The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus ED 70-300mm f4.0-5.6 and the Olympus ED 75-300mm f4.8-6.7 for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Olympus ED 70-300mm f4.0-5.6 is the longer of the two lenses at 127mm. The Olympus ED 75-300mm f4.8-6.7 with a length of 116mm, is 11mm shorter. Besides being longer, the Olympus ED 70-300mm f4.0-5.6 also has a larger diameter of 80mm compared to the Olympus ED 75-300mm f4.8-6.7's 70mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Olympus ED 75-300mm f4.8-6.7 weighs 430g, 30% (190g) lighter than the Olympus ED 70-300mm f4.0-5.6's weight of 620g.
Filter Threads
Both the Olympus ED 70-300mm f4.0-5.6 and the Olympus ED 75-300mm f4.8-6.7 have the same Filter thread size of 58mm.
Below are links to the 58mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Olympus ED 70-300mm f4.0-5.6 has the Four Thirds lens mount whereas the Olympus ED 75-300mm f4.8-6.7 has the Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with these mounts are Olympus E-5, Olympus E-600 and Olympus E-620 for the Four Thirds Mount and OM System OM-1 II, Panasonic G9 II and OM System OM-5 for the Micro Four Thirds Mount.
Focal Range
Olympus ED 70-300mm f4.0-5.6 has a focal range of 70-300mm and
4.3X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
140-600mm when used on a FourThirds format camera.
On the other hand, the Olympus ED 75-300mm f4.8-6.7 has a focal range of 75-300mm and 4.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 150-600mm when used on a FourThirds format camera.