RSS Twitter YouTube

The DSLR Difference

Lenses & Sharpness

The A2's focal length (in 35mm equivalent) ranges from 28mm to 200mm. This is a 7X range which suits most types of photography with very little weight. With two accessory lenses, the A2 can have 22mm or 300mm focal lengths. This is of great convenience and many photographers are delighted by this possibility.

For the part of DSLRs, a much wider range of focal length can chosen from. Single lenses even exist with 7X to 10X zoom to match the convenience of the A2. However, these lenses come with the price of reduced image quality and slower apertures. Lenses with large zoom ranges usually have slow maximum apertures such as F3.5-F6.3, which at the telephoto end, is much slower than the A2's F3.5 at 200mm (300mm with accessory lens). This is important when considering the need for high ISO settings. A similar shutter speed at F3.5 with ISO 200 and at F6.3 with ISO 800 would produce the same exposure. Therefore, a DSLR with a single lens can't easily match the range, aperture speed and convenience of a non-SLR camera. Conversely a DSLR with a set of interchangeable lenses can have flexibility way beyond that of the a fixed lens camera. Note that the price of fast quality lenses for SLR cameras is very high and must be considered when evaluating its value.

There is a component that can't be matched between these two types of cameras: depth-of-field. At a given 35mm equivalent focal length, the A2 has depth-of-field that is more than 7 times deeper than the 20D. This ratio is much bigger when the focus distance approaches the hyper-focal distance of the lens. A photographer can interpret this as good or bad. Increased depth-of-field obviously allows much more sharpness and is less prone to focus errors. This is particularly apparent in macro shots. Reduced depth-of-field allows for selective focusing and increases isolation between the foreground and the background of a picture. Only the photographer can decide if this is an advantage or disadvantage.

It is known that DSLRs produce better pictures. What matters though is the suitability of those pictures. For many display purposes, differences can become indistinguishable. In order to evaluate picture quality, we viewed the images of both cameras at different sizes up to 25"x19" and compared sharpness, noise, contrast, color and saturation.

Sharpness appears about equal without counting noise (discussed later). Some pictures appeared to be sharper on the A2, others on the 20D. Below are two 100% crops of pictures from each camera. These represent a cropped region from an image 25" wide. At smaller sizes, there was no way to distinguish the sharpness of any images produced by these two cameras.

KM A2 ISO 100KM A2 - ISO 100, 1/250s F11
Canon 20 D ISO 100Canon 20D - ISO 100, 1/160s F11

Neocamera Blog is a medium for expressing ideas related to digital cameras and photography. Read about digital cameras in the context of technology, media, art and the world. Latest posts links:

Camera Bag

Clear

Your camera bag is empty. To add a camera or lens click on the star next to its name.

Your camera bag is empty.

Add cameras or lenses by clicking on the star next to their name.

Updates

    2017.12.07

  • 2017.12.07

    Think Tank Photo Spectral 10 Review

    Think Tank Photo Spectral 10 Review

    Review of the Think Thank Photo Spectral 10 photography shoulder bag.

  • 2017.11.29

  • 2017.11.29

    Fujifilm X-T20 Review

    Fujifilm X-T20 Review

    Highly compact mirrorless built around a 24 MP X-Trans CMOS III APS-C sensor and X-Processor Pro capable of 14 FPS drive and 4K Ultlra-HD video. Features dual control-dials and a 2.4 MP 0.39" EVF with 0.62X magnification and an Eye-Start Sensor.

  • 2017.11.23

  • 2017.11.23

    Digital Camera Viewfinder Comparison

    Digital Camera Viewfinder Comparison

    Global comparison of viewfinders from all digital cameras. Optical viewfinders (OVF) and electronic viewfinders (EVF) all in one easy to compare table.

  • 2017.11.10

  • 2017.11.10

    Best Digital Cameras of 2017

    Best Digital Cameras of 2017

    The Best Cameras of 2017 awarded by Neocamera: Best Travel-Zoom, Best Premium Compact, Best Ultra-Zoom, Best Mirrorless (Beginner, Advanced and Professional) and Best DSLR (Entry, Enthusiast and Professional), now including budget choices.

  • 2017.11.07

  • 2017.11.07

    MindShift Photocross 13 Review

    MindShift Photocross 13 Review

    Review of the Mindshift Photocross 13 Sling Bag.

  • 2017.11.01

  • 2017.11.01

    Fujifilm X-E3 Review

    Fujifilm X-E3 Review

    Unique Fujifilm rangefinder-styled mirrorless. 24 MP APS-C X-Trans CMOS III sensor with built-in 325-Point Hybrid AF system and X-Processor Pro. 14 FPS Drive with Electronic-Shutter or 8 FPS with Mechanical Shutter. 4K Ultra-HD Video at 30 FPS. Highly compact body with a builtin 2.4 MP 0.39" LCD with Eye-Start Sensor, 0.62X magnification and 100% coverage and 3" Touchscreen 1 MP LCD plus dual control-dials.

  • 2017.10.16

  • 2017.10.16

    Panasonic Lumix GX850 Review

    Panasonic Lumix GX850 Review

    Highly compact mirrorless with 16 MP Four-Thirds CMOS sensor capable of 4K Ultra-HD video. Fast 10 FPS drive and 1/16000s-60s hybrid shutter. 4K Output for 30 FPS bursts, Post Focus and built-in Focus Stacking.

  • 2017.10.07

  • 2017.10.07

    Olympus OM-D E-M1 Mark II Review

    Olympus OM-D E-M1 Mark II Review

    Olympus professional Micro Four-Thirds mirrorless with 20 MP sensor, built-in 5-axis Image-Stabilization, 121-Point Phase-Detect and Contrast Detect AF, 60 FPS Drive, 18 FPS with Continuous AF, Ultra-HD and Cinema 4K Video. Large built-in 2.4 MP 0.45" EVF with 100% Coverage, 0.74X magnification and Eye-Start Sensor in a freezeproof and weatherproof body with dual control-dials.

  • 2017.09.06

  • 2017.09.06

    Fujifilm GFX-50S In-Depth Review

    Fujifilm GFX-50S In-Depth Review

    In-depth review of the Fujifilm GFX-50S Medium Format Mirrorless Digital Camera, a groundbreaking 50 megapixels camera with large 44x33mm sensor and unique modular EVF system. ISO 50-102400 range, 3 FPS drive and 1080p video.

  • 2017.08.23

  • 2017.08.23

    Fujinon GFX Lens Roundup

    Fujinon GFX Lens Roundup

    Roundup of reviews for GFX Medium Format Mirrorless lenses: Fujinon GF 23mm F/4R LM WR, GF 32-64mm F/4R LM WR and GF 110mm F/2R LM WR.