

120-300mm F2.8 EX DG OS HSM features: Designed for use with full frame digital SLR cameras. May also be used with […]

Read more >>