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These days there are more choices when it comes to lenses and their size and it’s worth having some knowledge so you can best provide the equipment to suit your lifestyle. By looking at two lens types, you’ll find some key differences that may impact your choice of camera. The most important thing to remember to make the most out of your lenses and the results is that the image circle must be enough to cover the sensor.
Without it, you’ll find that your image has a rounded shape and dark corners.
Lenses that have been designed for APS digital are referred to as digital only. This means that they are designed to cover the APS sensor without any problems but cannot be transferred onto film cameras as they are not going to cover that sensor.
This can cause problems if you need your lenses to be backwards compatible with older film SLR camera bodies. This may also cause problems if any future designs have a sensor that corresponds to the size of a 35mm camera. The alternative is looking at the four thirds design.
This is a newer style of lens that does have some advantages over the other options available. One major feature is that it deals with light a bit better than the above mentioned lens types. This means that you may find images have less refraction or rays of light through them and if this is a problem for you then the four thirds style of lens could be better suited.
Cameras that feature the digital only lenses include some of the higher end cameras, namely Canon EF-S and Nikon DX. It’s a step away for Nikon who have been traditionally very good at keeping their lenses backwards and forwards compatible with both film and digital cameras.
If you prefer the sound of the four thirds style, then you will want to look at cameras made by manufacturers such as Olympus and Panasonic. Overall though you need to look into more than just lenses when shopping for a new digital SLR camera and take into account all the factors that differentiate the various brands on the market.
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