My good old film EOS SII has just a single auto-focus (AF) point and can only focus on vertical or diagonal lines because its AF point had only one bar of photosensitive elements. New SLR cameras have cross type AF points that have two lines of photosensitive elements forming a cross, which allows such cameras to focus on vertical or horizontal lines.

I was always curious to see how different would be a scene captured on 35mm film and with a digital camera, so I dusted off my good old Canon EOS SII, bought a fresh battery and a few rolls of film. The tests described in this post were captured on FujiFilm ISO 160, color-balanced for daylight, which is the only low-sensitivity film the local photo store had in stock.

Crop factor is a term associated with sensors smaller than the standard 35mm film frame, which is commonly misunderstood, even by people who write for respectable sites, such as Luminous Landscape. Consider the Understanding the DSLR Magnification Factor article written by Nick Rains in 2002. In this article Nick writes:

‘Crop’ is a fairly good term – the imaging area is physically smaller. Less of the image circle projected by the lens is used, therefore it is a crop. The image remains the same size at the film plane for a given lens and subject distance – it is in no way magnified. It does, however, take up a larger proportion of the (smaller) frame and so it is easy to see why some people call it a magnifying effect.

I usually use several applications to edit images. I always start with Canon's Digital Photo Professional (DPP) and then use Noise Ninja, EnfuseGUI and GIMP, when I need to do selective noise reduction, tone mapping and additional editing and scaling. When I learned that DxO Labs, which maintains an awesome database of camera sensor test results, offers DXO Optics Pro v6.1.1 that does it all in one package, I decided to check it out.

Compact cameras are commonly considered as something that is only good for holiday family pictures and party shots. While there are many technical reasons why Single Lens Reflex (SLR) cameras produce better images, quality compacts pack enough technology to capture great photographs and the attention of your audience.

I was browsing the Lumix website and noticed that the shutter speed reported for an image of a hummingbird in flight was 1/125th of a second. Hummingbirds flap their wings at approximately 50 flaps per second, so I would expect the wings to show some motion blur at this shutter speed, which could be anywhere from 10% to 70% of the wing path. However, there was absolutely no motion blur in the picture.

I started to see hot pixels in my good old Coolpix E5900, so I decided to buy a new camera. After much research, my choice fell on Panasonic DMC-ZS1, which was highly recommended by DPreview in their group review of compact super zoom cameras:

http://www.dpreview.com/reviews/q209grouplongzoom/page16.asp

At first, the camera felt great - the 12x optical zoom range was awesome, which is about 6x magnification, compared to the 3x optical zoom of E5900. My excitement started to evaporate quite quickly though once I learned that the camera lacks basic control over image quality.